From: Tejun Heo <tj@kernel.org>
To: Michal Hocko <mhocko@kernel.org>
Cc: "David S. Miller" <davem@davemloft.net>,
Johannes Weiner <hannes@cmpxchg.org>,
cgroups@vger.kernel.org, netdev@vger.kernel.org,
LKML <linux-kernel@vger.kernel.org>,
Michal Hocko <mhocko@suse.com>
Subject: Re: [RFC PATCH] cgroup, netclassid: add a preemption point to write_classid
Date: Tue, 23 Oct 2018 12:58:48 -0700 [thread overview]
Message-ID: <20181023195848.GC4182586@devbig004.ftw2.facebook.com> (raw)
In-Reply-To: <20181018085617.28456-1-mhocko@kernel.org>
On Thu, Oct 18, 2018 at 10:56:17AM +0200, Michal Hocko wrote:
> From: Michal Hocko <mhocko@suse.com>
>
> We have seen a customer complaining about soft lockups on !PREEMPT
> kernel config with 4.4 based kernel
...
> If a cgroup has many tasks with many open file descriptors then we would
> end up in a large loop without any rescheduling point throught the
> operation. Add cond_resched once per task.
>
> Signed-off-by: Michal Hocko <mhocko@suse.com>
Applied to cgroup/for-4.20.
Thanks.
--
tejun
prev parent reply other threads:[~2018-10-23 19:58 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-18 8:56 [RFC PATCH] cgroup, netclassid: add a preemption point to write_classid Michal Hocko
2018-10-23 19:58 ` Tejun Heo [this message]
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