From: Tejun Heo <tj@kernel.org>
To: Roman Gushchin <guro@fb.com>
Cc: Roman Gushchin <guroan@gmail.com>,
Oleg Nesterov <oleg@redhat.com>,
"cgroups@vger.kernel.org" <cgroups@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Kernel Team <Kernel-team@fb.com>
Subject: Re: [PATCH v3 4/7] cgroup: cgroup v2 freezer
Date: Tue, 20 Nov 2018 10:05:20 -0800 [thread overview]
Message-ID: <20181120180520.GZ2509588@devbig004.ftw2.facebook.com> (raw)
In-Reply-To: <20181120173858.GC21462@tower.DHCP.thefacebook.com>
Hello,
On Tue, Nov 20, 2018 at 05:39:03PM +0000, Roman Gushchin wrote:
> Yeah, it's a good point. I've thought about it mostly in the fork() context,
> where if freezing of a cgroup races with fork(), it makes no sense to
> switch the cgroup state back and forth. But that case is different, as
> the child will be trapped just on the return path from fork() call.
I think it'd be best to tie the task counter transitions to cgroup
state update and propagation so that the state is always reflective of
the task states.
Thanks.
--
tejun
next prev parent reply other threads:[~2018-11-20 18:05 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-17 0:38 [PATCH v3 0/7] freezer for cgroup v2 Roman Gushchin
2018-11-17 0:38 ` [PATCH v3 1/7] cgroup: rename freezer.c into legacy_freezer.c Roman Gushchin
2018-11-17 0:38 ` [PATCH v3 2/7] cgroup: implement __cgroup_task_count() helper Roman Gushchin
2018-11-17 0:38 ` [PATCH v3 3/7] cgroup: protect cgroup->nr_(dying_)descendants by css_set_lock Roman Gushchin
2018-11-20 16:18 ` Tejun Heo
2018-11-17 0:38 ` [PATCH v3 4/7] cgroup: cgroup v2 freezer Roman Gushchin
2018-11-20 16:25 ` Tejun Heo
2018-11-20 16:33 ` Roman Gushchin
2018-11-20 16:36 ` Tejun Heo
2018-11-20 16:43 ` Roman Gushchin
2018-11-20 16:48 ` Tejun Heo
2018-11-20 17:39 ` Roman Gushchin
2018-11-20 18:05 ` Tejun Heo [this message]
2018-11-17 0:38 ` [PATCH v3 5/7] kselftests: cgroup: don't fail on cg_kill_all() error in cg_destroy() Roman Gushchin
2018-11-17 0:38 ` [PATCH v3 6/7] kselftests: cgroup: add freezer controller self-tests Roman Gushchin
2018-11-17 0:38 ` [PATCH v3 7/7] cgroup: document cgroup v2 freezer interface Roman Gushchin
2018-11-17 8:02 ` Mike Rapoport
2018-11-19 17:42 ` Roman Gushchin
2018-11-20 14:06 ` Mike Rapoport
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