Messages in this thread Patch in this message | | | From | Vivek Goyal <> | Subject | [PATCH 16/21] blkio: Propagate cgroup weight updation to cfq groups | Date | Sun, 29 Nov 2009 21:59:23 -0500 |
| |
o Propagate blkio cgroup weight updation to associated cfq groups.
Signed-off-by: Vivek Goyal <vgoyal@redhat.com> --- block/blk-cgroup.c | 7 +++++++ block/cfq-iosched.c | 6 ++++++ 2 files changed, 13 insertions(+), 0 deletions(-)
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c index 4ef78d3..179ddfa 100644 --- a/block/blk-cgroup.c +++ b/block/blk-cgroup.c @@ -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; } diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c index d076d01..a9fea9e 100644 --- a/block/cfq-iosched.c +++ b/block/cfq-iosched.c @@ -924,6 +924,12 @@ 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) { -- 1.6.2.5
| |