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Merge branch 'akpm' (patches from Andrew)

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Merge fixes from Andrew Morton:
 "20 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  rapidio/rio_cm: avoid GFP_KERNEL in atomic context
  Revert "ocfs2: bump up o2cb network protocol version"
  ocfs2: fix start offset to ocfs2_zero_range_for_truncate()
  cgroup: duplicate cgroup reference when cloning sockets
  mm: memcontrol: make per-cpu charge cache IRQ-safe for socket accounting
  ocfs2: fix double unlock in case retry after free truncate log
  fanotify: fix list corruption in fanotify_get_response()
  fsnotify: add a way to stop queueing events on group shutdown
  ocfs2: fix trans extend while free cached blocks
  ocfs2: fix trans extend while flush truncate log
  ipc/shm: fix crash if CONFIG_SHMEM is not set
  mm: fix the page_swap_info() BUG_ON check
  autofs: use dentry flags to block walks during expire
  MAINTAINERS: update email for VLYNQ bus entry
  mm: avoid endless recursion in dump_page()
  mm, thp: fix leaking mapped pte in __collapse_huge_page_swapin()
  khugepaged: fix use-after-free in collapse_huge_page()
  MAINTAINERS: Maik has moved
  ocfs2/dlm: fix race between convert and migration
  mem-hotplug: don't clear the only node in new_node_page()
This commit is contained in:
Linus Torvalds 2016-09-19 16:08:03 -07:00
commit d2ffb0103a
22 changed files with 240 additions and 146 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
MAINTAINERS
View File

@ -6103,7 +6103,7 @@ S: Supported
F: drivers/cpufreq/intel_pstate.c
INTEL FRAMEBUFFER DRIVER (excluding 810 and 815)
M: Maik Broemme <mbroemme@plusserver.de>
M: Maik Broemme <mbroemme@libmpq.org>
L: linux-fbdev@vger.kernel.org
S: Maintained
F: Documentation/fb/intelfb.txt
@ -12569,7 +12569,7 @@ F: include/linux/if_*vlan.h
F: net/8021q/
VLYNQ BUS
M: Florian Fainelli <florian@openwrt.org>
M: Florian Fainelli <f.fainelli@gmail.com>
L: openwrt-devel@lists.openwrt.org (subscribers-only)
S: Maintained
F: drivers/vlynq/vlynq.c

19
drivers/rapidio/rio_cm.c
View File

@ -2247,17 +2247,30 @@ static int rio_cm_shutdown(struct notifier_block *nb, unsigned long code,
{
struct rio_channel *ch;
unsigned int i;
LIST_HEAD(list);
riocm_debug(EXIT, ".");
/*
* If there are any channels left in connected state send
* close notification to the connection partner.
* First build a list of channels that require a closing
* notification because function riocm_send_close() should
* be called outside of spinlock protected code.
*/
spin_lock_bh(&idr_lock);
idr_for_each_entry(&ch_idr, ch, i) {
riocm_debug(EXIT, "close ch %d", ch->id);
if (ch->state == RIO_CM_CONNECTED)
riocm_send_close(ch);
if (ch->state == RIO_CM_CONNECTED) {
riocm_debug(EXIT, "close ch %d", ch->id);
idr_remove(&ch_idr, ch->id);
list_add(&ch->ch_node, &list);
}
}
spin_unlock_bh(&idr_lock);
list_for_each_entry(ch, &list, ch_node)
riocm_send_close(ch);
return NOTIFY_DONE;
}

55
fs/autofs4/expire.c
View File

@ -417,6 +417,7 @@ static struct dentry *should_expire(struct dentry *dentry,
}
return NULL;
}
/*
* Find an eligible tree to time-out
* A tree is eligible if :-
@ -432,6 +433,7 @@ struct dentry *autofs4_expire_indirect(struct super_block *sb,
struct dentry *root = sb->s_root;
struct dentry *dentry;
struct dentry *expired;
struct dentry *found;
struct autofs_info *ino;
if (!root)
@ -442,31 +444,46 @@ struct dentry *autofs4_expire_indirect(struct super_block *sb,
dentry = NULL;
while ((dentry = get_next_positive_subdir(dentry, root))) {
int flags = how;
spin_lock(&sbi->fs_lock);
ino = autofs4_dentry_ino(dentry);
if (ino->flags & AUTOFS_INF_WANT_EXPIRE)
expired = NULL;
else
expired = should_expire(dentry, mnt, timeout, how);
if (!expired) {
if (ino->flags & AUTOFS_INF_WANT_EXPIRE) {
spin_unlock(&sbi->fs_lock);
continue;
}
spin_unlock(&sbi->fs_lock);
expired = should_expire(dentry, mnt, timeout, flags);
if (!expired)
continue;
spin_lock(&sbi->fs_lock);
ino = autofs4_dentry_ino(expired);
ino->flags |= AUTOFS_INF_WANT_EXPIRE;
spin_unlock(&sbi->fs_lock);
synchronize_rcu();
spin_lock(&sbi->fs_lock);
if (should_expire(expired, mnt, timeout, how)) {
if (expired != dentry)
dput(dentry);
goto found;
}
/* Make sure a reference is not taken on found if
* things have changed.
*/
flags &= ~AUTOFS_EXP_LEAVES;
found = should_expire(expired, mnt, timeout, how);
if (!found || found != expired)
/* Something has changed, continue */
goto next;
if (expired != dentry)
dput(dentry);
spin_lock(&sbi->fs_lock);
goto found;
next:
spin_lock(&sbi->fs_lock);
ino->flags &= ~AUTOFS_INF_WANT_EXPIRE;
spin_unlock(&sbi->fs_lock);
if (expired != dentry)
dput(expired);
spin_unlock(&sbi->fs_lock);
}
return NULL;
@ -483,6 +500,7 @@ int autofs4_expire_wait(struct dentry *dentry, int rcu_walk)
struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb);
struct autofs_info *ino = autofs4_dentry_ino(dentry);
int status;
int state;
/* Block on any pending expire */
if (!(ino->flags & AUTOFS_INF_WANT_EXPIRE))
@ -490,8 +508,19 @@ int autofs4_expire_wait(struct dentry *dentry, int rcu_walk)
if (rcu_walk)
return -ECHILD;
retry:
spin_lock(&sbi->fs_lock);
if (ino->flags & AUTOFS_INF_EXPIRING) {
state = ino->flags & (AUTOFS_INF_WANT_EXPIRE | AUTOFS_INF_EXPIRING);
if (state == AUTOFS_INF_WANT_EXPIRE) {
spin_unlock(&sbi->fs_lock);
/*
* Possibly being selected for expire, wait until
* it's selected or not.
*/
schedule_timeout_uninterruptible(HZ/10);
goto retry;
}
if (state & AUTOFS_INF_EXPIRING) {
spin_unlock(&sbi->fs_lock);
pr_debug("waiting for expire %p name=%pd\n", dentry, dentry);

13
fs/notify/fanotify/fanotify.c
View File

@ -67,18 +67,7 @@ static int fanotify_get_response(struct fsnotify_group *group,
pr_debug("%s: group=%p event=%p\n", __func__, group, event);
wait_event(group->fanotify_data.access_waitq, event->response ||
atomic_read(&group->fanotify_data.bypass_perm));
if (!event->response) { /* bypass_perm set */
/*
* Event was canceled because group is being destroyed. Remove
* it from group's event list because we are responsible for
* freeing the permission event.
*/
fsnotify_remove_event(group, &event->fae.fse);
return 0;
}
wait_event(group->fanotify_data.access_waitq, event->response);
/* userspace responded, convert to something usable */
switch (event->response) {

36
fs/notify/fanotify/fanotify_user.c
View File

@ -358,16 +358,20 @@ static int fanotify_release(struct inode *ignored, struct file *file)
#ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS
struct fanotify_perm_event_info *event, *next;
struct fsnotify_event *fsn_event;
/*
* There may be still new events arriving in the notification queue
* but since userspace cannot use fanotify fd anymore, no event can
* enter or leave access_list by now.
* Stop new events from arriving in the notification queue. since
* userspace cannot use fanotify fd anymore, no event can enter or
* leave access_list by now either.
*/
fsnotify_group_stop_queueing(group);
/*
* Process all permission events on access_list and notification queue
* and simulate reply from userspace.
*/
spin_lock(&group->fanotify_data.access_lock);
atomic_inc(&group->fanotify_data.bypass_perm);
list_for_each_entry_safe(event, next, &group->fanotify_data.access_list,
fae.fse.list) {
pr_debug("%s: found group=%p event=%p\n", __func__, group,
@ -379,12 +383,21 @@ static int fanotify_release(struct inode *ignored, struct file *file)
spin_unlock(&group->fanotify_data.access_lock);
/*
* Since bypass_perm is set, newly queued events will not wait for
* access response. Wake up the already sleeping ones now.
* synchronize_srcu() in fsnotify_destroy_group() will wait for all
* processes sleeping in fanotify_handle_event() waiting for access
* response and thus also for all permission events to be freed.
* Destroy all non-permission events. For permission events just
* dequeue them and set the response. They will be freed once the
* response is consumed and fanotify_get_response() returns.
*/
mutex_lock(&group->notification_mutex);
while (!fsnotify_notify_queue_is_empty(group)) {
fsn_event = fsnotify_remove_first_event(group);
if (!(fsn_event->mask & FAN_ALL_PERM_EVENTS))
fsnotify_destroy_event(group, fsn_event);
else
FANOTIFY_PE(fsn_event)->response = FAN_ALLOW;
}
mutex_unlock(&group->notification_mutex);
/* Response for all permission events it set, wakeup waiters */
wake_up(&group->fanotify_data.access_waitq);
#endif
@ -755,7 +768,6 @@ SYSCALL_DEFINE2(fanotify_init, unsigned int, flags, unsigned int, event_f_flags)
spin_lock_init(&group->fanotify_data.access_lock);
init_waitqueue_head(&group->fanotify_data.access_waitq);
INIT_LIST_HEAD(&group->fanotify_data.access_list);
atomic_set(&group->fanotify_data.bypass_perm, 0);
#endif
switch (flags & FAN_ALL_CLASS_BITS) {
case FAN_CLASS_NOTIF:

19
fs/notify/group.c
View File

@ -39,6 +39,17 @@ static void fsnotify_final_destroy_group(struct fsnotify_group *group)
kfree(group);
}
/*
* Stop queueing new events for this group. Once this function returns
* fsnotify_add_event() will not add any new events to the group's queue.
*/
void fsnotify_group_stop_queueing(struct fsnotify_group *group)
{
mutex_lock(&group->notification_mutex);
group->shutdown = true;
mutex_unlock(&group->notification_mutex);
}
/*
* Trying to get rid of a group. Remove all marks, flush all events and release
* the group reference.
@ -47,6 +58,14 @@ static void fsnotify_final_destroy_group(struct fsnotify_group *group)
*/
void fsnotify_destroy_group(struct fsnotify_group *group)
{
/*
* Stop queueing new events. The code below is careful enough to not
* require this but fanotify needs to stop queuing events even before
* fsnotify_destroy_group() is called and this makes the other callers
* of fsnotify_destroy_group() to see the same behavior.
*/
fsnotify_group_stop_queueing(group);
/* clear all inode marks for this group, attach them to destroy_list */
fsnotify_detach_group_marks(group);

23
fs/notify/notification.c
View File

@ -82,7 +82,8 @@ void fsnotify_destroy_event(struct fsnotify_group *group,
* Add an event to the group notification queue. The group can later pull this
* event off the queue to deal with. The function returns 0 if the event was
* added to the queue, 1 if the event was merged with some other queued event,
* 2 if the queue of events has overflown.
* 2 if the event was not queued - either the queue of events has overflown
* or the group is shutting down.
*/
int fsnotify_add_event(struct fsnotify_group *group,
struct fsnotify_event *event,
@ -96,6 +97,11 @@ int fsnotify_add_event(struct fsnotify_group *group,
mutex_lock(&group->notification_mutex);
if (group->shutdown) {
mutex_unlock(&group->notification_mutex);
return 2;
}
if (group->q_len >= group->max_events) {
ret = 2;
/* Queue overflow event only if it isn't already queued */
@ -125,21 +131,6 @@ queue:
return ret;
}
/*
* Remove @event from group's notification queue. It is the responsibility of
* the caller to destroy the event.
*/
void fsnotify_remove_event(struct fsnotify_group *group,
struct fsnotify_event *event)
{
mutex_lock(&group->notification_mutex);
if (!list_empty(&event->list)) {
list_del_init(&event->list);
group->q_len--;
}
mutex_unlock(&group->notification_mutex);
}
/*
* Remove and return the first event from the notification list. It is the
* responsibility of the caller to destroy the obtained event

56
fs/ocfs2/alloc.c
View File

@ -5922,7 +5922,6 @@ bail:
}
static int ocfs2_replay_truncate_records(struct ocfs2_super *osb,
handle_t *handle,
struct inode *data_alloc_inode,
struct buffer_head *data_alloc_bh)
{
@ -5935,11 +5934,19 @@ static int ocfs2_replay_truncate_records(struct ocfs2_super *osb,
struct ocfs2_truncate_log *tl;
struct inode *tl_inode = osb->osb_tl_inode;
struct buffer_head *tl_bh = osb->osb_tl_bh;
handle_t *handle;
di = (struct ocfs2_dinode *) tl_bh->b_data;
tl = &di->id2.i_dealloc;
i = le16_to_cpu(tl->tl_used) - 1;
while (i >= 0) {
handle = ocfs2_start_trans(osb, OCFS2_TRUNCATE_LOG_FLUSH_ONE_REC);
if (IS_ERR(handle)) {
status = PTR_ERR(handle);
mlog_errno(status);
goto bail;
}
/* Caller has given us at least enough credits to
* update the truncate log dinode */
status = ocfs2_journal_access_di(handle, INODE_CACHE(tl_inode), tl_bh,
@ -5974,12 +5981,7 @@ static int ocfs2_replay_truncate_records(struct ocfs2_super *osb,
}
}
status = ocfs2_extend_trans(handle,
OCFS2_TRUNCATE_LOG_FLUSH_ONE_REC);
if (status < 0) {
mlog_errno(status);
goto bail;
}
ocfs2_commit_trans(osb, handle);
i--;
}
@ -5994,7 +5996,6 @@ int __ocfs2_flush_truncate_log(struct ocfs2_super *osb)
{
int status;
unsigned int num_to_flush;
handle_t *handle;
struct inode *tl_inode = osb->osb_tl_inode;
struct inode *data_alloc_inode = NULL;
struct buffer_head *tl_bh = osb->osb_tl_bh;
@ -6038,21 +6039,11 @@ int __ocfs2_flush_truncate_log(struct ocfs2_super *osb)
goto out_mutex;
}
handle = ocfs2_start_trans(osb, OCFS2_TRUNCATE_LOG_FLUSH_ONE_REC);
if (IS_ERR(handle)) {
status = PTR_ERR(handle);
mlog_errno(status);
goto out_unlock;
}
status = ocfs2_replay_truncate_records(osb, handle, data_alloc_inode,
status = ocfs2_replay_truncate_records(osb, data_alloc_inode,
data_alloc_bh);
if (status < 0)
mlog_errno(status);
ocfs2_commit_trans(osb, handle);
out_unlock:
brelse(data_alloc_bh);
ocfs2_inode_unlock(data_alloc_inode, 1);
@ -6413,43 +6404,34 @@ static int ocfs2_free_cached_blocks(struct ocfs2_super *osb,
goto out_mutex;
}
handle = ocfs2_start_trans(osb, OCFS2_SUBALLOC_FREE);
if (IS_ERR(handle)) {
ret = PTR_ERR(handle);
mlog_errno(ret);
goto out_unlock;
}
while (head) {
if (head->free_bg)
bg_blkno = head->free_bg;
else
bg_blkno = ocfs2_which_suballoc_group(head->free_blk,
head->free_bit);
handle = ocfs2_start_trans(osb, OCFS2_SUBALLOC_FREE);
if (IS_ERR(handle)) {
ret = PTR_ERR(handle);
mlog_errno(ret);
goto out_unlock;
}
trace_ocfs2_free_cached_blocks(
(unsigned long long)head->free_blk, head->free_bit);
ret = ocfs2_free_suballoc_bits(handle, inode, di_bh,
head->free_bit, bg_blkno, 1);
if (ret) {
if (ret)
mlog_errno(ret);
goto out_journal;
}
ret = ocfs2_extend_trans(handle, OCFS2_SUBALLOC_FREE);
if (ret) {
mlog_errno(ret);
goto out_journal;
}
ocfs2_commit_trans(osb, handle);
tmp = head;
head = head->free_next;
kfree(tmp);
}
out_journal:
ocfs2_commit_trans(osb, handle);
out_unlock:
ocfs2_inode_unlock(inode, 1);
brelse(di_bh);

5
fs/ocfs2/cluster/tcp_internal.h
View File

@ -44,9 +44,6 @@
* version here in tcp_internal.h should not need to be bumped for
* filesystem locking changes.
*
* New in version 12
* - Negotiate hb timeout when storage is down.
*
* New in version 11
* - Negotiation of filesystem locking in the dlm join.
*
@ -78,7 +75,7 @@
* - full 64 bit i_size in the metadata lock lvbs
* - introduction of "rw" lock and pushing meta/data locking down
*/
#define O2NET_PROTOCOL_VERSION 12ULL
#define O2NET_PROTOCOL_VERSION 11ULL
struct o2net_handshake {
__be64 protocol_version;
__be64 connector_id;

12
fs/ocfs2/dlm/dlmconvert.c
View File

@ -268,7 +268,6 @@ enum dlm_status dlmconvert_remote(struct dlm_ctxt *dlm,
struct dlm_lock *lock, int flags, int type)
{
enum dlm_status status;
u8 old_owner = res->owner;
mlog(0, "type=%d, convert_type=%d, busy=%d\n", lock->ml.type,
lock->ml.convert_type, res->state & DLM_LOCK_RES_IN_PROGRESS);
@ -335,7 +334,6 @@ enum dlm_status dlmconvert_remote(struct dlm_ctxt *dlm,
spin_lock(&res->spinlock);
res->state &= ~DLM_LOCK_RES_IN_PROGRESS;
lock->convert_pending = 0;
/* if it failed, move it back to granted queue.
* if master returns DLM_NORMAL and then down before sending ast,
* it may have already been moved to granted queue, reset to
@ -344,12 +342,14 @@ enum dlm_status dlmconvert_remote(struct dlm_ctxt *dlm,
if (status != DLM_NOTQUEUED)
dlm_error(status);
dlm_revert_pending_convert(res, lock);
} else if ((res->state & DLM_LOCK_RES_RECOVERING) ||
(old_owner != res->owner)) {
mlog(0, "res %.*s is in recovering or has been recovered.\n",
res->lockname.len, res->lockname.name);
} else if (!lock->convert_pending) {
mlog(0, "%s: res %.*s, owner died and lock has been moved back "
"to granted list, retry convert.\n",
dlm->name, res->lockname.len, res->lockname.name);
status = DLM_RECOVERING;
}
lock->convert_pending = 0;
bail:
spin_unlock(&res->spinlock);

34
fs/ocfs2/file.c
View File

@ -1506,7 +1506,8 @@ static int ocfs2_zero_partial_clusters(struct inode *inode,
u64 start, u64 len)
{
int ret = 0;
u64 tmpend, end = start + len;
u64 tmpend = 0;
u64 end = start + len;
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
unsigned int csize = osb->s_clustersize;
handle_t *handle;
@ -1538,18 +1539,31 @@ static int ocfs2_zero_partial_clusters(struct inode *inode,
}
/*
* We want to get the byte offset of the end of the 1st cluster.
* If start is on a cluster boundary and end is somewhere in another
* cluster, we have not COWed the cluster starting at start, unless
* end is also within the same cluster. So, in this case, we skip this
* first call to ocfs2_zero_range_for_truncate() truncate and move on
* to the next one.
*/
tmpend = (u64)osb->s_clustersize + (start & ~(osb->s_clustersize - 1));
if (tmpend > end)
tmpend = end;
if ((start & (csize - 1)) != 0) {
/*
* We want to get the byte offset of the end of the 1st
* cluster.
*/
tmpend = (u64)osb->s_clustersize +
(start & ~(osb->s_clustersize - 1));
if (tmpend > end)
tmpend = end;
trace_ocfs2_zero_partial_clusters_range1((unsigned long long)start,
(unsigned long long)tmpend);
trace_ocfs2_zero_partial_clusters_range1(
(unsigned long long)start,
(unsigned long long)tmpend);
ret = ocfs2_zero_range_for_truncate(inode, handle, start, tmpend);
if (ret)
mlog_errno(ret);
ret = ocfs2_zero_range_for_truncate(inode, handle, start,
tmpend);
if (ret)
mlog_errno(ret);
}
if (tmpend < end) {
/*

14
fs/ocfs2/suballoc.c
View File

@ -1199,14 +1199,24 @@ retry:
inode_unlock((*ac)->ac_inode);
ret = ocfs2_try_to_free_truncate_log(osb, bits_wanted);
if (ret == 1)
if (ret == 1) {
iput((*ac)->ac_inode);
(*ac)->ac_inode = NULL;
goto retry;
}
if (ret < 0)
mlog_errno(ret);
inode_lock((*ac)->ac_inode);
ocfs2_inode_lock((*ac)->ac_inode, NULL, 1);
ret = ocfs2_inode_lock((*ac)->ac_inode, NULL, 1);
if (ret < 0) {
mlog_errno(ret);
inode_unlock((*ac)->ac_inode);
iput((*ac)->ac_inode);
(*ac)->ac_inode = NULL;
goto bail;
}
}
if (status < 0) {
if (status != -ENOSPC)

9
fs/ramfs/file-mmu.c
View File

@ -27,9 +27,17 @@
#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/ramfs.h>
#include <linux/sched.h>
#include "internal.h"
static unsigned long ramfs_mmu_get_unmapped_area(struct file *file,
unsigned long addr, unsigned long len, unsigned long pgoff,
unsigned long flags)
{
return current->mm->get_unmapped_area(file, addr, len, pgoff, flags);
}
const struct file_operations ramfs_file_operations = {
.read_iter = generic_file_read_iter,
.write_iter = generic_file_write_iter,
@ -38,6 +46,7 @@ const struct file_operations ramfs_file_operations = {
.splice_read = generic_file_splice_read,
.splice_write = iter_file_splice_write,
.llseek = generic_file_llseek,
.get_unmapped_area = ramfs_mmu_get_unmapped_area,
};
const struct inode_operations ramfs_file_inode_operations = {

6
include/linux/fsnotify_backend.h
View File

@ -148,6 +148,7 @@ struct fsnotify_group {
#define FS_PRIO_1 1 /* fanotify content based access control */
#define FS_PRIO_2 2 /* fanotify pre-content access */
unsigned int priority;
bool shutdown; /* group is being shut down, don't queue more events */
/* stores all fastpath marks assoc with this group so they can be cleaned on unregister */
struct mutex mark_mutex; /* protect marks_list */
@ -179,7 +180,6 @@ struct fsnotify_group {
spinlock_t access_lock;
struct list_head access_list;
wait_queue_head_t access_waitq;
atomic_t bypass_perm;
#endif /* CONFIG_FANOTIFY_ACCESS_PERMISSIONS */
int f_flags;
unsigned int max_marks;
@ -292,6 +292,8 @@ extern struct fsnotify_group *fsnotify_alloc_group(const struct fsnotify_ops *op
extern void fsnotify_get_group(struct fsnotify_group *group);
/* drop reference on a group from fsnotify_alloc_group */
extern void fsnotify_put_group(struct fsnotify_group *group);
/* group destruction begins, stop queuing new events */
extern void fsnotify_group_stop_queueing(struct fsnotify_group *group);
/* destroy group */
extern void fsnotify_destroy_group(struct fsnotify_group *group);
/* fasync handler function */
@ -304,8 +306,6 @@ extern int fsnotify_add_event(struct fsnotify_group *group,
struct fsnotify_event *event,
int (*merge)(struct list_head *,
struct fsnotify_event *));
/* Remove passed event from groups notification queue */
extern void fsnotify_remove_event(struct fsnotify_group *group, struct fsnotify_event *event);
/* true if the group notification queue is empty */
extern bool fsnotify_notify_queue_is_empty(struct fsnotify_group *group);
/* return, but do not dequeue the first event on the notification queue */

6
kernel/cgroup.c
View File

@ -6270,6 +6270,12 @@ void cgroup_sk_alloc(struct sock_cgroup_data *skcd)
if (cgroup_sk_alloc_disabled)
return;
/* Socket clone path */
if (skcd->val) {
cgroup_get(sock_cgroup_ptr(skcd));
return;
}
rcu_read_lock();
while (true) {

6
mm/debug.c
View File

@ -42,9 +42,11 @@ const struct trace_print_flags vmaflag_names[] = {
void __dump_page(struct page *page, const char *reason)
{
int mapcount = PageSlab(page) ? 0 : page_mapcount(page);
pr_emerg("page:%p count:%d mapcount:%d mapping:%p index:%#lx",
page, page_ref_count(page), page_mapcount(page),
page->mapping, page->index);
page, page_ref_count(page), mapcount,
page->mapping, page_to_pgoff(page));
if (PageCompound(page))
pr_cont(" compound_mapcount: %d", compound_mapcount(page));
pr_cont("\n");

25
mm/khugepaged.c
View File

@ -838,7 +838,8 @@ static bool hugepage_vma_check(struct vm_area_struct *vma)
* value (scan code).
*/
static int hugepage_vma_revalidate(struct mm_struct *mm, unsigned long address)
static int hugepage_vma_revalidate(struct mm_struct *mm, unsigned long address,
struct vm_area_struct **vmap)
{
struct vm_area_struct *vma;
unsigned long hstart, hend;
@ -846,7 +847,7 @@ static int hugepage_vma_revalidate(struct mm_struct *mm, unsigned long address)
if (unlikely(khugepaged_test_exit(mm)))
return SCAN_ANY_PROCESS;
vma = find_vma(mm, address);
*vmap = vma = find_vma(mm, address);
if (!vma)
return SCAN_VMA_NULL;
@ -881,6 +882,11 @@ static bool __collapse_huge_page_swapin(struct mm_struct *mm,
.pmd = pmd,
};
/* we only decide to swapin, if there is enough young ptes */
if (referenced < HPAGE_PMD_NR/2) {
trace_mm_collapse_huge_page_swapin(mm, swapped_in, referenced, 0);
return false;
}
fe.pte = pte_offset_map(pmd, address);
for (; fe.address < address + HPAGE_PMD_NR*PAGE_SIZE;
fe.pte++, fe.address += PAGE_SIZE) {
@ -888,17 +894,12 @@ static bool __collapse_huge_page_swapin(struct mm_struct *mm,
if (!is_swap_pte(pteval))
continue;
swapped_in++;
/* we only decide to swapin, if there is enough young ptes */
if (referenced < HPAGE_PMD_NR/2) {
trace_mm_collapse_huge_page_swapin(mm, swapped_in, referenced, 0);
return false;
}
ret = do_swap_page(&fe, pteval);
/* do_swap_page returns VM_FAULT_RETRY with released mmap_sem */
if (ret & VM_FAULT_RETRY) {
down_read(&mm->mmap_sem);
if (hugepage_vma_revalidate(mm, address)) {
if (hugepage_vma_revalidate(mm, address, &fe.vma)) {
/* vma is no longer available, don't continue to swapin */
trace_mm_collapse_huge_page_swapin(mm, swapped_in, referenced, 0);
return false;
@ -923,7 +924,6 @@ static bool __collapse_huge_page_swapin(struct mm_struct *mm,
static void collapse_huge_page(struct mm_struct *mm,
unsigned long address,
struct page **hpage,
struct vm_area_struct *vma,
int node, int referenced)
{
pmd_t *pmd, _pmd;
@ -933,6 +933,7 @@ static void collapse_huge_page(struct mm_struct *mm,
spinlock_t *pmd_ptl, *pte_ptl;
int isolated = 0, result = 0;
struct mem_cgroup *memcg;
struct vm_area_struct *vma;
unsigned long mmun_start; /* For mmu_notifiers */
unsigned long mmun_end; /* For mmu_notifiers */
gfp_t gfp;
@ -961,7 +962,7 @@ static void collapse_huge_page(struct mm_struct *mm,
}
down_read(&mm->mmap_sem);
result = hugepage_vma_revalidate(mm, address);
result = hugepage_vma_revalidate(mm, address, &vma);
if (result) {
mem_cgroup_cancel_charge(new_page, memcg, true);
up_read(&mm->mmap_sem);
@ -994,7 +995,7 @@ static void collapse_huge_page(struct mm_struct *mm,
* handled by the anon_vma lock + PG_lock.
*/
down_write(&mm->mmap_sem);
result = hugepage_vma_revalidate(mm, address);
result = hugepage_vma_revalidate(mm, address, &vma);
if (result)
goto out;
/* check if the pmd is still valid */
@ -1202,7 +1203,7 @@ out_unmap:
if (ret) {
node = khugepaged_find_target_node();
/* collapse_huge_page will return with the mmap_sem released */
collapse_huge_page(mm, address, hpage, vma, node, referenced);
collapse_huge_page(mm, address, hpage, node, referenced);
}
out:
trace_mm_khugepaged_scan_pmd(mm, page, writable, referenced,

31
mm/memcontrol.c
View File

@ -1740,17 +1740,22 @@ static DEFINE_MUTEX(percpu_charge_mutex);
static bool consume_stock(struct mem_cgroup *memcg, unsigned int nr_pages)
{
struct memcg_stock_pcp *stock;
unsigned long flags;
bool ret = false;
if (nr_pages > CHARGE_BATCH)
return ret;
stock = &get_cpu_var(memcg_stock);
local_irq_save(flags);
stock = this_cpu_ptr(&memcg_stock);
if (memcg == stock->cached && stock->nr_pages >= nr_pages) {
stock->nr_pages -= nr_pages;
ret = true;
}
put_cpu_var(memcg_stock);
local_irq_restore(flags);
return ret;
}
@ -1771,15 +1776,18 @@ static void drain_stock(struct memcg_stock_pcp *stock)
stock->cached = NULL;
}
/*
* This must be called under preempt disabled or must be called by
* a thread which is pinned to local cpu.
*/
static void drain_local_stock(struct work_struct *dummy)
{
struct memcg_stock_pcp *stock = this_cpu_ptr(&memcg_stock);
struct memcg_stock_pcp *stock;
unsigned long flags;
local_irq_save(flags);
stock = this_cpu_ptr(&memcg_stock);
drain_stock(stock);
clear_bit(FLUSHING_CACHED_CHARGE, &stock->flags);
local_irq_restore(flags);
}
/*
@ -1788,14 +1796,19 @@ static void drain_local_stock(struct work_struct *dummy)
*/
static void refill_stock(struct mem_cgroup *memcg, unsigned int nr_pages)
{
struct memcg_stock_pcp *stock = &get_cpu_var(memcg_stock);
struct memcg_stock_pcp *stock;
unsigned long flags;
local_irq_save(flags);
stock = this_cpu_ptr(&memcg_stock);
if (stock->cached != memcg) { /* reset if necessary */
drain_stock(stock);
stock->cached = memcg;
}
stock->nr_pages += nr_pages;
put_cpu_var(memcg_stock);
local_irq_restore(flags);
}
/*

4
mm/memory_hotplug.c
View File

@ -1567,7 +1567,9 @@ static struct page *new_node_page(struct page *page, unsigned long private,
return alloc_huge_page_node(page_hstate(compound_head(page)),
next_node_in(nid, nmask));
node_clear(nid, nmask);
if (nid != next_node_in(nid, nmask))
node_clear(nid, nmask);
if (PageHighMem(page)
|| (zone_idx(page_zone(page)) == ZONE_MOVABLE))
gfp_mask |= __GFP_HIGHMEM;

3
mm/page_io.c
View File

@ -264,6 +264,7 @@ int __swap_writepage(struct page *page, struct writeback_control *wbc,
int ret;
struct swap_info_struct *sis = page_swap_info(page);
BUG_ON(!PageSwapCache(page));
if (sis->flags & SWP_FILE) {
struct kiocb kiocb;
struct file *swap_file = sis->swap_file;
@ -337,6 +338,7 @@ int swap_readpage(struct page *page)
int ret = 0;
struct swap_info_struct *sis = page_swap_info(page);
BUG_ON(!PageSwapCache(page));
VM_BUG_ON_PAGE(!PageLocked(page), page);
VM_BUG_ON_PAGE(PageUptodate(page), page);
if (frontswap_load(page) == 0) {
@ -386,6 +388,7 @@ int swap_set_page_dirty(struct page *page)
if (sis->flags & SWP_FILE) {
struct address_space *mapping = sis->swap_file->f_mapping;
BUG_ON(!PageSwapCache(page));
return mapping->a_ops->set_page_dirty(page);
} else {
return __set_page_dirty_no_writeback(page);

1
mm/swapfile.c
View File

@ -2724,7 +2724,6 @@ int swapcache_prepare(swp_entry_t entry)
struct swap_info_struct *page_swap_info(struct page *page)
{
swp_entry_t swap = { .val = page_private(page) };
BUG_ON(!PageSwapCache(page));
return swap_info[swp_type(swap)];
}

5
net/core/sock.c
View File

@ -1362,7 +1362,6 @@ static struct sock *sk_prot_alloc(struct proto *prot, gfp_t priority,
if (!try_module_get(prot->owner))
goto out_free_sec;
sk_tx_queue_clear(sk);
cgroup_sk_alloc(&sk->sk_cgrp_data);
}
return sk;
@ -1422,6 +1421,7 @@ struct sock *sk_alloc(struct net *net, int family, gfp_t priority,
sock_net_set(sk, net);
atomic_set(&sk->sk_wmem_alloc, 1);
cgroup_sk_alloc(&sk->sk_cgrp_data);
sock_update_classid(&sk->sk_cgrp_data);
sock_update_netprioidx(&sk->sk_cgrp_data);
}
@ -1566,6 +1566,9 @@ struct sock *sk_clone_lock(const struct sock *sk, const gfp_t priority)
newsk->sk_priority = 0;
newsk->sk_incoming_cpu = raw_smp_processor_id();
atomic64_set(&newsk->sk_cookie, 0);
cgroup_sk_alloc(&newsk->sk_cgrp_data);
/*
* Before updating sk_refcnt, we must commit prior changes to memory
* (Documentation/RCU/rculist_nulls.txt for details)