From: Tejun Heo <tj@kernel.org>
To: Kirill Tkhai <ktkhai@virtuozzo.com>
Cc: akpm@linux-foundation.org, cl@linux.com, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] percpu: Allow to kill tasks doing pcpu_alloc() and waiting for pcpu_balance_workfn()
Date: Wed, 14 Mar 2018 06:55:44 -0700 [thread overview]
Message-ID: <20180314135544.GT2943022@devbig577.frc2.facebook.com> (raw)
In-Reply-To: <152102825828.13166.9574628787314078889.stgit@localhost.localdomain>
On Wed, Mar 14, 2018 at 02:51:48PM +0300, Kirill Tkhai wrote:
> In case of memory deficit and low percpu memory pages,
> pcpu_balance_workfn() takes pcpu_alloc_mutex for a long
> time (as it makes memory allocations itself and waits
> for memory reclaim). If tasks doing pcpu_alloc() are
> choosen by OOM killer, they can't exit, because they
> are waiting for the mutex.
>
> The patch makes pcpu_alloc() to care about killing signal
> and use mutex_lock_killable(), when it's allowed by GFP
> flags. This guarantees, a task does not miss SIGKILL
> from OOM killer.
>
> Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Applied to percpu/for-4.16-fixes.
Thanks, Kirill.
--
tejun
next prev parent reply other threads:[~2018-03-14 13:55 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-14 11:51 Kirill Tkhai
2018-03-14 13:55 ` Tejun Heo [this message]
2018-03-14 20:56 ` Andrew Morton
2018-03-14 22:09 ` Tejun Heo
2018-03-14 22:22 ` Andrew Morton
2018-03-15 8:58 ` Kirill Tkhai
2018-03-15 10:48 ` Tetsuo Handa
2018-03-15 12:09 ` Kirill Tkhai
2018-03-15 14:09 ` Tetsuo Handa
2018-03-15 14:42 ` Kirill Tkhai
2018-03-19 15:13 ` Tejun Heo
2018-03-15 11:58 ` [PATCH] Improve mutex documentation Matthew Wilcox
2018-03-15 12:12 ` Kirill Tkhai
2018-03-15 13:18 ` Matthew Wilcox
2018-03-15 13:23 ` Kirill Tkhai
2018-03-16 13:57 ` Peter Zijlstra
2018-03-19 15:14 ` [PATCH] percpu: Allow to kill tasks doing pcpu_alloc() and waiting for pcpu_balance_workfn() Tejun Heo
2018-03-19 15:32 ` [PATCH v2] mm: " Kirill Tkhai
2018-03-19 16:39 ` Tejun Heo
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