From f8d461d692c341add957fb973fb5ee1f62039dc7 Mon Sep 17 00:00:00 2001 From: Vivek Goyal Date: Thu, 3 Dec 2009 12:59:52 -0500 Subject: blkio: Propagate cgroup weight updation to cfq groups o Propagate blkio cgroup weight updation to associated cfq groups. Signed-off-by: Vivek Goyal Signed-off-by: Jens Axboe --- block/blk-cgroup.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'block/blk-cgroup.c') 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; } -- cgit v1.1