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From: Chris Wedgwood <cw@f00f.org>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: Ingo Molnar <mingo@elte.hu>,
	Zwane Mwaikambo <zwane@holomorphy.com>,
	Kernel Mailing List <linux-kernel@vger.kernel.org>,
	"Martin J. Bligh" <mbligh@aracnet.com>,
	William Lee Irwin III <wli@holomorphy.com>
Subject: Re: doublefault debugging (was Re: Linux v2.5.62 --- spontaneous reboots)
Date: Thu, 20 Feb 2003 12:13:00 -0800	[thread overview]
Message-ID: <20030220201300.GA27814@f00f.org> (raw)
In-Reply-To: <Pine.LNX.4.44.0302200717230.2142-100000@home.transmeta.com>

On Thu, Feb 20, 2003 at 07:43:16AM -0800, Linus Torvalds wrote:

> This could explain Chris' problems too - my doublefault thing won't
> help much if recursion on the stack has clobbered a lot of kernel
> state (and the doublefault will likely happen only after enough
> state is clobbered that even the doublefault handling might have
> trouble).

An overflow *might* explain why

  - it never happens under 2.4.x

  - for some configurations of 2.5.x it never seems to happen either

  - for some configurations of 2.5.x it does happen, but it's very
    nebulous as to which options are required to make this happen;
    very few options seems table,  many options crashes quickly, and a
    in-between it lasts for what might be slightly longer periods of
    time

Now, one thing I'm using that many people may not be is XFS, ACLs &
quota.  Since IRIX has almost inifinite memory available in
kernel-space, I should check to make sure XFS isn't sucking too much
stack space somewhere...  it could be that it is, and depending on the
right magic internal XFS state and when an interrupt arrives or
similar, something goes splat.

I have the stack checking on, but as observed it may not suffice.  I
wonder if 16k stacks are possible for testing?



  --cw


  parent reply	other threads:[~2003-02-20 20:02 UTC|newest]

Thread overview: 93+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-02-17 23:18 Linux v2.5.62 Linus Torvalds
2003-02-18  0:03 ` Linux v2.5.62 --- spontaneous reboots Chris Wedgwood
2003-02-18  0:44   ` Jeff Garzik
2003-02-18  0:46     ` Chris Wedgwood
2003-02-18  1:42   ` Linus Torvalds
2003-02-18  1:53     ` Chris Wedgwood
2003-02-18  2:02       ` Linus Torvalds
2003-02-18  2:16         ` Chris Wedgwood
2003-02-18  2:33           ` Linus Torvalds
2003-02-18  3:21         ` Martin J. Bligh
2003-02-19 11:02         ` David Ford
2003-02-18 21:44     ` Chris Wedgwood
2003-02-18 21:59       ` Chris Wedgwood
2003-02-18 22:13         ` Linus Torvalds
2003-02-18 22:34           ` Linus Torvalds
2003-02-18 23:01           ` Chris Wedgwood
2003-02-19 23:35             ` doublefault debugging (was Re: Linux v2.5.62 --- spontaneous reboots) Linus Torvalds
2003-02-20  2:22               ` Zwane Mwaikambo
2003-02-20  2:26                 ` William Lee Irwin III
2003-02-20  2:55                   ` Zwane Mwaikambo
2003-02-20  3:15                     ` William Lee Irwin III
2003-02-20  4:52                 ` Linus Torvalds
2003-02-20  5:07                   ` William Lee Irwin III
2003-02-20  6:05                   ` Zwane Mwaikambo
2003-02-20 11:46                   ` Ingo Molnar
2003-02-20 12:12                     ` William Lee Irwin III
2003-02-20 12:33                       ` Ingo Molnar
2003-02-20 14:03                         ` Zwane Mwaikambo
2003-02-20 14:00                     ` Zwane Mwaikambo
2003-02-20 15:43                     ` Linus Torvalds
2003-02-20 15:52                       ` Ingo Molnar
2003-02-20 16:11                       ` Martin J. Bligh
2003-02-20 16:54                         ` Linus Torvalds
2003-02-20 17:24                           ` Jeff Garzik
2003-02-20 21:21                           ` Alan Cox
2003-02-20 20:20                             ` Linus Torvalds
2003-02-20 20:23                             ` Martin J. Bligh
2003-02-20 20:42                               ` William Lee Irwin III
2003-02-20 20:51                                 ` Linus Torvalds
2003-02-21  7:39                           ` [PATCH] snd_pcm_oss_change_params is a stack offender Muli Ben-Yehuda
2003-02-21  7:58                             ` Andreas Dilger
2003-02-21  8:20                               ` Muli Ben-Yehuda
2003-02-27 18:50                           ` doublefault debugging (was Re: Linux v2.5.62 --- spontaneous reboots) Randy.Dunlap
2003-02-27 19:39                             ` Muli Ben-Yehuda
2003-02-27 19:47                               ` Randy.Dunlap
2003-03-02  6:12                             ` Keith Owens
2003-02-27 23:32                           ` Randy.Dunlap
2003-02-20 23:09                         ` Chris Wedgwood
2003-02-20 16:44                       ` Ingo Molnar
2003-02-20 20:13                       ` Chris Wedgwood [this message]
2003-02-18 12:13   ` Linux v2.5.62 --- spontaneous reboots Pavel Machek
2003-02-19 10:53 ` Linux v2.5.62 David Ford
2003-02-19  6:49   ` Thomas Molina
2003-02-19 11:04   ` Duncan Sands
2003-02-19 11:07     ` William Lee Irwin III
2003-02-19 11:58       ` Duncan Sands
2003-02-19 12:04         ` William Lee Irwin III
2003-02-19 11:17   ` Hirling Endre
2003-02-19 11:24     ` Duncan Sands
2003-02-19 11:52       ` Hirling Endre
2003-02-19 18:50   ` Zilvinas Valinskas
2003-02-19 21:46     ` Remco Post
2003-02-19 22:23       ` Remco Post
2003-02-20  1:13         ` Tom Rini
2003-02-20 19:42           ` Remco Post
2003-02-20 19:46             ` Tom Rini
2003-02-20 20:05               ` Remco Post
2003-02-20 13:31     ` Dave Jones
2003-02-20 13:57       ` Zilvinas Valinskas
2003-02-20 14:31         ` Dave Jones
2003-02-21  3:58     ` Alexander Hoogerhuis
2003-02-22  5:34       ` Alexander Hoogerhuis
     [not found] <Pine.LNX.4.44.0302201830580.474-100000@localhost.localdomain>
2003-02-20 18:01 ` doublefault debugging (was Re: Linux v2.5.62 --- spontaneous reboots) Linus Torvalds
2003-02-20 18:23   ` Linus Torvalds
2003-02-20 19:36     ` Ingo Molnar
2003-02-20 19:53       ` Ingo Molnar
2003-02-20 19:57         ` Ingo Molnar
2003-02-20 20:14           ` Ingo Molnar
2003-02-20 20:17           ` Linus Torvalds
2003-02-20 20:50             ` Andrew Morton
2003-02-20 22:04               ` Ingo Molnar
2003-02-20 22:42                 ` William Lee Irwin III
2003-02-21  7:05                   ` Ingo Molnar
2003-02-20 22:00             ` Ingo Molnar
2003-02-20 22:32               ` Linus Torvalds
2003-02-20 22:40                 ` Linus Torvalds
2003-02-20 22:45                   ` Linus Torvalds
2003-02-20 22:57                 ` John Levon
2003-02-20 23:21                 ` Ingo Molnar
2003-02-20 23:36                   ` Linus Torvalds
2003-02-21  7:00                     ` Ingo Molnar
2003-02-21 15:05                       ` Linus Torvalds
2003-02-20 19:00   ` Ingo Molnar

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