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blkio: Propagate cgroup weight updation to cfq groups

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o Propagate blkio cgroup weight updation to associated cfq groups.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Vivek Goyal 2009-12-03 12:59:52 -05:00 committed by Jens Axboe
parent 24610333d5
commit f8d461d692
2 changed files with 13 additions and 0 deletions
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7
block/blk-cgroup.c
View file

@ -16,6 +16,7 @@
#include "blk-cgroup.h"
extern void cfq_unlink_blkio_group(void *, struct blkio_group *);
extern void cfq_update_blkio_group_weight(struct blkio_group *, unsigned int);
struct blkio_cgroup blkio_root_cgroup = { .weight = 2*BLKIO_WEIGHT_DEFAULT };
@ -116,12 +117,18 @@ static int
blkiocg_weight_write(struct cgroup *cgroup, struct cftype *cftype, u64 val)
{
struct blkio_cgroup *blkcg;
struct blkio_group *blkg;
struct hlist_node *n;
if (val < BLKIO_WEIGHT_MIN || val > BLKIO_WEIGHT_MAX)
return -EINVAL;
blkcg = cgroup_to_blkio_cgroup(cgroup);
spin_lock_irq(&blkcg->lock);
blkcg->weight = (unsigned int)val;
hlist_for_each_entry(blkg, n, &blkcg->blkg_list, blkcg_node)
cfq_update_blkio_group_weight(blkg, blkcg->weight);
spin_unlock_irq(&blkcg->lock);
return 0;
}

6
block/cfq-iosched.c
View file

@ -922,6 +922,12 @@ static inline struct cfq_group *cfqg_of_blkg(struct blkio_group *blkg)
return NULL;
}
void
cfq_update_blkio_group_weight(struct blkio_group *blkg, unsigned int weight)
{
cfqg_of_blkg(blkg)->weight = weight;
}
static struct cfq_group *
cfq_find_alloc_cfqg(struct cfq_data *cfqd, struct cgroup *cgroup, int create)
{