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Re: [PATCH] stopmachine: add stopmachine_timeout v3

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From: Hidetoshi Seto <seto.hidetoshi@...>
To: Peter Zijlstra <peterz@...>
Cc: Max Krasnyansky <maxk@...>, <linux-kernel@...>, Rusty Russell <rusty@...>, Heiko Carstens <heiko.carstens@...>, Jeremy Fitzhardinge <jeremy@...>, Christian Borntraeger <borntraeger@...>, <virtualization@...>, Zachary Amsden <zach@...>
Subject: Re: [PATCH] stopmachine: add stopmachine_timeout v3
Date: Wednesday, July 16, 2008 - 4:12 am

Peter Zijlstra wrote:

It can be said that after timeout we just back to previous state, where
machine already limp(=partially screwed up), but have some degree of
performance.  We might be able to do some recovery, such as killing
process, restart or reset of subsystem and so on.  Even if a CPU get
stuck, it might be possible to continue its service with remaining
CPUs, ex. assume there are 1024 CPUs total.
(I wish if we were able to force-reset such unstable CPU in future...)

I agree that there are much amount of situation where this feature is
not acceptable.  But there would be others.

Thanks,
H.Seto
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Messages in current thread:
[PATCH] stopmachine: add stopmachine_timeout, Hidetoshi Seto, (Mon Jul 14, 3:52 am)
[PATCH] stopmachine: add stopmachine_timeout v4, Hidetoshi Seto, (Thu Jul 17, 2:12 am)
Re: [PATCH] stopmachine: add stopmachine_timeout v4, Max Krasnyansky, (Thu Jul 17, 3:09 am)
[PATCH] stopmachine: add stopmachine_timeout v2, Hidetoshi Seto, (Wed Jul 16, 12:27 am)
Re: [PATCH] stopmachine: add stopmachine_timeout v2, Jeremy Fitzhardinge, (Wed Jul 16, 6:11 am)
Re: [PATCH] stopmachine: add stopmachine_timeout v2, Hidetoshi Seto, (Wed Jul 16, 11:40 pm)
Re: [PATCH] stopmachine: add stopmachine_timeout v2, Rusty Russell, (Fri Jul 18, 12:18 am)
Re: [PATCH] stopmachine: add stopmachine_timeout v2, Jeremy Fitzhardinge, (Thu Jul 17, 1:37 am)
Re: [PATCH] stopmachine: add stopmachine_timeout v2, Max Krasnyansky, (Wed Jul 16, 2:23 am)
Re: [PATCH] stopmachine: add stopmachine_timeout v2, Hidetoshi Seto, (Wed Jul 16, 2:35 am)
[PATCH] stopmachine: add stopmachine_timeout v3, Hidetoshi Seto, (Wed Jul 16, 2:51 am)
Re: [PATCH] stopmachine: add stopmachine_timeout v3, Peter Zijlstra, (Wed Jul 16, 3:33 am)
Re: [PATCH] stopmachine: add stopmachine_timeout v3, Hidetoshi Seto, (Wed Jul 16, 4:12 am)
Re: [PATCH] stopmachine: add stopmachine_timeout, Christian Borntraeger, (Mon Jul 14, 7:51 am)
Re: [PATCH] stopmachine: add stopmachine_timeout, Rusty Russell, (Mon Jul 14, 8:34 am)
Re: [PATCH] stopmachine: add stopmachine_timeout, Jeremy Fitzhardinge, (Mon Jul 14, 2:56 pm)
Re: [PATCH] stopmachine: add stopmachine_timeout, Heiko Carstens, (Mon Jul 14, 5:20 pm)
Re: [PATCH] stopmachine: add stopmachine_timeout, Hidetoshi Seto, (Mon Jul 14, 10:24 pm)
Re: [PATCH] stopmachine: add stopmachine_timeout, Max Krasnyansky, (Mon Jul 14, 10:37 pm)
Re: [PATCH] stopmachine: add stopmachine_timeout, Max Krasnyansky, (Mon Jul 14, 10:24 pm)
Re: [PATCH] stopmachine: add stopmachine_timeout, Rusty Russell, (Tue Jul 15, 4:09 am)
Re: [PATCH] stopmachine: add stopmachine_timeout, Christian Borntraeger, (Wed Jul 16, 5:15 am)
Re: [PATCH] stopmachine: add stopmachine_timeout, Max Krasnyansky, (Tue Jul 15, 4:51 am)
Re: [PATCH] stopmachine: add stopmachine_timeout, Heiko Carstens, (Tue Jul 15, 4:39 am)
Re: [PATCH] stopmachine: add stopmachine_timeout, Heiko Carstens, (Tue Jul 15, 2:09 am)
Re: [PATCH] stopmachine: add stopmachine_timeout, Rusty Russell, (Mon Jul 14, 9:14 pm)
Re: [PATCH] stopmachine: add stopmachine_timeout, Rusty Russell, (Mon Jul 14, 6:43 am)
Re: [PATCH] stopmachine: add stopmachine_timeout, Hidetoshi Seto, (Mon Jul 14, 9:11 pm)
Re: [PATCH] stopmachine: add stopmachine_timeout, Rusty Russell, (Tue Jul 15, 3:50 am)
Re: [PATCH] stopmachine: add stopmachine_timeout, Hidetoshi Seto, (Wed Jul 16, 12:05 am)
Re: [PATCH] stopmachine: add stopmachine_timeout, Rusty Russell, (Sun Jul 20, 5:45 am)
[PATCH] stopmachine: allow force progress on timeout, Hidetoshi Seto, (Mon Jul 21, 11:28 pm)
Re: [PATCH] stopmachine: add stopmachine_timeout, Hidetoshi Seto, (Mon Jul 14, 4:19 am)