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cgroup/blkio: Add deprecation messages to reset_stats 

It is difficult to sync with stat updaters, stats are (should be)
monotonic so users can calculate differences from a reference.

Signed-off-by: Michal Koutný <mkoutny@suse.com>
Acked-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Tejun Heo <tj@kernel.org>
pull/1183/head
Michal Koutný 2025-03-11 13:36:20 +01:00 committed by Tejun Heo
parent 012c419f8d
commit 77bbb259db
1 changed files with 1 additions and 0 deletions
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block/blk-cgroup.c
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@ -659,6 +659,7 @@ static int blkcg_reset_stats(struct cgroup_subsys_state *css,
struct blkcg_gq *blkg; struct blkcg_gq *blkg;
int i; int i;
pr_info_once("blkio.%s is deprecated\n", cftype->name);
mutex_lock(&blkcg_pol_mutex); mutex_lock(&blkcg_pol_mutex);
spin_lock_irq(&blkcg->lock); spin_lock_irq(&blkcg->lock);