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blk-cgroup: cgroup changes for IOPS limit support

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o cgroup changes for IOPS throttling rules.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
This commit is contained in:
Vivek Goyal 2010-09-15 17:06:36 -04:00 committed by Jens Axboe
parent e43473b7f2
commit 7702e8f45b
2 changed files with 135 additions and 17 deletions
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139
block/blk-cgroup.c
View File

@ -149,6 +149,27 @@ static inline void blkio_update_group_bps(struct blkio_group *blkg, u64 bps,
}
}
static inline void blkio_update_group_iops(struct blkio_group *blkg,
unsigned int iops, int fileid)
{
struct blkio_policy_type *blkiop;
list_for_each_entry(blkiop, &blkio_list, list) {
/* If this policy does not own the blkg, do not send updates */
if (blkiop->plid != blkg->plid)
continue;
if (fileid == BLKIO_THROTL_read_iops_device
&& blkiop->ops.blkio_update_group_read_iops_fn)
blkiop->ops.blkio_update_group_read_iops_fn(blkg, iops);
if (fileid == BLKIO_THROTL_write_iops_device
&& blkiop->ops.blkio_update_group_write_iops_fn)
blkiop->ops.blkio_update_group_write_iops_fn(blkg,iops);
}
}
/*
* Add to the appropriate stat variable depending on the request type.
* This should be called with the blkg->stats_lock held.
@ -630,7 +651,7 @@ static int blkio_policy_parse_and_set(char *buf,
{
char *s[4], *p, *major_s = NULL, *minor_s = NULL;
int ret;
unsigned long major, minor, temp;
unsigned long major, minor, temp, iops;
int i = 0;
dev_t dev;
u64 bps;
@ -692,13 +713,28 @@ static int blkio_policy_parse_and_set(char *buf,
newpn->val.weight = temp;
break;
case BLKIO_POLICY_THROTL:
ret = strict_strtoull(s[1], 10, &bps);
if (ret)
return -EINVAL;
switch(fileid) {
case BLKIO_THROTL_read_bps_device:
case BLKIO_THROTL_write_bps_device:
ret = strict_strtoull(s[1], 10, &bps);
if (ret)
return -EINVAL;
newpn->plid = plid;
newpn->fileid = fileid;
newpn->val.bps = bps;
newpn->plid = plid;
newpn->fileid = fileid;
newpn->val.bps = bps;
break;
case BLKIO_THROTL_read_iops_device:
case BLKIO_THROTL_write_iops_device:
ret = strict_strtoul(s[1], 10, &iops);
if (ret)
return -EINVAL;
newpn->plid = plid;
newpn->fileid = fileid;
newpn->val.iops = iops;
break;
}
break;
default:
BUG();
@ -744,6 +780,29 @@ uint64_t blkcg_get_write_bps(struct blkio_cgroup *blkcg, dev_t dev)
return -1;
}
unsigned int blkcg_get_read_iops(struct blkio_cgroup *blkcg, dev_t dev)
{
struct blkio_policy_node *pn;
pn = blkio_policy_search_node(blkcg, dev, BLKIO_POLICY_THROTL,
BLKIO_THROTL_read_iops_device);
if (pn)
return pn->val.iops;
else
return -1;
}
unsigned int blkcg_get_write_iops(struct blkio_cgroup *blkcg, dev_t dev)
{
struct blkio_policy_node *pn;
pn = blkio_policy_search_node(blkcg, dev, BLKIO_POLICY_THROTL,
BLKIO_THROTL_write_iops_device);
if (pn)
return pn->val.iops;
else
return -1;
}
/* Checks whether user asked for deleting a policy rule */
static bool blkio_delete_rule_command(struct blkio_policy_node *pn)
{
@ -753,8 +812,17 @@ static bool blkio_delete_rule_command(struct blkio_policy_node *pn)
return 1;
break;
case BLKIO_POLICY_THROTL:
if (pn->val.bps == 0)
return 1;
switch(pn->fileid) {
case BLKIO_THROTL_read_bps_device:
case BLKIO_THROTL_write_bps_device:
if (pn->val.bps == 0)
return 1;
break;
case BLKIO_THROTL_read_iops_device:
case BLKIO_THROTL_write_iops_device:
if (pn->val.iops == 0)
return 1;
}
break;
default:
BUG();
@ -771,7 +839,15 @@ static void blkio_update_policy_rule(struct blkio_policy_node *oldpn,
oldpn->val.weight = newpn->val.weight;
break;
case BLKIO_POLICY_THROTL:
oldpn->val.bps = newpn->val.bps;
switch(newpn->fileid) {
case BLKIO_THROTL_read_bps_device:
case BLKIO_THROTL_write_bps_device:
oldpn->val.bps = newpn->val.bps;
break;
case BLKIO_THROTL_read_iops_device:
case BLKIO_THROTL_write_iops_device:
oldpn->val.iops = newpn->val.iops;
}
break;
default:
BUG();
@ -785,7 +861,7 @@ static void blkio_update_policy_rule(struct blkio_policy_node *oldpn,
static void blkio_update_blkg_policy(struct blkio_cgroup *blkcg,
struct blkio_group *blkg, struct blkio_policy_node *pn)
{
unsigned int weight;
unsigned int weight, iops;
u64 bps;
switch(pn->plid) {
@ -801,6 +877,11 @@ static void blkio_update_blkg_policy(struct blkio_cgroup *blkcg,
bps = pn->val.bps ? pn->val.bps : (-1);
blkio_update_group_bps(blkg, bps, pn->fileid);
break;
case BLKIO_THROTL_read_iops_device:
case BLKIO_THROTL_write_iops_device:
iops = pn->val.iops ? pn->val.iops : (-1);
blkio_update_group_iops(blkg, iops, pn->fileid);
break;
}
break;
default:
@ -900,14 +981,18 @@ blkio_print_policy_node(struct seq_file *m, struct blkio_policy_node *pn)
MINOR(pn->dev), pn->val.weight);
break;
case BLKIO_POLICY_THROTL:
if (pn->fileid == BLKIO_THROTL_read_bps_device)
switch(pn->fileid) {
case BLKIO_THROTL_read_bps_device:
case BLKIO_THROTL_write_bps_device:
seq_printf(m, "%u:%u\t%llu\n", MAJOR(pn->dev),
MINOR(pn->dev), pn->val.bps);
else if (pn->fileid == BLKIO_THROTL_write_bps_device)
seq_printf(m, "%u:%u\t%llu\n", MAJOR(pn->dev),
MINOR(pn->dev), pn->val.bps);
else
BUG();
break;
case BLKIO_THROTL_read_iops_device:
case BLKIO_THROTL_write_iops_device:
seq_printf(m, "%u:%u\t%u\n", MAJOR(pn->dev),
MINOR(pn->dev), pn->val.iops);
break;
}
break;
default:
BUG();
@ -954,6 +1039,8 @@ static int blkiocg_file_read(struct cgroup *cgrp, struct cftype *cft,
switch(name){
case BLKIO_THROTL_read_bps_device:
case BLKIO_THROTL_write_bps_device:
case BLKIO_THROTL_read_iops_device:
case BLKIO_THROTL_write_iops_device:
blkio_read_policy_node_files(cft, blkcg, m);
return 0;
default:
@ -1171,6 +1258,24 @@ struct cftype blkio_files[] = {
.write_string = blkiocg_file_write,
.max_write_len = 256,
},
{
.name = "throttle.read_iops_device",
.private = BLKIOFILE_PRIVATE(BLKIO_POLICY_THROTL,
BLKIO_THROTL_read_iops_device),
.read_seq_string = blkiocg_file_read,
.write_string = blkiocg_file_write,
.max_write_len = 256,
},
{
.name = "throttle.write_iops_device",
.private = BLKIOFILE_PRIVATE(BLKIO_POLICY_THROTL,
BLKIO_THROTL_write_iops_device),
.read_seq_string = blkiocg_file_read,
.write_string = blkiocg_file_write,
.max_write_len = 256,
},
{
.name = "time",
.private = BLKIOFILE_PRIVATE(BLKIO_POLICY_PROP,

13
block/blk-cgroup.h
View File

@ -93,6 +93,8 @@ enum blkcg_file_name_prop {
enum blkcg_file_name_throtl {
BLKIO_THROTL_read_bps_device,
BLKIO_THROTL_write_bps_device,
BLKIO_THROTL_read_iops_device,
BLKIO_THROTL_write_iops_device,
BLKIO_THROTL_io_service_bytes,
BLKIO_THROTL_io_serviced,
};
@ -168,6 +170,7 @@ struct blkio_policy_node {
* by file type "fileid".
*/
u64 bps;
unsigned int iops;
} val;
};
@ -177,6 +180,10 @@ extern uint64_t blkcg_get_read_bps(struct blkio_cgroup *blkcg,
dev_t dev);
extern uint64_t blkcg_get_write_bps(struct blkio_cgroup *blkcg,
dev_t dev);
extern unsigned int blkcg_get_read_iops(struct blkio_cgroup *blkcg,
dev_t dev);
extern unsigned int blkcg_get_write_iops(struct blkio_cgroup *blkcg,
dev_t dev);
typedef void (blkio_unlink_group_fn) (void *key, struct blkio_group *blkg);
typedef void (blkio_update_group_weight_fn) (struct blkio_group *blkg,
@ -185,12 +192,18 @@ typedef void (blkio_update_group_read_bps_fn) (struct blkio_group *blkg,
u64 read_bps);
typedef void (blkio_update_group_write_bps_fn) (struct blkio_group *blkg,
u64 write_bps);
typedef void (blkio_update_group_read_iops_fn) (struct blkio_group *blkg,
unsigned int read_iops);
typedef void (blkio_update_group_write_iops_fn) (struct blkio_group *blkg,
unsigned int write_iops);
struct blkio_policy_ops {
blkio_unlink_group_fn *blkio_unlink_group_fn;
blkio_update_group_weight_fn *blkio_update_group_weight_fn;
blkio_update_group_read_bps_fn *blkio_update_group_read_bps_fn;
blkio_update_group_write_bps_fn *blkio_update_group_write_bps_fn;
blkio_update_group_read_iops_fn *blkio_update_group_read_iops_fn;
blkio_update_group_write_iops_fn *blkio_update_group_write_iops_fn;
};
struct blkio_policy_type {