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When there are huge number of DAMON regions that specific scheme actions are tried to be applied, directories and files under 'tried_regions' scheme directory could waste some memory. Add another special input keyword ('clear_schemes_tried_regions') for 'state' file of each kdamond sysfs directory that can be used for cleanup of the 'tried_regions' sub-directories. [sj@kernel.org: skip regions clearing if the scheme directory was removed] Link: https://lkml.kernel.org/r/20221114182954.4745-3-sj@kernel.org Link: https://lkml.kernel.org/r/20221101220328.95765-6-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
1339 lines
35 KiB
C
1339 lines
35 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* DAMON sysfs Interface
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*
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* Copyright (c) 2022 SeongJae Park <sj@kernel.org>
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*/
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#include <linux/slab.h>
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#include "sysfs-common.h"
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/*
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* scheme region directory
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*/
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struct damon_sysfs_scheme_region {
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struct kobject kobj;
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struct damon_addr_range ar;
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unsigned int nr_accesses;
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unsigned int age;
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struct list_head list;
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};
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static struct damon_sysfs_scheme_region *damon_sysfs_scheme_region_alloc(
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struct damon_region *region)
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{
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struct damon_sysfs_scheme_region *sysfs_region = kmalloc(
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sizeof(*sysfs_region), GFP_KERNEL);
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if (!sysfs_region)
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return NULL;
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sysfs_region->kobj = (struct kobject){};
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sysfs_region->ar = region->ar;
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sysfs_region->nr_accesses = region->nr_accesses;
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sysfs_region->age = region->age;
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INIT_LIST_HEAD(&sysfs_region->list);
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return sysfs_region;
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}
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static ssize_t start_show(struct kobject *kobj, struct kobj_attribute *attr,
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char *buf)
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{
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struct damon_sysfs_scheme_region *region = container_of(kobj,
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struct damon_sysfs_scheme_region, kobj);
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return sysfs_emit(buf, "%lu\n", region->ar.start);
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}
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static ssize_t end_show(struct kobject *kobj, struct kobj_attribute *attr,
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char *buf)
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{
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struct damon_sysfs_scheme_region *region = container_of(kobj,
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struct damon_sysfs_scheme_region, kobj);
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return sysfs_emit(buf, "%lu\n", region->ar.end);
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}
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static ssize_t nr_accesses_show(struct kobject *kobj,
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struct kobj_attribute *attr, char *buf)
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{
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struct damon_sysfs_scheme_region *region = container_of(kobj,
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struct damon_sysfs_scheme_region, kobj);
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return sysfs_emit(buf, "%u\n", region->nr_accesses);
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}
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static ssize_t age_show(struct kobject *kobj, struct kobj_attribute *attr,
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char *buf)
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{
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struct damon_sysfs_scheme_region *region = container_of(kobj,
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struct damon_sysfs_scheme_region, kobj);
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return sysfs_emit(buf, "%u\n", region->age);
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}
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static void damon_sysfs_scheme_region_release(struct kobject *kobj)
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{
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struct damon_sysfs_scheme_region *region = container_of(kobj,
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struct damon_sysfs_scheme_region, kobj);
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list_del(®ion->list);
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kfree(region);
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}
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static struct kobj_attribute damon_sysfs_scheme_region_start_attr =
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__ATTR_RO_MODE(start, 0400);
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static struct kobj_attribute damon_sysfs_scheme_region_end_attr =
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__ATTR_RO_MODE(end, 0400);
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static struct kobj_attribute damon_sysfs_scheme_region_nr_accesses_attr =
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__ATTR_RO_MODE(nr_accesses, 0400);
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static struct kobj_attribute damon_sysfs_scheme_region_age_attr =
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__ATTR_RO_MODE(age, 0400);
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static struct attribute *damon_sysfs_scheme_region_attrs[] = {
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&damon_sysfs_scheme_region_start_attr.attr,
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&damon_sysfs_scheme_region_end_attr.attr,
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&damon_sysfs_scheme_region_nr_accesses_attr.attr,
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&damon_sysfs_scheme_region_age_attr.attr,
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NULL,
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};
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ATTRIBUTE_GROUPS(damon_sysfs_scheme_region);
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static struct kobj_type damon_sysfs_scheme_region_ktype = {
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.release = damon_sysfs_scheme_region_release,
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.sysfs_ops = &kobj_sysfs_ops,
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.default_groups = damon_sysfs_scheme_region_groups,
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};
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/*
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* scheme regions directory
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*/
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struct damon_sysfs_scheme_regions {
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struct kobject kobj;
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struct list_head regions_list;
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int nr_regions;
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};
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static struct damon_sysfs_scheme_regions *
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damon_sysfs_scheme_regions_alloc(void)
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{
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struct damon_sysfs_scheme_regions *regions = kmalloc(sizeof(*regions),
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GFP_KERNEL);
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regions->kobj = (struct kobject){};
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INIT_LIST_HEAD(®ions->regions_list);
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regions->nr_regions = 0;
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return regions;
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}
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static void damon_sysfs_scheme_regions_rm_dirs(
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struct damon_sysfs_scheme_regions *regions)
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{
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struct damon_sysfs_scheme_region *r, *next;
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list_for_each_entry_safe(r, next, ®ions->regions_list, list) {
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/* release function deletes it from the list */
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kobject_put(&r->kobj);
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regions->nr_regions--;
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}
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}
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static void damon_sysfs_scheme_regions_release(struct kobject *kobj)
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{
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kfree(container_of(kobj, struct damon_sysfs_scheme_regions, kobj));
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}
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static struct attribute *damon_sysfs_scheme_regions_attrs[] = {
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NULL,
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};
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ATTRIBUTE_GROUPS(damon_sysfs_scheme_regions);
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static struct kobj_type damon_sysfs_scheme_regions_ktype = {
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.release = damon_sysfs_scheme_regions_release,
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.sysfs_ops = &kobj_sysfs_ops,
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.default_groups = damon_sysfs_scheme_regions_groups,
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};
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/*
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* schemes/stats directory
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*/
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struct damon_sysfs_stats {
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struct kobject kobj;
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unsigned long nr_tried;
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unsigned long sz_tried;
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unsigned long nr_applied;
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unsigned long sz_applied;
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unsigned long qt_exceeds;
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};
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static struct damon_sysfs_stats *damon_sysfs_stats_alloc(void)
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{
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return kzalloc(sizeof(struct damon_sysfs_stats), GFP_KERNEL);
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}
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static ssize_t nr_tried_show(struct kobject *kobj, struct kobj_attribute *attr,
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char *buf)
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{
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struct damon_sysfs_stats *stats = container_of(kobj,
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struct damon_sysfs_stats, kobj);
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return sysfs_emit(buf, "%lu\n", stats->nr_tried);
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}
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static ssize_t sz_tried_show(struct kobject *kobj, struct kobj_attribute *attr,
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char *buf)
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{
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struct damon_sysfs_stats *stats = container_of(kobj,
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struct damon_sysfs_stats, kobj);
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return sysfs_emit(buf, "%lu\n", stats->sz_tried);
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}
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static ssize_t nr_applied_show(struct kobject *kobj,
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struct kobj_attribute *attr, char *buf)
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{
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struct damon_sysfs_stats *stats = container_of(kobj,
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struct damon_sysfs_stats, kobj);
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return sysfs_emit(buf, "%lu\n", stats->nr_applied);
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}
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static ssize_t sz_applied_show(struct kobject *kobj,
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struct kobj_attribute *attr, char *buf)
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{
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struct damon_sysfs_stats *stats = container_of(kobj,
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struct damon_sysfs_stats, kobj);
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return sysfs_emit(buf, "%lu\n", stats->sz_applied);
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}
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static ssize_t qt_exceeds_show(struct kobject *kobj,
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struct kobj_attribute *attr, char *buf)
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{
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struct damon_sysfs_stats *stats = container_of(kobj,
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struct damon_sysfs_stats, kobj);
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return sysfs_emit(buf, "%lu\n", stats->qt_exceeds);
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}
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static void damon_sysfs_stats_release(struct kobject *kobj)
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{
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kfree(container_of(kobj, struct damon_sysfs_stats, kobj));
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}
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static struct kobj_attribute damon_sysfs_stats_nr_tried_attr =
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__ATTR_RO_MODE(nr_tried, 0400);
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static struct kobj_attribute damon_sysfs_stats_sz_tried_attr =
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__ATTR_RO_MODE(sz_tried, 0400);
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static struct kobj_attribute damon_sysfs_stats_nr_applied_attr =
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__ATTR_RO_MODE(nr_applied, 0400);
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static struct kobj_attribute damon_sysfs_stats_sz_applied_attr =
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__ATTR_RO_MODE(sz_applied, 0400);
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static struct kobj_attribute damon_sysfs_stats_qt_exceeds_attr =
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__ATTR_RO_MODE(qt_exceeds, 0400);
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static struct attribute *damon_sysfs_stats_attrs[] = {
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&damon_sysfs_stats_nr_tried_attr.attr,
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&damon_sysfs_stats_sz_tried_attr.attr,
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&damon_sysfs_stats_nr_applied_attr.attr,
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&damon_sysfs_stats_sz_applied_attr.attr,
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&damon_sysfs_stats_qt_exceeds_attr.attr,
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NULL,
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};
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ATTRIBUTE_GROUPS(damon_sysfs_stats);
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static struct kobj_type damon_sysfs_stats_ktype = {
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.release = damon_sysfs_stats_release,
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.sysfs_ops = &kobj_sysfs_ops,
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.default_groups = damon_sysfs_stats_groups,
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};
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/*
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* watermarks directory
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*/
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struct damon_sysfs_watermarks {
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struct kobject kobj;
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enum damos_wmark_metric metric;
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unsigned long interval_us;
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unsigned long high;
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unsigned long mid;
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unsigned long low;
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};
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static struct damon_sysfs_watermarks *damon_sysfs_watermarks_alloc(
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enum damos_wmark_metric metric, unsigned long interval_us,
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unsigned long high, unsigned long mid, unsigned long low)
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{
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struct damon_sysfs_watermarks *watermarks = kmalloc(
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sizeof(*watermarks), GFP_KERNEL);
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if (!watermarks)
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return NULL;
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watermarks->kobj = (struct kobject){};
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watermarks->metric = metric;
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watermarks->interval_us = interval_us;
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watermarks->high = high;
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watermarks->mid = mid;
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watermarks->low = low;
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return watermarks;
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}
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/* Should match with enum damos_wmark_metric */
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static const char * const damon_sysfs_wmark_metric_strs[] = {
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"none",
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"free_mem_rate",
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};
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static ssize_t metric_show(struct kobject *kobj, struct kobj_attribute *attr,
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char *buf)
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{
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struct damon_sysfs_watermarks *watermarks = container_of(kobj,
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struct damon_sysfs_watermarks, kobj);
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return sysfs_emit(buf, "%s\n",
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damon_sysfs_wmark_metric_strs[watermarks->metric]);
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}
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static ssize_t metric_store(struct kobject *kobj, struct kobj_attribute *attr,
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const char *buf, size_t count)
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{
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struct damon_sysfs_watermarks *watermarks = container_of(kobj,
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struct damon_sysfs_watermarks, kobj);
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enum damos_wmark_metric metric;
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for (metric = 0; metric < NR_DAMOS_WMARK_METRICS; metric++) {
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if (sysfs_streq(buf, damon_sysfs_wmark_metric_strs[metric])) {
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watermarks->metric = metric;
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return count;
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}
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}
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return -EINVAL;
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}
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static ssize_t interval_us_show(struct kobject *kobj,
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struct kobj_attribute *attr, char *buf)
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{
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struct damon_sysfs_watermarks *watermarks = container_of(kobj,
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struct damon_sysfs_watermarks, kobj);
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return sysfs_emit(buf, "%lu\n", watermarks->interval_us);
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}
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static ssize_t interval_us_store(struct kobject *kobj,
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struct kobj_attribute *attr, const char *buf, size_t count)
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{
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struct damon_sysfs_watermarks *watermarks = container_of(kobj,
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struct damon_sysfs_watermarks, kobj);
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int err = kstrtoul(buf, 0, &watermarks->interval_us);
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return err ? err : count;
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}
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static ssize_t high_show(struct kobject *kobj,
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struct kobj_attribute *attr, char *buf)
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{
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struct damon_sysfs_watermarks *watermarks = container_of(kobj,
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struct damon_sysfs_watermarks, kobj);
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return sysfs_emit(buf, "%lu\n", watermarks->high);
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}
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static ssize_t high_store(struct kobject *kobj,
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struct kobj_attribute *attr, const char *buf, size_t count)
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{
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struct damon_sysfs_watermarks *watermarks = container_of(kobj,
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struct damon_sysfs_watermarks, kobj);
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int err = kstrtoul(buf, 0, &watermarks->high);
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return err ? err : count;
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}
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static ssize_t mid_show(struct kobject *kobj,
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struct kobj_attribute *attr, char *buf)
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{
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struct damon_sysfs_watermarks *watermarks = container_of(kobj,
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struct damon_sysfs_watermarks, kobj);
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return sysfs_emit(buf, "%lu\n", watermarks->mid);
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}
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static ssize_t mid_store(struct kobject *kobj,
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struct kobj_attribute *attr, const char *buf, size_t count)
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{
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struct damon_sysfs_watermarks *watermarks = container_of(kobj,
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struct damon_sysfs_watermarks, kobj);
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int err = kstrtoul(buf, 0, &watermarks->mid);
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return err ? err : count;
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}
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static ssize_t low_show(struct kobject *kobj,
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struct kobj_attribute *attr, char *buf)
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{
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struct damon_sysfs_watermarks *watermarks = container_of(kobj,
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struct damon_sysfs_watermarks, kobj);
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return sysfs_emit(buf, "%lu\n", watermarks->low);
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}
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static ssize_t low_store(struct kobject *kobj,
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struct kobj_attribute *attr, const char *buf, size_t count)
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{
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struct damon_sysfs_watermarks *watermarks = container_of(kobj,
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struct damon_sysfs_watermarks, kobj);
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int err = kstrtoul(buf, 0, &watermarks->low);
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return err ? err : count;
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}
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static void damon_sysfs_watermarks_release(struct kobject *kobj)
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{
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kfree(container_of(kobj, struct damon_sysfs_watermarks, kobj));
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}
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static struct kobj_attribute damon_sysfs_watermarks_metric_attr =
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__ATTR_RW_MODE(metric, 0600);
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static struct kobj_attribute damon_sysfs_watermarks_interval_us_attr =
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__ATTR_RW_MODE(interval_us, 0600);
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static struct kobj_attribute damon_sysfs_watermarks_high_attr =
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__ATTR_RW_MODE(high, 0600);
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static struct kobj_attribute damon_sysfs_watermarks_mid_attr =
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__ATTR_RW_MODE(mid, 0600);
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static struct kobj_attribute damon_sysfs_watermarks_low_attr =
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__ATTR_RW_MODE(low, 0600);
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static struct attribute *damon_sysfs_watermarks_attrs[] = {
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&damon_sysfs_watermarks_metric_attr.attr,
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&damon_sysfs_watermarks_interval_us_attr.attr,
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&damon_sysfs_watermarks_high_attr.attr,
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&damon_sysfs_watermarks_mid_attr.attr,
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&damon_sysfs_watermarks_low_attr.attr,
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NULL,
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};
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ATTRIBUTE_GROUPS(damon_sysfs_watermarks);
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static struct kobj_type damon_sysfs_watermarks_ktype = {
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.release = damon_sysfs_watermarks_release,
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.sysfs_ops = &kobj_sysfs_ops,
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.default_groups = damon_sysfs_watermarks_groups,
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};
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/*
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* scheme/weights directory
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*/
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struct damon_sysfs_weights {
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struct kobject kobj;
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unsigned int sz;
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unsigned int nr_accesses;
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unsigned int age;
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};
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static struct damon_sysfs_weights *damon_sysfs_weights_alloc(unsigned int sz,
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unsigned int nr_accesses, unsigned int age)
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{
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struct damon_sysfs_weights *weights = kmalloc(sizeof(*weights),
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GFP_KERNEL);
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if (!weights)
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return NULL;
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weights->kobj = (struct kobject){};
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weights->sz = sz;
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weights->nr_accesses = nr_accesses;
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weights->age = age;
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return weights;
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}
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static ssize_t sz_permil_show(struct kobject *kobj,
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struct kobj_attribute *attr, char *buf)
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{
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struct damon_sysfs_weights *weights = container_of(kobj,
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struct damon_sysfs_weights, kobj);
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return sysfs_emit(buf, "%u\n", weights->sz);
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}
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static ssize_t sz_permil_store(struct kobject *kobj,
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struct kobj_attribute *attr, const char *buf, size_t count)
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{
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struct damon_sysfs_weights *weights = container_of(kobj,
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struct damon_sysfs_weights, kobj);
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int err = kstrtouint(buf, 0, &weights->sz);
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return err ? err : count;
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}
|
|
|
|
static ssize_t nr_accesses_permil_show(struct kobject *kobj,
|
|
struct kobj_attribute *attr, char *buf)
|
|
{
|
|
struct damon_sysfs_weights *weights = container_of(kobj,
|
|
struct damon_sysfs_weights, kobj);
|
|
|
|
return sysfs_emit(buf, "%u\n", weights->nr_accesses);
|
|
}
|
|
|
|
static ssize_t nr_accesses_permil_store(struct kobject *kobj,
|
|
struct kobj_attribute *attr, const char *buf, size_t count)
|
|
{
|
|
struct damon_sysfs_weights *weights = container_of(kobj,
|
|
struct damon_sysfs_weights, kobj);
|
|
int err = kstrtouint(buf, 0, &weights->nr_accesses);
|
|
|
|
return err ? err : count;
|
|
}
|
|
|
|
static ssize_t age_permil_show(struct kobject *kobj,
|
|
struct kobj_attribute *attr, char *buf)
|
|
{
|
|
struct damon_sysfs_weights *weights = container_of(kobj,
|
|
struct damon_sysfs_weights, kobj);
|
|
|
|
return sysfs_emit(buf, "%u\n", weights->age);
|
|
}
|
|
|
|
static ssize_t age_permil_store(struct kobject *kobj,
|
|
struct kobj_attribute *attr, const char *buf, size_t count)
|
|
{
|
|
struct damon_sysfs_weights *weights = container_of(kobj,
|
|
struct damon_sysfs_weights, kobj);
|
|
int err = kstrtouint(buf, 0, &weights->age);
|
|
|
|
return err ? err : count;
|
|
}
|
|
|
|
static void damon_sysfs_weights_release(struct kobject *kobj)
|
|
{
|
|
kfree(container_of(kobj, struct damon_sysfs_weights, kobj));
|
|
}
|
|
|
|
static struct kobj_attribute damon_sysfs_weights_sz_attr =
|
|
__ATTR_RW_MODE(sz_permil, 0600);
|
|
|
|
static struct kobj_attribute damon_sysfs_weights_nr_accesses_attr =
|
|
__ATTR_RW_MODE(nr_accesses_permil, 0600);
|
|
|
|
static struct kobj_attribute damon_sysfs_weights_age_attr =
|
|
__ATTR_RW_MODE(age_permil, 0600);
|
|
|
|
static struct attribute *damon_sysfs_weights_attrs[] = {
|
|
&damon_sysfs_weights_sz_attr.attr,
|
|
&damon_sysfs_weights_nr_accesses_attr.attr,
|
|
&damon_sysfs_weights_age_attr.attr,
|
|
NULL,
|
|
};
|
|
ATTRIBUTE_GROUPS(damon_sysfs_weights);
|
|
|
|
static struct kobj_type damon_sysfs_weights_ktype = {
|
|
.release = damon_sysfs_weights_release,
|
|
.sysfs_ops = &kobj_sysfs_ops,
|
|
.default_groups = damon_sysfs_weights_groups,
|
|
};
|
|
|
|
/*
|
|
* quotas directory
|
|
*/
|
|
|
|
struct damon_sysfs_quotas {
|
|
struct kobject kobj;
|
|
struct damon_sysfs_weights *weights;
|
|
unsigned long ms;
|
|
unsigned long sz;
|
|
unsigned long reset_interval_ms;
|
|
};
|
|
|
|
static struct damon_sysfs_quotas *damon_sysfs_quotas_alloc(void)
|
|
{
|
|
return kzalloc(sizeof(struct damon_sysfs_quotas), GFP_KERNEL);
|
|
}
|
|
|
|
static int damon_sysfs_quotas_add_dirs(struct damon_sysfs_quotas *quotas)
|
|
{
|
|
struct damon_sysfs_weights *weights;
|
|
int err;
|
|
|
|
weights = damon_sysfs_weights_alloc(0, 0, 0);
|
|
if (!weights)
|
|
return -ENOMEM;
|
|
|
|
err = kobject_init_and_add(&weights->kobj, &damon_sysfs_weights_ktype,
|
|
"as->kobj, "weights");
|
|
if (err)
|
|
kobject_put(&weights->kobj);
|
|
else
|
|
quotas->weights = weights;
|
|
return err;
|
|
}
|
|
|
|
static void damon_sysfs_quotas_rm_dirs(struct damon_sysfs_quotas *quotas)
|
|
{
|
|
kobject_put("as->weights->kobj);
|
|
}
|
|
|
|
static ssize_t ms_show(struct kobject *kobj, struct kobj_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct damon_sysfs_quotas *quotas = container_of(kobj,
|
|
struct damon_sysfs_quotas, kobj);
|
|
|
|
return sysfs_emit(buf, "%lu\n", quotas->ms);
|
|
}
|
|
|
|
static ssize_t ms_store(struct kobject *kobj, struct kobj_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct damon_sysfs_quotas *quotas = container_of(kobj,
|
|
struct damon_sysfs_quotas, kobj);
|
|
int err = kstrtoul(buf, 0, "as->ms);
|
|
|
|
if (err)
|
|
return -EINVAL;
|
|
return count;
|
|
}
|
|
|
|
static ssize_t bytes_show(struct kobject *kobj, struct kobj_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct damon_sysfs_quotas *quotas = container_of(kobj,
|
|
struct damon_sysfs_quotas, kobj);
|
|
|
|
return sysfs_emit(buf, "%lu\n", quotas->sz);
|
|
}
|
|
|
|
static ssize_t bytes_store(struct kobject *kobj,
|
|
struct kobj_attribute *attr, const char *buf, size_t count)
|
|
{
|
|
struct damon_sysfs_quotas *quotas = container_of(kobj,
|
|
struct damon_sysfs_quotas, kobj);
|
|
int err = kstrtoul(buf, 0, "as->sz);
|
|
|
|
if (err)
|
|
return -EINVAL;
|
|
return count;
|
|
}
|
|
|
|
static ssize_t reset_interval_ms_show(struct kobject *kobj,
|
|
struct kobj_attribute *attr, char *buf)
|
|
{
|
|
struct damon_sysfs_quotas *quotas = container_of(kobj,
|
|
struct damon_sysfs_quotas, kobj);
|
|
|
|
return sysfs_emit(buf, "%lu\n", quotas->reset_interval_ms);
|
|
}
|
|
|
|
static ssize_t reset_interval_ms_store(struct kobject *kobj,
|
|
struct kobj_attribute *attr, const char *buf, size_t count)
|
|
{
|
|
struct damon_sysfs_quotas *quotas = container_of(kobj,
|
|
struct damon_sysfs_quotas, kobj);
|
|
int err = kstrtoul(buf, 0, "as->reset_interval_ms);
|
|
|
|
if (err)
|
|
return -EINVAL;
|
|
return count;
|
|
}
|
|
|
|
static void damon_sysfs_quotas_release(struct kobject *kobj)
|
|
{
|
|
kfree(container_of(kobj, struct damon_sysfs_quotas, kobj));
|
|
}
|
|
|
|
static struct kobj_attribute damon_sysfs_quotas_ms_attr =
|
|
__ATTR_RW_MODE(ms, 0600);
|
|
|
|
static struct kobj_attribute damon_sysfs_quotas_sz_attr =
|
|
__ATTR_RW_MODE(bytes, 0600);
|
|
|
|
static struct kobj_attribute damon_sysfs_quotas_reset_interval_ms_attr =
|
|
__ATTR_RW_MODE(reset_interval_ms, 0600);
|
|
|
|
static struct attribute *damon_sysfs_quotas_attrs[] = {
|
|
&damon_sysfs_quotas_ms_attr.attr,
|
|
&damon_sysfs_quotas_sz_attr.attr,
|
|
&damon_sysfs_quotas_reset_interval_ms_attr.attr,
|
|
NULL,
|
|
};
|
|
ATTRIBUTE_GROUPS(damon_sysfs_quotas);
|
|
|
|
static struct kobj_type damon_sysfs_quotas_ktype = {
|
|
.release = damon_sysfs_quotas_release,
|
|
.sysfs_ops = &kobj_sysfs_ops,
|
|
.default_groups = damon_sysfs_quotas_groups,
|
|
};
|
|
|
|
/*
|
|
* access_pattern directory
|
|
*/
|
|
|
|
struct damon_sysfs_access_pattern {
|
|
struct kobject kobj;
|
|
struct damon_sysfs_ul_range *sz;
|
|
struct damon_sysfs_ul_range *nr_accesses;
|
|
struct damon_sysfs_ul_range *age;
|
|
};
|
|
|
|
static
|
|
struct damon_sysfs_access_pattern *damon_sysfs_access_pattern_alloc(void)
|
|
{
|
|
struct damon_sysfs_access_pattern *access_pattern =
|
|
kmalloc(sizeof(*access_pattern), GFP_KERNEL);
|
|
|
|
if (!access_pattern)
|
|
return NULL;
|
|
access_pattern->kobj = (struct kobject){};
|
|
return access_pattern;
|
|
}
|
|
|
|
static int damon_sysfs_access_pattern_add_range_dir(
|
|
struct damon_sysfs_access_pattern *access_pattern,
|
|
struct damon_sysfs_ul_range **range_dir_ptr,
|
|
char *name)
|
|
{
|
|
struct damon_sysfs_ul_range *range = damon_sysfs_ul_range_alloc(0, 0);
|
|
int err;
|
|
|
|
if (!range)
|
|
return -ENOMEM;
|
|
err = kobject_init_and_add(&range->kobj, &damon_sysfs_ul_range_ktype,
|
|
&access_pattern->kobj, name);
|
|
if (err)
|
|
kobject_put(&range->kobj);
|
|
else
|
|
*range_dir_ptr = range;
|
|
return err;
|
|
}
|
|
|
|
static int damon_sysfs_access_pattern_add_dirs(
|
|
struct damon_sysfs_access_pattern *access_pattern)
|
|
{
|
|
int err;
|
|
|
|
err = damon_sysfs_access_pattern_add_range_dir(access_pattern,
|
|
&access_pattern->sz, "sz");
|
|
if (err)
|
|
goto put_sz_out;
|
|
|
|
err = damon_sysfs_access_pattern_add_range_dir(access_pattern,
|
|
&access_pattern->nr_accesses, "nr_accesses");
|
|
if (err)
|
|
goto put_nr_accesses_sz_out;
|
|
|
|
err = damon_sysfs_access_pattern_add_range_dir(access_pattern,
|
|
&access_pattern->age, "age");
|
|
if (err)
|
|
goto put_age_nr_accesses_sz_out;
|
|
return 0;
|
|
|
|
put_age_nr_accesses_sz_out:
|
|
kobject_put(&access_pattern->age->kobj);
|
|
access_pattern->age = NULL;
|
|
put_nr_accesses_sz_out:
|
|
kobject_put(&access_pattern->nr_accesses->kobj);
|
|
access_pattern->nr_accesses = NULL;
|
|
put_sz_out:
|
|
kobject_put(&access_pattern->sz->kobj);
|
|
access_pattern->sz = NULL;
|
|
return err;
|
|
}
|
|
|
|
static void damon_sysfs_access_pattern_rm_dirs(
|
|
struct damon_sysfs_access_pattern *access_pattern)
|
|
{
|
|
kobject_put(&access_pattern->sz->kobj);
|
|
kobject_put(&access_pattern->nr_accesses->kobj);
|
|
kobject_put(&access_pattern->age->kobj);
|
|
}
|
|
|
|
static void damon_sysfs_access_pattern_release(struct kobject *kobj)
|
|
{
|
|
kfree(container_of(kobj, struct damon_sysfs_access_pattern, kobj));
|
|
}
|
|
|
|
static struct attribute *damon_sysfs_access_pattern_attrs[] = {
|
|
NULL,
|
|
};
|
|
ATTRIBUTE_GROUPS(damon_sysfs_access_pattern);
|
|
|
|
static struct kobj_type damon_sysfs_access_pattern_ktype = {
|
|
.release = damon_sysfs_access_pattern_release,
|
|
.sysfs_ops = &kobj_sysfs_ops,
|
|
.default_groups = damon_sysfs_access_pattern_groups,
|
|
};
|
|
|
|
/*
|
|
* scheme directory
|
|
*/
|
|
|
|
struct damon_sysfs_scheme {
|
|
struct kobject kobj;
|
|
enum damos_action action;
|
|
struct damon_sysfs_access_pattern *access_pattern;
|
|
struct damon_sysfs_quotas *quotas;
|
|
struct damon_sysfs_watermarks *watermarks;
|
|
struct damon_sysfs_stats *stats;
|
|
struct damon_sysfs_scheme_regions *tried_regions;
|
|
};
|
|
|
|
/* This should match with enum damos_action */
|
|
static const char * const damon_sysfs_damos_action_strs[] = {
|
|
"willneed",
|
|
"cold",
|
|
"pageout",
|
|
"hugepage",
|
|
"nohugepage",
|
|
"lru_prio",
|
|
"lru_deprio",
|
|
"stat",
|
|
};
|
|
|
|
static struct damon_sysfs_scheme *damon_sysfs_scheme_alloc(
|
|
enum damos_action action)
|
|
{
|
|
struct damon_sysfs_scheme *scheme = kmalloc(sizeof(*scheme),
|
|
GFP_KERNEL);
|
|
|
|
if (!scheme)
|
|
return NULL;
|
|
scheme->kobj = (struct kobject){};
|
|
scheme->action = action;
|
|
return scheme;
|
|
}
|
|
|
|
static int damon_sysfs_scheme_set_access_pattern(
|
|
struct damon_sysfs_scheme *scheme)
|
|
{
|
|
struct damon_sysfs_access_pattern *access_pattern;
|
|
int err;
|
|
|
|
access_pattern = damon_sysfs_access_pattern_alloc();
|
|
if (!access_pattern)
|
|
return -ENOMEM;
|
|
err = kobject_init_and_add(&access_pattern->kobj,
|
|
&damon_sysfs_access_pattern_ktype, &scheme->kobj,
|
|
"access_pattern");
|
|
if (err)
|
|
goto out;
|
|
err = damon_sysfs_access_pattern_add_dirs(access_pattern);
|
|
if (err)
|
|
goto out;
|
|
scheme->access_pattern = access_pattern;
|
|
return 0;
|
|
|
|
out:
|
|
kobject_put(&access_pattern->kobj);
|
|
return err;
|
|
}
|
|
|
|
static int damon_sysfs_scheme_set_quotas(struct damon_sysfs_scheme *scheme)
|
|
{
|
|
struct damon_sysfs_quotas *quotas = damon_sysfs_quotas_alloc();
|
|
int err;
|
|
|
|
if (!quotas)
|
|
return -ENOMEM;
|
|
err = kobject_init_and_add("as->kobj, &damon_sysfs_quotas_ktype,
|
|
&scheme->kobj, "quotas");
|
|
if (err)
|
|
goto out;
|
|
err = damon_sysfs_quotas_add_dirs(quotas);
|
|
if (err)
|
|
goto out;
|
|
scheme->quotas = quotas;
|
|
return 0;
|
|
|
|
out:
|
|
kobject_put("as->kobj);
|
|
return err;
|
|
}
|
|
|
|
static int damon_sysfs_scheme_set_watermarks(struct damon_sysfs_scheme *scheme)
|
|
{
|
|
struct damon_sysfs_watermarks *watermarks =
|
|
damon_sysfs_watermarks_alloc(DAMOS_WMARK_NONE, 0, 0, 0, 0);
|
|
int err;
|
|
|
|
if (!watermarks)
|
|
return -ENOMEM;
|
|
err = kobject_init_and_add(&watermarks->kobj,
|
|
&damon_sysfs_watermarks_ktype, &scheme->kobj,
|
|
"watermarks");
|
|
if (err)
|
|
kobject_put(&watermarks->kobj);
|
|
else
|
|
scheme->watermarks = watermarks;
|
|
return err;
|
|
}
|
|
|
|
static int damon_sysfs_scheme_set_stats(struct damon_sysfs_scheme *scheme)
|
|
{
|
|
struct damon_sysfs_stats *stats = damon_sysfs_stats_alloc();
|
|
int err;
|
|
|
|
if (!stats)
|
|
return -ENOMEM;
|
|
err = kobject_init_and_add(&stats->kobj, &damon_sysfs_stats_ktype,
|
|
&scheme->kobj, "stats");
|
|
if (err)
|
|
kobject_put(&stats->kobj);
|
|
else
|
|
scheme->stats = stats;
|
|
return err;
|
|
}
|
|
|
|
static int damon_sysfs_scheme_set_tried_regions(
|
|
struct damon_sysfs_scheme *scheme)
|
|
{
|
|
struct damon_sysfs_scheme_regions *tried_regions =
|
|
damon_sysfs_scheme_regions_alloc();
|
|
int err;
|
|
|
|
if (!tried_regions)
|
|
return -ENOMEM;
|
|
err = kobject_init_and_add(&tried_regions->kobj,
|
|
&damon_sysfs_scheme_regions_ktype, &scheme->kobj,
|
|
"tried_regions");
|
|
if (err)
|
|
kobject_put(&tried_regions->kobj);
|
|
else
|
|
scheme->tried_regions = tried_regions;
|
|
return err;
|
|
}
|
|
|
|
static int damon_sysfs_scheme_add_dirs(struct damon_sysfs_scheme *scheme)
|
|
{
|
|
int err;
|
|
|
|
err = damon_sysfs_scheme_set_access_pattern(scheme);
|
|
if (err)
|
|
return err;
|
|
err = damon_sysfs_scheme_set_quotas(scheme);
|
|
if (err)
|
|
goto put_access_pattern_out;
|
|
err = damon_sysfs_scheme_set_watermarks(scheme);
|
|
if (err)
|
|
goto put_quotas_access_pattern_out;
|
|
err = damon_sysfs_scheme_set_stats(scheme);
|
|
if (err)
|
|
goto put_watermarks_quotas_access_pattern_out;
|
|
err = damon_sysfs_scheme_set_tried_regions(scheme);
|
|
if (err)
|
|
goto put_tried_regions_out;
|
|
return 0;
|
|
|
|
put_tried_regions_out:
|
|
kobject_put(&scheme->tried_regions->kobj);
|
|
scheme->tried_regions = NULL;
|
|
put_watermarks_quotas_access_pattern_out:
|
|
kobject_put(&scheme->watermarks->kobj);
|
|
scheme->watermarks = NULL;
|
|
put_quotas_access_pattern_out:
|
|
kobject_put(&scheme->quotas->kobj);
|
|
scheme->quotas = NULL;
|
|
put_access_pattern_out:
|
|
kobject_put(&scheme->access_pattern->kobj);
|
|
scheme->access_pattern = NULL;
|
|
return err;
|
|
}
|
|
|
|
static void damon_sysfs_scheme_rm_dirs(struct damon_sysfs_scheme *scheme)
|
|
{
|
|
damon_sysfs_access_pattern_rm_dirs(scheme->access_pattern);
|
|
kobject_put(&scheme->access_pattern->kobj);
|
|
damon_sysfs_quotas_rm_dirs(scheme->quotas);
|
|
kobject_put(&scheme->quotas->kobj);
|
|
kobject_put(&scheme->watermarks->kobj);
|
|
kobject_put(&scheme->stats->kobj);
|
|
damon_sysfs_scheme_regions_rm_dirs(scheme->tried_regions);
|
|
kobject_put(&scheme->tried_regions->kobj);
|
|
}
|
|
|
|
static ssize_t action_show(struct kobject *kobj, struct kobj_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct damon_sysfs_scheme *scheme = container_of(kobj,
|
|
struct damon_sysfs_scheme, kobj);
|
|
|
|
return sysfs_emit(buf, "%s\n",
|
|
damon_sysfs_damos_action_strs[scheme->action]);
|
|
}
|
|
|
|
static ssize_t action_store(struct kobject *kobj, struct kobj_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct damon_sysfs_scheme *scheme = container_of(kobj,
|
|
struct damon_sysfs_scheme, kobj);
|
|
enum damos_action action;
|
|
|
|
for (action = 0; action < NR_DAMOS_ACTIONS; action++) {
|
|
if (sysfs_streq(buf, damon_sysfs_damos_action_strs[action])) {
|
|
scheme->action = action;
|
|
return count;
|
|
}
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
static void damon_sysfs_scheme_release(struct kobject *kobj)
|
|
{
|
|
kfree(container_of(kobj, struct damon_sysfs_scheme, kobj));
|
|
}
|
|
|
|
static struct kobj_attribute damon_sysfs_scheme_action_attr =
|
|
__ATTR_RW_MODE(action, 0600);
|
|
|
|
static struct attribute *damon_sysfs_scheme_attrs[] = {
|
|
&damon_sysfs_scheme_action_attr.attr,
|
|
NULL,
|
|
};
|
|
ATTRIBUTE_GROUPS(damon_sysfs_scheme);
|
|
|
|
static struct kobj_type damon_sysfs_scheme_ktype = {
|
|
.release = damon_sysfs_scheme_release,
|
|
.sysfs_ops = &kobj_sysfs_ops,
|
|
.default_groups = damon_sysfs_scheme_groups,
|
|
};
|
|
|
|
/*
|
|
* schemes directory
|
|
*/
|
|
|
|
struct damon_sysfs_schemes *damon_sysfs_schemes_alloc(void)
|
|
{
|
|
return kzalloc(sizeof(struct damon_sysfs_schemes), GFP_KERNEL);
|
|
}
|
|
|
|
void damon_sysfs_schemes_rm_dirs(struct damon_sysfs_schemes *schemes)
|
|
{
|
|
struct damon_sysfs_scheme **schemes_arr = schemes->schemes_arr;
|
|
int i;
|
|
|
|
for (i = 0; i < schemes->nr; i++) {
|
|
damon_sysfs_scheme_rm_dirs(schemes_arr[i]);
|
|
kobject_put(&schemes_arr[i]->kobj);
|
|
}
|
|
schemes->nr = 0;
|
|
kfree(schemes_arr);
|
|
schemes->schemes_arr = NULL;
|
|
}
|
|
|
|
static int damon_sysfs_schemes_add_dirs(struct damon_sysfs_schemes *schemes,
|
|
int nr_schemes)
|
|
{
|
|
struct damon_sysfs_scheme **schemes_arr, *scheme;
|
|
int err, i;
|
|
|
|
damon_sysfs_schemes_rm_dirs(schemes);
|
|
if (!nr_schemes)
|
|
return 0;
|
|
|
|
schemes_arr = kmalloc_array(nr_schemes, sizeof(*schemes_arr),
|
|
GFP_KERNEL | __GFP_NOWARN);
|
|
if (!schemes_arr)
|
|
return -ENOMEM;
|
|
schemes->schemes_arr = schemes_arr;
|
|
|
|
for (i = 0; i < nr_schemes; i++) {
|
|
scheme = damon_sysfs_scheme_alloc(DAMOS_STAT);
|
|
if (!scheme) {
|
|
damon_sysfs_schemes_rm_dirs(schemes);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
err = kobject_init_and_add(&scheme->kobj,
|
|
&damon_sysfs_scheme_ktype, &schemes->kobj,
|
|
"%d", i);
|
|
if (err)
|
|
goto out;
|
|
err = damon_sysfs_scheme_add_dirs(scheme);
|
|
if (err)
|
|
goto out;
|
|
|
|
schemes_arr[i] = scheme;
|
|
schemes->nr++;
|
|
}
|
|
return 0;
|
|
|
|
out:
|
|
damon_sysfs_schemes_rm_dirs(schemes);
|
|
kobject_put(&scheme->kobj);
|
|
return err;
|
|
}
|
|
|
|
static ssize_t nr_schemes_show(struct kobject *kobj,
|
|
struct kobj_attribute *attr, char *buf)
|
|
{
|
|
struct damon_sysfs_schemes *schemes = container_of(kobj,
|
|
struct damon_sysfs_schemes, kobj);
|
|
|
|
return sysfs_emit(buf, "%d\n", schemes->nr);
|
|
}
|
|
|
|
static ssize_t nr_schemes_store(struct kobject *kobj,
|
|
struct kobj_attribute *attr, const char *buf, size_t count)
|
|
{
|
|
struct damon_sysfs_schemes *schemes;
|
|
int nr, err = kstrtoint(buf, 0, &nr);
|
|
|
|
if (err)
|
|
return err;
|
|
if (nr < 0)
|
|
return -EINVAL;
|
|
|
|
schemes = container_of(kobj, struct damon_sysfs_schemes, kobj);
|
|
|
|
if (!mutex_trylock(&damon_sysfs_lock))
|
|
return -EBUSY;
|
|
err = damon_sysfs_schemes_add_dirs(schemes, nr);
|
|
mutex_unlock(&damon_sysfs_lock);
|
|
if (err)
|
|
return err;
|
|
return count;
|
|
}
|
|
|
|
static void damon_sysfs_schemes_release(struct kobject *kobj)
|
|
{
|
|
kfree(container_of(kobj, struct damon_sysfs_schemes, kobj));
|
|
}
|
|
|
|
static struct kobj_attribute damon_sysfs_schemes_nr_attr =
|
|
__ATTR_RW_MODE(nr_schemes, 0600);
|
|
|
|
static struct attribute *damon_sysfs_schemes_attrs[] = {
|
|
&damon_sysfs_schemes_nr_attr.attr,
|
|
NULL,
|
|
};
|
|
ATTRIBUTE_GROUPS(damon_sysfs_schemes);
|
|
|
|
struct kobj_type damon_sysfs_schemes_ktype = {
|
|
.release = damon_sysfs_schemes_release,
|
|
.sysfs_ops = &kobj_sysfs_ops,
|
|
.default_groups = damon_sysfs_schemes_groups,
|
|
};
|
|
|
|
static struct damos *damon_sysfs_mk_scheme(
|
|
struct damon_sysfs_scheme *sysfs_scheme)
|
|
{
|
|
struct damon_sysfs_access_pattern *access_pattern =
|
|
sysfs_scheme->access_pattern;
|
|
struct damon_sysfs_quotas *sysfs_quotas = sysfs_scheme->quotas;
|
|
struct damon_sysfs_weights *sysfs_weights = sysfs_quotas->weights;
|
|
struct damon_sysfs_watermarks *sysfs_wmarks = sysfs_scheme->watermarks;
|
|
|
|
struct damos_access_pattern pattern = {
|
|
.min_sz_region = access_pattern->sz->min,
|
|
.max_sz_region = access_pattern->sz->max,
|
|
.min_nr_accesses = access_pattern->nr_accesses->min,
|
|
.max_nr_accesses = access_pattern->nr_accesses->max,
|
|
.min_age_region = access_pattern->age->min,
|
|
.max_age_region = access_pattern->age->max,
|
|
};
|
|
struct damos_quota quota = {
|
|
.ms = sysfs_quotas->ms,
|
|
.sz = sysfs_quotas->sz,
|
|
.reset_interval = sysfs_quotas->reset_interval_ms,
|
|
.weight_sz = sysfs_weights->sz,
|
|
.weight_nr_accesses = sysfs_weights->nr_accesses,
|
|
.weight_age = sysfs_weights->age,
|
|
};
|
|
struct damos_watermarks wmarks = {
|
|
.metric = sysfs_wmarks->metric,
|
|
.interval = sysfs_wmarks->interval_us,
|
|
.high = sysfs_wmarks->high,
|
|
.mid = sysfs_wmarks->mid,
|
|
.low = sysfs_wmarks->low,
|
|
};
|
|
|
|
return damon_new_scheme(&pattern, sysfs_scheme->action, "a,
|
|
&wmarks);
|
|
}
|
|
|
|
static void damon_sysfs_update_scheme(struct damos *scheme,
|
|
struct damon_sysfs_scheme *sysfs_scheme)
|
|
{
|
|
struct damon_sysfs_access_pattern *access_pattern =
|
|
sysfs_scheme->access_pattern;
|
|
struct damon_sysfs_quotas *sysfs_quotas = sysfs_scheme->quotas;
|
|
struct damon_sysfs_weights *sysfs_weights = sysfs_quotas->weights;
|
|
struct damon_sysfs_watermarks *sysfs_wmarks = sysfs_scheme->watermarks;
|
|
|
|
scheme->pattern.min_sz_region = access_pattern->sz->min;
|
|
scheme->pattern.max_sz_region = access_pattern->sz->max;
|
|
scheme->pattern.min_nr_accesses = access_pattern->nr_accesses->min;
|
|
scheme->pattern.max_nr_accesses = access_pattern->nr_accesses->max;
|
|
scheme->pattern.min_age_region = access_pattern->age->min;
|
|
scheme->pattern.max_age_region = access_pattern->age->max;
|
|
|
|
scheme->action = sysfs_scheme->action;
|
|
|
|
scheme->quota.ms = sysfs_quotas->ms;
|
|
scheme->quota.sz = sysfs_quotas->sz;
|
|
scheme->quota.reset_interval = sysfs_quotas->reset_interval_ms;
|
|
scheme->quota.weight_sz = sysfs_weights->sz;
|
|
scheme->quota.weight_nr_accesses = sysfs_weights->nr_accesses;
|
|
scheme->quota.weight_age = sysfs_weights->age;
|
|
|
|
scheme->wmarks.metric = sysfs_wmarks->metric;
|
|
scheme->wmarks.interval = sysfs_wmarks->interval_us;
|
|
scheme->wmarks.high = sysfs_wmarks->high;
|
|
scheme->wmarks.mid = sysfs_wmarks->mid;
|
|
scheme->wmarks.low = sysfs_wmarks->low;
|
|
}
|
|
|
|
int damon_sysfs_set_schemes(struct damon_ctx *ctx,
|
|
struct damon_sysfs_schemes *sysfs_schemes)
|
|
{
|
|
struct damos *scheme, *next;
|
|
int i = 0;
|
|
|
|
damon_for_each_scheme_safe(scheme, next, ctx) {
|
|
if (i < sysfs_schemes->nr)
|
|
damon_sysfs_update_scheme(scheme,
|
|
sysfs_schemes->schemes_arr[i]);
|
|
else
|
|
damon_destroy_scheme(scheme);
|
|
i++;
|
|
}
|
|
|
|
for (; i < sysfs_schemes->nr; i++) {
|
|
struct damos *scheme, *next;
|
|
|
|
scheme = damon_sysfs_mk_scheme(sysfs_schemes->schemes_arr[i]);
|
|
if (!scheme) {
|
|
damon_for_each_scheme_safe(scheme, next, ctx)
|
|
damon_destroy_scheme(scheme);
|
|
return -ENOMEM;
|
|
}
|
|
damon_add_scheme(ctx, scheme);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void damon_sysfs_schemes_update_stats(
|
|
struct damon_sysfs_schemes *sysfs_schemes,
|
|
struct damon_ctx *ctx)
|
|
{
|
|
struct damos *scheme;
|
|
int schemes_idx = 0;
|
|
|
|
damon_for_each_scheme(scheme, ctx) {
|
|
struct damon_sysfs_stats *sysfs_stats;
|
|
|
|
/* user could have removed the scheme sysfs dir */
|
|
if (schemes_idx >= sysfs_schemes->nr)
|
|
break;
|
|
|
|
sysfs_stats = sysfs_schemes->schemes_arr[schemes_idx++]->stats;
|
|
sysfs_stats->nr_tried = scheme->stat.nr_tried;
|
|
sysfs_stats->sz_tried = scheme->stat.sz_tried;
|
|
sysfs_stats->nr_applied = scheme->stat.nr_applied;
|
|
sysfs_stats->sz_applied = scheme->stat.sz_applied;
|
|
sysfs_stats->qt_exceeds = scheme->stat.qt_exceeds;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* damon_sysfs_schemes that need to update its schemes regions dir. Protected
|
|
* by damon_sysfs_lock
|
|
*/
|
|
static struct damon_sysfs_schemes *damon_sysfs_schemes_for_damos_callback;
|
|
static int damon_sysfs_schemes_region_idx;
|
|
|
|
/*
|
|
* DAMON callback that called before damos apply. While this callback is
|
|
* registered, damon_sysfs_lock should be held to ensure the regions
|
|
* directories exist.
|
|
*/
|
|
static int damon_sysfs_before_damos_apply(struct damon_ctx *ctx,
|
|
struct damon_target *t, struct damon_region *r,
|
|
struct damos *s)
|
|
{
|
|
struct damos *scheme;
|
|
struct damon_sysfs_scheme_regions *sysfs_regions;
|
|
struct damon_sysfs_scheme_region *region;
|
|
struct damon_sysfs_schemes *sysfs_schemes =
|
|
damon_sysfs_schemes_for_damos_callback;
|
|
int schemes_idx = 0;
|
|
|
|
damon_for_each_scheme(scheme, ctx) {
|
|
if (scheme == s)
|
|
break;
|
|
schemes_idx++;
|
|
}
|
|
|
|
/* user could have removed the scheme sysfs dir */
|
|
if (schemes_idx >= sysfs_schemes->nr)
|
|
return 0;
|
|
|
|
sysfs_regions = sysfs_schemes->schemes_arr[schemes_idx]->tried_regions;
|
|
region = damon_sysfs_scheme_region_alloc(r);
|
|
list_add_tail(®ion->list, &sysfs_regions->regions_list);
|
|
sysfs_regions->nr_regions++;
|
|
if (kobject_init_and_add(®ion->kobj,
|
|
&damon_sysfs_scheme_region_ktype,
|
|
&sysfs_regions->kobj, "%d",
|
|
damon_sysfs_schemes_region_idx++)) {
|
|
kobject_put(®ion->kobj);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Called from damon_sysfs_cmd_request_callback under damon_sysfs_lock */
|
|
int damon_sysfs_schemes_clear_regions(
|
|
struct damon_sysfs_schemes *sysfs_schemes,
|
|
struct damon_ctx *ctx)
|
|
{
|
|
struct damos *scheme;
|
|
int schemes_idx = 0;
|
|
|
|
damon_for_each_scheme(scheme, ctx) {
|
|
struct damon_sysfs_scheme *sysfs_scheme;
|
|
|
|
/* user could have removed the scheme sysfs dir */
|
|
if (schemes_idx >= sysfs_schemes->nr)
|
|
break;
|
|
|
|
sysfs_scheme = sysfs_schemes->schemes_arr[schemes_idx++];
|
|
damon_sysfs_scheme_regions_rm_dirs(
|
|
sysfs_scheme->tried_regions);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Called from damon_sysfs_cmd_request_callback under damon_sysfs_lock */
|
|
int damon_sysfs_schemes_update_regions_start(
|
|
struct damon_sysfs_schemes *sysfs_schemes,
|
|
struct damon_ctx *ctx)
|
|
{
|
|
damon_sysfs_schemes_clear_regions(sysfs_schemes, ctx);
|
|
damon_sysfs_schemes_for_damos_callback = sysfs_schemes;
|
|
ctx->callback.before_damos_apply = damon_sysfs_before_damos_apply;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Called from damon_sysfs_cmd_request_callback under damon_sysfs_lock. Caller
|
|
* should unlock damon_sysfs_lock which held before
|
|
* damon_sysfs_schemes_update_regions_start()
|
|
*/
|
|
int damon_sysfs_schemes_update_regions_stop(struct damon_ctx *ctx)
|
|
{
|
|
damon_sysfs_schemes_for_damos_callback = NULL;
|
|
ctx->callback.before_damos_apply = NULL;
|
|
damon_sysfs_schemes_region_idx = 0;
|
|
return 0;
|
|
}
|