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authorDan Schatzberg <schatzberg.dan@gmail.com>2021-06-29 04:38:21 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2021-06-29 19:53:50 +0200
commitc74d40e8b5e2ac5eee1ca45b12d3e174915f1d88 (patch)
tree08727901d2124b15bc22b56335ce191f498808c3 /kernel/cgroup
parentmm: charge active memcg when no mm is set (diff)
downloadlinux-c74d40e8b5e2ac5eee1ca45b12d3e174915f1d88.tar.xz
linux-c74d40e8b5e2ac5eee1ca45b12d3e174915f1d88.zip
loop: charge i/o to mem and blk cg
The current code only associates with the existing blkcg when aio is used to access the backing file. This patch covers all types of i/o to the backing file and also associates the memcg so if the backing file is on tmpfs, memory is charged appropriately. This patch also exports cgroup_get_e_css and int_active_memcg so it can be used by the loop module. Link: https://lkml.kernel.org/r/20210610173944.1203706-4-schatzberg.dan@gmail.com Signed-off-by: Dan Schatzberg <schatzberg.dan@gmail.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Jens Axboe <axboe@kernel.dk> Cc: Chris Down <chris@chrisdown.name> Cc: Michal Hocko <mhocko@suse.com> Cc: Ming Lei <ming.lei@redhat.com> Cc: Shakeel Butt <shakeelb@google.com> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/cgroup')
-rw-r--r--kernel/cgroup/cgroup.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
index 21ecc6ee6a6d..9cc8c3a686b1 100644
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -577,6 +577,7 @@ out_unlock:
rcu_read_unlock();
return css;
}
+EXPORT_SYMBOL_GPL(cgroup_get_e_css);
static void cgroup_get_live(struct cgroup *cgrp)
{