From: Tejun Heo <tj@kernel.org>
To: Johannes Weiner <hannes@cmpxchg.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Vladimir Davydov <vdavydov@virtuozzo.com>,
Michal Hocko <mhocko@suse.cz>, Li Zefan <lizefan@huawei.com>,
linux-mm@kvack.org, cgroups@vger.kernel.org,
linux-kernel@vger.kernel.org, kernel-team@fb.com
Subject: Re: [PATCH 3/3] mm: memcontrol: fix cgroup creation failure after many small jobs
Date: Fri, 17 Jun 2016 14:18:42 -0400 [thread overview]
Message-ID: <20160617181842.GP3262@mtj.duckdns.org> (raw)
In-Reply-To: <20160617162516.GD19084@cmpxchg.org>
On Fri, Jun 17, 2016 at 12:25:16PM -0400, Johannes Weiner wrote:
> The memory controller has quite a bit of state that usually outlives
> the cgroup and pins its CSS until said state disappears. At the same
> time it imposes a 16-bit limit on the CSS ID space to economically
> store IDs in the wild. Consequently, when we use cgroups to contain
> frequent but small and short-lived jobs that leave behind some page
> cache, we quickly run into the 64k limitations of outstanding CSSs.
> Creating a new cgroup fails with -ENOSPC while there are only a few,
> or even no user-visible cgroups in existence.
Acked-by: Tejun Heo <tj@kernel.org>
Thanks.
--
tejun
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next prev parent reply other threads:[~2016-06-17 18:18 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-16 3:42 [PATCH] mm: memcontrol: fix cgroup creation failure after many small jobs Johannes Weiner
2016-06-16 20:06 ` Tejun Heo
2016-06-17 16:23 ` Johannes Weiner
2016-06-17 16:23 ` [PATCH 1/3] cgroup: fix idr leak for the first cgroup root Johannes Weiner
2016-06-17 16:24 ` [PATCH 2/3] cgroup: remove unnecessary 0 check from css_from_id() Johannes Weiner
2016-06-17 18:17 ` Tejun Heo
2016-06-17 16:25 ` [PATCH 3/3] mm: memcontrol: fix cgroup creation failure after many small jobs Johannes Weiner
2016-06-17 18:18 ` Tejun Heo [this message]
2016-06-20 6:14 ` Nikolay Borisov
2016-06-21 10:16 ` Vladimir Davydov
2016-06-21 15:46 ` Johannes Weiner
2016-06-17 9:06 ` [PATCH] " Vladimir Davydov
2016-06-17 16:40 ` Johannes Weiner
2016-07-14 15:37 ` Johannes Weiner
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