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Commit f8d461d6 authored by Vivek Goyal's avatar Vivek Goyal Committed by Jens Axboe
Browse files

blkio: Propagate cgroup weight updation to cfq groups 



o Propagate blkio cgroup weight updation to associated cfq groups.

Signed-off-by: default avatarVivek Goyal <vgoyal@redhat.com>
Signed-off-by: default avatarJens Axboe <jens.axboe@oracle.com>
parent 24610333

block/blk-cgroup.c

+7 −0
Original line number Diff line number Diff line
@@ -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;

}

block/cfq-iosched.c

+6 −0
Original line number Diff line number Diff line
@@ -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)

{