From: Catalin Marinas <catalin.marinas@arm.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>,
Vegard Nossum <vegard.nossum@gmail.com>,
linux-kernel@vger.kernel.org
Subject: Re: WARNING: kmemcheck: Caught 32-bit read from uninitialized memory (f6f6e1a4), by kmemleak's scan_block()
Date: Tue, 25 Aug 2009 14:57:38 +0100 [thread overview]
Message-ID: <1251208658.15678.45.camel@pc1117.cambridge.arm.com> (raw)
In-Reply-To: <20090825104311.GA10642@elte.hu>
On Tue, 2009-08-25 at 12:43 +0200, Ingo Molnar wrote:
> btw., i re-tested the original tree, and got the lockup/crash below.
>
> Ingo
>
> --------------->
> EXT3 FS on sdb1, internal journal
> EXT3-fs: mounted filesystem with writeback data mode.
> BUG: soft lockup - CPU#0 stuck for 61s! [kmemleak:3080]
Do you have the "Allow rescheduling during object scanning" patch? Apart
from that, you may need another for not holding the tasklist_lock when
scanning the task stacks - it is at the top of my kmemleak branch,
together with a patch or informing kmemleak about thread stack
allocations
(http://www.linux-arm.org/git?p=linux-2.6.git;a=shortlog;h=refs/heads/kmemleak).
With these patches, I don't get any soft lockups on my system.
--
Catalin
next prev parent reply other threads:[~2009-08-25 13:57 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-25 7:19 WARNING: kmemcheck: Caught 32-bit read from uninitialized memory (f6f6e1a4), by kmemleak's scan_block() Ingo Molnar
2009-08-25 8:04 ` Vegard Nossum
2009-08-25 8:08 ` Pekka Enberg
2009-08-25 8:27 ` Catalin Marinas
2009-08-25 8:31 ` Pekka Enberg
2009-08-25 8:40 ` Ingo Molnar
2009-08-25 8:48 ` Pekka Enberg
2009-08-25 8:32 ` Ingo Molnar
2009-08-25 8:45 ` Pekka Enberg
2009-08-25 8:48 ` Ingo Molnar
2009-08-25 8:54 ` Pekka Enberg
2009-08-25 9:03 ` Vegard Nossum
2009-08-25 9:11 ` Catalin Marinas
2009-08-25 9:15 ` Pekka Enberg
2009-08-25 9:25 ` Catalin Marinas
2009-08-25 9:11 ` Pekka Enberg
2009-08-25 9:21 ` Catalin Marinas
2009-08-25 9:26 ` Pekka Enberg
2009-08-25 9:28 ` Catalin Marinas
2009-08-25 9:31 ` Pekka Enberg
2009-08-25 9:34 ` Catalin Marinas
2009-08-25 9:34 ` Ingo Molnar
2009-08-25 10:43 ` Ingo Molnar
2009-08-25 13:57 ` Catalin Marinas [this message]
2009-08-26 10:48 ` Pekka Enberg
2009-08-26 11:17 ` Ingo Molnar
2009-08-25 9:25 ` Ingo Molnar
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