From: Oleg Nesterov <oleg@redhat.com>
To: Michal Hocko <mhocko@kernel.org>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>,
rientjes@google.com, hannes@cmpxchg.org, linux-mm@kvack.org
Subject: Re: [REPOST] [PATCH 2/2] mm,oom: Reverse the order of setting TIF_MEMDIE and sending SIGKILL.
Date: Wed, 26 Aug 2015 16:28:52 +0200 [thread overview]
Message-ID: <20150826142851.GA30481@redhat.com> (raw)
In-Reply-To: <20150826141233.GI25196@dhcp22.suse.cz>
Hi Michal,
On 08/26, Michal Hocko wrote:
>
> I cannot seem to find any explicit note about task_lock vs. signal
> nesting nor task_lock() anywhere in kernel/signal.c so I rather ask. Can
> we call do_send_sig_info with task_lock held?
Yes.
Simply because task_lock() doesn't disable irqs and (unfortunately ;)
we do send the signals from interrupts.
Oleg.
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next prev parent reply other threads:[~2015-08-26 14:31 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-23 7:19 Tetsuo Handa
2015-08-24 9:47 ` Michal Hocko
2015-08-25 12:06 ` Tetsuo Handa
2015-08-25 14:17 ` Michal Hocko
2015-08-25 14:37 ` Tetsuo Handa
2015-08-25 15:20 ` Michal Hocko
2015-08-26 14:12 ` Michal Hocko
2015-08-26 14:28 ` Oleg Nesterov [this message]
2015-08-27 8:38 ` Michal Hocko
2015-08-26 15:03 ` Tetsuo Handa
2015-08-27 8:40 ` Michal Hocko
2015-08-27 11:11 ` Tetsuo Handa
2015-08-27 11:34 ` Michal Hocko
2015-08-27 14:03 ` Tetsuo Handa
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