Re: Linux 2.6.25-rc2

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To: Mathieu Desnoyers <mathieu.desnoyers@...>

Cc: Torsten Kaiser <just.for.lkml@...>, Ingo Molnar <mingo@...>, Linus Torvalds <torvalds@...>, Linux Kernel Mailing List <linux-kernel@...>, Christoph Lameter <clameter@...>

Subject: Re: Linux 2.6.25-rc2

Date: Tuesday, February 19, 2008 - 10:21 am

Hi Mathieu,

On Feb 19, 2008 4:02 PM, Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> wrote:
quoted text> - stat(c, ALLOC_FASTPATH); seems to be using a var++, therefore
>   indicating it is not reentrant if IRQs are disabled. Since those are
>   only stats, I guess it's ok, but still weird.

What is not re-entrant?

On Feb 19, 2008 4:02 PM, Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> wrote:
quoted text> Since this shows mostly with network card drivers, I think the most
> plausible cause would be an IRQ nesting over kmem_cache_alloc_node and
> calling it.

Yes, this can happen. Are you saying it is not safe to be in the
lockless path when an IRQ triggers?
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Messages in current thread:

Linux 2.6.25-rc2, Linus Torvalds, (Fri Feb 15, 5:23 pm)

Re: Linux 2.6.25-rc2, Torsten Kaiser, (Sat Feb 16, 5:38 pm)

Re: Linux 2.6.25-rc2, Ingo Molnar, (Tue Feb 19, 2:11 am)

Re: Linux 2.6.25-rc2, Torsten Kaiser, (Tue Feb 19, 2:54 am)

Re: Linux 2.6.25-rc2, Pekka Enberg, (Tue Feb 19, 3:21 am)

Re: Linux 2.6.25-rc2, Mathieu Desnoyers, (Tue Feb 19, 10:02 am)

Re: Linux 2.6.25-rc2, Torsten Kaiser, (Tue Feb 19, 2:39 pm)

Re: Linux 2.6.25-rc2, Eric Dumazet, (Tue Feb 19, 12:27 pm)

Re: Linux 2.6.25-rc2, Christoph Lameter, (Wed Feb 27, 7:32 pm)

Re: Linux 2.6.25-rc2, Mathieu Desnoyers, (Tue Feb 19, 4:03 pm)

Re: Linux 2.6.25-rc2, Christoph Lameter, (Wed Feb 27, 7:34 pm)

[PATCH] Implement slub fastpath in terms of freebase and fre..., Mathieu Desnoyers, (Thu Feb 28, 1:55 am)

Re: [PATCH] Implement slub fastpath in terms of freebase and..., Christoph Lameter, (Thu Feb 28, 3:08 pm)

Re: [PATCH] Implement slub fastpath in terms of freebase and..., Mathieu Desnoyers, (Thu Feb 28, 7:25 pm)

Re: [PATCH] Implement slub fastpath in terms of freebase and..., Christoph Lameter, (Thu Feb 28, 8:57 pm)

Re: [PATCH] Implement slub fastpath in terms of freebase and..., Mathieu Desnoyers, (Thu Feb 28, 9:56 pm)

Re: [PATCH] Implement slub fastpath in terms of freebase and..., Christoph Lameter, (Thu Feb 28, 10:12 pm)

Re: [PATCH] Implement slub fastpath in terms of freebase and..., Mathieu Desnoyers, (Thu Feb 28, 11:32 pm)

Re: [PATCH] Implement slub fastpath in terms of freebase and..., Christoph Lameter, (Fri Feb 29, 1:11 am)

[PATCH] Slub Freeoffset check overflow, Mathieu Desnoyers, (Fri Feb 29, 9:28 am)

[PATCH] Slub Freeoffset check overflow (updated), Mathieu Desnoyers, (Tue Mar 4, 2:17 am)

Re: [PATCH] Slub Freeoffset check overflow (updated), Christoph Lameter, (Tue Mar 4, 3:15 am)

Re: [PATCH] Implement slub fastpath in terms of freebase and..., Mathieu Desnoyers, (Fri Feb 29, 9:03 am)

Re: [PATCH] Implement slub fastpath in terms of freebase and..., Christoph Lameter, (Fri Feb 29, 3:57 pm)

Re: Linux 2.6.25-rc2, Linus Torvalds, (Tue Feb 19, 12:38 pm)

Re: Linux 2.6.25-rc2, Pekka Enberg, (Tue Feb 19, 10:21 am)

Re: Linux 2.6.25-rc2, Mathieu Desnoyers, (Tue Feb 19, 4:08 pm)

Re: Linux 2.6.25-rc2, Christoph Lameter, (Wed Feb 27, 7:32 pm)

Re: Linux 2.6.25-rc2, Andrew Morton, (Wed Feb 27, 9:57 pm)

Re: Linux 2.6.25-rc2, Jiri Kosina, (Thu Feb 28, 7:13 am)

Re: Linux 2.6.25-rc2, Ingo Molnar, (Thu Feb 28, 4:14 am)

Re: Linux 2.6.25-rc2, Alan Cox, (Thu Feb 28, 7:15 am)

Re: Linux 2.6.25-rc2, Christoph Lameter, (Wed Feb 27, 10:43 pm)

Re: Linux 2.6.25-rc2, Pekka Enberg, (Tue Feb 19, 10:38 am)

Re: Linux 2.6.25-rc2, Linus Torvalds, (Tue Feb 19, 12:20 pm)

Re: Linux 2.6.25-rc2, Torsten Kaiser, (Tue Feb 19, 3:27 pm)

Re: Linux 2.6.25-rc2, Ingo Molnar, (Tue Feb 19, 12:45 pm)

Re: Linux 2.6.25-rc2, Ingo Molnar, (Tue Feb 19, 12:48 pm)

Re: Linux 2.6.25-rc2, Ingo Molnar, (Tue Feb 19, 10:55 am)

Re: Linux 2.6.25-rc2, Pekka Enberg, (Tue Feb 19, 11:52 am)

Re: Linux 2.6.25-rc2, Zhang, Yanmin, (Tue Feb 19, 8:36 pm)

Re: Linux 2.6.25-rc2, Zhang, Yanmin, (Tue Feb 19, 10:08 pm)

Re: Linux 2.6.25-rc2, Zhang, Yanmin, (Wed Feb 20, 2:53 am)

Re: Linux 2.6.25-rc2, Pekka Enberg, (Wed Feb 20, 3:10 am)

Re: Linux 2.6.25-rc2, Ingo Molnar, (Tue Feb 19, 10:57 am)

Re: Linux 2.6.25-rc2, Pekka Enberg, (Tue Feb 19, 11:54 am)

Re: Linux 2.6.25-rc2, Ingo Molnar, (Tue Feb 19, 6:27 am)

Re: Linux 2.6.25-rc2, Mathieu Desnoyers, (Tue Feb 19, 9:02 am)

Re: Linux 2.6.25-rc2, Ingo Molnar, (Tue Feb 19, 10:00 am)

Re: Linux 2.6.25-rc2, Pekka Enberg, (Tue Feb 19, 6:45 am)

Re: Linux 2.6.25-rc2, Linus Torvalds, (Mon Feb 18, 7:54 pm)

Re: Linux 2.6.25-rc2, Torsten Kaiser, (Tue Feb 19, 2:44 am)

Re: Linux 2.6.25-rc2, Rafael J. Wysocki, (Sun Feb 17, 4:25 pm)

Re: Linux 2.6.25-rc2, Torsten Kaiser, (Sun Feb 17, 5:32 pm)

Linux 2.6.25-rc2 regression: LVM cannot find volume group, Tilman Schmidt, (Sat Feb 16, 3:14 pm)

Re: Linux 2.6.25-rc2 regression: LVM cannot find volume group, Alan Cox, (Sat Feb 16, 4:12 pm)

Re: Linux 2.6.25-rc2 regression: LVM cannot find volume group, Jiri Slaby, (Sat Feb 16, 6:37 pm)

Re: Linux 2.6.25-rc2 regression: LVM cannot find volume group, Alasdair G Kergon, (Mon Feb 18, 9:53 pm)

Re: Linux 2.6.25-rc2 regression: LVM cannot find volume group, Tilman Schmidt, (Tue Feb 19, 4:56 am)

Re: Linux 2.6.25-rc2 regression: LVM cannot find volume group, Tilman Schmidt, (Sun Feb 17, 8:57 pm)

Re: Linux 2.6.25-rc2 regression: LVM cannot find volume group, Jeff Chua, (Sun Feb 17, 9:22 pm)

Re: Linux 2.6.25-rc2 regression: LVM cannot find volume group, Tilman Schmidt, (Mon Feb 18, 6:35 am)

Re: Linux 2.6.25-rc2, Jan Engelhardt, (Sat Feb 16, 12:52 pm)

[BUG] Linux 2.6.25-rc2 - Regression from 2.6.24-rc1-git1 sof..., Kamalesh Babulal, (Sat Feb 16, 2:10 am)

Re: [BUG] Linux 2.6.25-rc2 - Regression from 2.6.24-rc1-git1..., Rafael J. Wysocki, (Sun Feb 17, 4:08 pm)

Re: [BUG] Linux 2.6.25-rc2 - Regression from 2.6.24-rc1-git1..., Jens Axboe, (Sun Feb 17, 3:29 pm)

Re: [BUG] Linux 2.6.25-rc2 - Regression from 2.6.24-rc1-git1..., KAMEZAWA Hiroyuki, (Tue Feb 19, 4:04 am)

Re: [BUG] Linux 2.6.25-rc2 - Regression from 2.6.24-rc1-git1..., Jens Axboe, (Tue Feb 19, 4:36 am)

Re: [BUG] Linux 2.6.25-rc2 - Regression from 2.6.24-rc1-git1..., Andrew Morton, (Fri Feb 22, 3:24 am)

Re: [BUG] Linux 2.6.25-rc2 - Regression from 2.6.24-rc1-git1..., Jens Axboe, (Fri Feb 22, 3:40 am)

Re: [BUG] Linux 2.6.25-rc2 - Regression from 2.6.24-rc1-git1..., Kamalesh Babulal, (Tue Feb 19, 9:19 am)

Re: [BUG] Linux 2.6.25-rc2 - Regression from 2.6.24-rc1-git1..., KAMEZAWA Hiroyuki, (Tue Feb 19, 5:02 am)

Re: [BUG] Linux 2.6.25-rc2 - Regression from 2.6.24-rc1-git1..., Jens Axboe, (Tue Feb 19, 5:01 am)

Re: [BUG] Linux 2.6.25-rc2 - Regression from 2.6.24-rc1-git1..., KAMEZAWA Hiroyuki, (Tue Feb 19, 4:47 am)

Re: [BUG] Linux 2.6.25-rc2 - Regression from 2.6.24-rc1-git1..., Jens Axboe, (Tue Feb 19, 4:58 am)

Re: [BUG] Linux 2.6.25-rc2 - Regression from 2.6.24-rc1-git1..., KAMEZAWA Hiroyuki, (Tue Feb 19, 5:07 am)

Re: [BUG] Linux 2.6.25-rc2 - Regression from 2.6.24-rc1-git1..., Jens Axboe, (Tue Feb 19, 5:09 am)

[BUG] Linux 2.6.25-rc2 - Kernel Ooops while running dbench, Kamalesh Babulal, (Sat Feb 16, 1:44 am)

Re: [BUG] Linux 2.6.25-rc2 - Kernel Ooops while running dbench, Andrew Morton, (Mon Feb 18, 8:59 am)

Re: [BUG] Linux 2.6.25-rc2 - Kernel Ooops while running dbench, Pekka Enberg, (Mon Mar 3, 7:51 am)

Re: [BUG] Linux 2.6.25-rc2 - Kernel Ooops while running dbench, Kamalesh Babulal, (Tue Mar 4, 12:03 am)

Re: [BUG] Linux 2.6.25-rc2 - Kernel Ooops while running dbench, Jeff Garzik, (Mon Feb 18, 10:25 am)

Re: [BUG] Linux 2.6.25-rc2 - Kernel Ooops while running dbench, Frans Pop, (Mon Feb 18, 12:11 pm)

Re: Linux 2.6.25-rc2, Rafael J. Wysocki, (Fri Feb 15, 10:08 pm)

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