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| author | Tejun Heo <tj@kernel.org> | 2016-11-21 18:03:32 -0500 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2016-11-22 08:59:49 -0700 |
| commit | e00f4f4d0ff7e13b9115428a245b49108d625f09 (patch) | |
| tree | c7ba017472071fe72b1d99628fba056b96a56575 | |
| parent | 05aea81b4bc9e51dabd4559666c1d8d004f3662a (diff) | |
| download | linux-e00f4f4d0ff7e13b9115428a245b49108d625f09.tar.gz linux-e00f4f4d0ff7e13b9115428a245b49108d625f09.tar.bz2 linux-e00f4f4d0ff7e13b9115428a245b49108d625f09.zip | |
block,blkcg: use __GFP_NOWARN for best-effort allocations in blkcg
blkcg allocates some per-cgroup data structures with GFP_NOWAIT and
when that fails falls back to operations which aren't specific to the
cgroup. Occassional failures are expected under pressure and falling
back to non-cgroup operation is the right thing to do.
Unfortunately, I forgot to add __GFP_NOWARN to these allocations and
these expected failures end up creating a lot of noise. Add
__GFP_NOWARN.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Marc MERLIN <marc@merlins.org>
Reported-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Jens Axboe <axboe@fb.com>
| -rw-r--r-- | block/blk-cgroup.c | 9 | ||||
| -rw-r--r-- | block/cfq-iosched.c | 3 |
2 files changed, 7 insertions, 5 deletions
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c index b08ccbb9393a..8ba0af780e88 100644 --- a/block/blk-cgroup.c +++ b/block/blk-cgroup.c @@ -185,7 +185,8 @@ static struct blkcg_gq *blkg_create(struct blkcg *blkcg, } wb_congested = wb_congested_get_create(&q->backing_dev_info, - blkcg->css.id, GFP_NOWAIT); + blkcg->css.id, + GFP_NOWAIT | __GFP_NOWARN); if (!wb_congested) { ret = -ENOMEM; goto err_put_css; @@ -193,7 +194,7 @@ static struct blkcg_gq *blkg_create(struct blkcg *blkcg, /* allocate */ if (!new_blkg) { - new_blkg = blkg_alloc(blkcg, q, GFP_NOWAIT); + new_blkg = blkg_alloc(blkcg, q, GFP_NOWAIT | __GFP_NOWARN); if (unlikely(!new_blkg)) { ret = -ENOMEM; goto err_put_congested; @@ -1022,7 +1023,7 @@ blkcg_css_alloc(struct cgroup_subsys_state *parent_css) } spin_lock_init(&blkcg->lock); - INIT_RADIX_TREE(&blkcg->blkg_tree, GFP_NOWAIT); + INIT_RADIX_TREE(&blkcg->blkg_tree, GFP_NOWAIT | __GFP_NOWARN); INIT_HLIST_HEAD(&blkcg->blkg_list); #ifdef CONFIG_CGROUP_WRITEBACK INIT_LIST_HEAD(&blkcg->cgwb_list); @@ -1240,7 +1241,7 @@ pd_prealloc: if (blkg->pd[pol->plid]) continue; - pd = pol->pd_alloc_fn(GFP_NOWAIT, q->node); + pd = pol->pd_alloc_fn(GFP_NOWAIT | __GFP_NOWARN, q->node); if (!pd) swap(pd, pd_prealloc); if (!pd) { diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c index e280d08ef6d7..9894dc985e09 100644 --- a/block/cfq-iosched.c +++ b/block/cfq-iosched.c @@ -3859,7 +3859,8 @@ cfq_get_queue(struct cfq_data *cfqd, bool is_sync, struct cfq_io_cq *cic, goto out; } - cfqq = kmem_cache_alloc_node(cfq_pool, GFP_NOWAIT | __GFP_ZERO, + cfqq = kmem_cache_alloc_node(cfq_pool, + GFP_NOWAIT | __GFP_ZERO | __GFP_NOWARN, cfqd->queue->node); if (!cfqq) { cfqq = &cfqd->oom_cfqq; |