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Home » Mailing list archives » linux-kernel » 2007 » December » 1

Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE tasks

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From: David Rientjes <rientjes@...>
To: Ingo Molnar <mingo@...>
Cc: <linux-kernel@...>, Andrew Morton <akpm@...>, Arjan van de Ven <arjan@...>, Thomas Gleixner <tglx@...>
Subject: Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE tasks
Date: Saturday, December 1, 2007 - 2:42 pm

On Sat, 1 Dec 2007, Ingo Molnar wrote:


Wouldn't a natural extension of this feature be to mark these hung 
TASK_UNINTERRUPTIBLE tasks with a new thread flag such as TIF_HUNG for the 
purposes of the OOM killer?

Right now, the OOM killer will become a no-op when any candidate task that 
it scans through is found to have the TIF_MEMDIE flag when selecting a 
task to kill.  So any hung task in this state could cause the OOM killer 
to infinitely loop.

If lockdep could set_tsk_thread_flag(g, TIF_HUNG), this could be detected 
in the OOM killer and not only could we prevent the infinite looping but 
we could also clear TIF_MEMDIE and reduce the increased timeslice that the 
OOM killer gives to the tasks it kills.

		David
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Messages in current thread:
[feature] automatically detect hung TASK_UNINTERRUPTIBLE tasks, Ingo Molnar, (Sat Dec 1, 5:20 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Andi Kleen, (Sun Dec 2, 2:57 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Ingo Molnar, (Sun Dec 2, 2:59 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Arjan van de Ven, (Sun Dec 2, 3:41 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Andi Kleen, (Sun Dec 2, 4:09 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Ingo Molnar, (Sun Dec 2, 4:26 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Andi Kleen, (Sun Dec 2, 4:47 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Arjan van de Ven, (Sun Dec 2, 6:43 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Andi Kleen, (Sun Dec 2, 8:07 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Arjan van de Ven, (Sun Dec 2, 8:59 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Andi Kleen, (Mon Dec 3, 5:55 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Radoslaw Szkodzinski, (Mon Dec 3, 6:15 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Andi Kleen, (Mon Dec 3, 6:27 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Arjan van de Ven, (Mon Dec 3, 11:23 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Mark Lord, (Wed Dec 5, 6:31 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Andi Kleen, (Mon Dec 3, 12:36 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Ingo Molnar, (Mon Dec 3, 6:38 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Andi Kleen, (Mon Dec 3, 7:04 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Ingo Molnar, (Mon Dec 3, 7:59 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Andi Kleen, (Mon Dec 3, 8:13 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Pekka Enberg, (Mon Dec 3, 9:50 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Andi Kleen, (Mon Dec 3, 10:14 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Ingo Molnar, (Mon Dec 3, 10:19 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Andrew Morton, (Mon Dec 3, 1:57 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Rafael J. Wysocki, (Mon Dec 3, 2:28 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Ingo Molnar, (Mon Dec 3, 3:24 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Rafael J. Wysocki, (Mon Dec 3, 6:47 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Ingo Molnar, (Mon Dec 3, 8:05 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Ingo Molnar, (Mon Dec 3, 9:57 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Ingo Molnar, (Mon Dec 3, 8:28 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Andi Kleen, (Mon Dec 3, 8:41 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Ingo Molnar, (Mon Dec 3, 9:00 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Andi Kleen, (Mon Dec 3, 9:14 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Ingo Molnar, (Mon Dec 3, 6:23 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Ingo Molnar, (Sun Dec 2, 5:10 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Andi Kleen, (Sun Dec 2, 5:19 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Ingo Molnar, (Sun Dec 2, 6:20 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Andi Kleen, (Sun Dec 2, 8:00 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Arjan van de Ven, (Sun Dec 2, 6:18 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Ingo Molnar, (Sun Dec 2, 5:24 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Andi Kleen, (Sun Dec 2, 5:34 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Ingo Molnar, (Sun Dec 2, 6:25 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Ingo Molnar, (Sun Dec 2, 4:08 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., David Rientjes, (Sat Dec 1, 2:42 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Ingo Molnar, (Sat Dec 1, 3:36 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Ingo Oeser, (Sat Dec 1, 8:54 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., David Rientjes, (Sun Dec 2, 11:52 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Ingo Molnar, (Sun Dec 2, 4:58 am)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., David Rientjes, (Sat Dec 1, 2:31 pm)
Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE..., Ingo Molnar, (Sat Dec 1, 2:33 pm)

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