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From: Oleg Nesterov <oleg@redhat.com>
To: Peter Zijlstra <peterz@infradead.org>, Tejun Heo <tj@kernel.org>,
	David Rientjes <rientjes@google.com>
Cc: David Laight <David.Laight@ACULAB.COM>,
	Geert Uytterhoeven <geert@linux-m68k.org>,
	Ingo Molnar <mingo@kernel.org>,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: oom-kill && frozen()
Date: Tue, 12 Nov 2013 17:56:43 +0100	[thread overview]
Message-ID: <20131112165643.GA31278@redhat.com> (raw)
In-Reply-To: <20131112162136.GA29065@redhat.com>

On 11/12, Oleg Nesterov wrote:
>
> I am also wondering if it makes any sense to turn PF_FROZEN into
> TASK_FROZEN, something like (incomplete, probably racy) patch below.
> Note that it actually adds the new state, not the the qualifier.

As for the current usage of PF_FROZEN... David, it seems that
oom_scan_process_thread()->__thaw_task() is dead? Probably this
was fine before, when __thaw_task() cleared the "need to freeze"
condition, iirc it was PF_FROZEN.

But today __thaw_task() can't help, no? the task will simply
schedule() in D state again.

Oleg.


  reply	other threads:[~2013-11-12 16:55 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-11-12 13:53 [PATCH] ipvs: Remove unused variable ret from sync_thread_master() Geert Uytterhoeven
2013-11-12 14:13 ` Peter Zijlstra
2013-11-12 14:21   ` David Laight
2013-11-12 14:31     ` Peter Zijlstra
2013-11-12 14:38       ` David Laight
2013-11-12 16:26       ` Oleg Nesterov
2013-11-12 14:52     ` Peter Zijlstra
2013-11-12 16:21       ` Oleg Nesterov
2013-11-12 16:56         ` Oleg Nesterov [this message]
2013-11-13  3:20           ` oom-kill && frozen() Tejun Heo
2013-11-13 17:07             ` Oleg Nesterov
2013-11-13 17:42               ` Peter Zijlstra
2013-11-13 18:15                 ` Oleg Nesterov
2013-11-13 19:11               ` __refrigerator() && saved task->state Oleg Nesterov
2013-11-13 19:14                 ` Peter Zijlstra
2013-11-13 19:40                   ` Oleg Nesterov
2013-11-12 17:00         ` [PATCH] ipvs: Remove unused variable ret from sync_thread_master() Peter Zijlstra
2013-11-12 18:04           ` Oleg Nesterov

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