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Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE tasks

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From: Ingo Molnar
Subject: Re: [feature] automatically detect hung TASK_UNINTERRUPTIBLE tasks
Date: Monday, December 3, 2007 - 3:38 am

* Andi Kleen <andi@firstfloor.org> wrote:


maybe: if the user does a Ctrl-C (or a kill -9), the kernel should try 
to honor it, instead of staying there stuck for a very long time 
(possibly forever)?

I think you are somehow confusing two issues: this patch in no way 
declares that "long waits are bad" - if the user _choses_ to wait for 
the NFS server (after phoning IT quickly or whatever), he can wait an 
hour. This patch only declares that "long waits _that the user has no 
way to stop_ are quite likely bad".

Do you see the important distinction between the two cases? Please 
reconsider your position (or re-state it differently), it just makes no 
rational sense to me so far.

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