linux-kernel - Re: Stack warning from 2.6.24-rc

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Message-Id: <1196769402.27258.158.camel@perihelion>
Date:	Tue, 04 Dec 2007 06:56:41 -0500
From:	Jon Masters <jonathan@...masters.org>
To:	Martin Knoblauch <spamtrap@...bisoft.de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Stack warning from 2.6.24-rc


On Tue, 2007-12-04 at 03:46 -0800, Martin Knoblauch wrote:
> Hi,
> 
>  I see the following stack warning(s) on a IBM x3650 (2xDual-Core, 8 GB, AACRAID with 6x146GB RAID5) running 2.6.24-rc3/rc4:
> 
> [  180.739846] mount.nfs used greatest stack depth: 3192 bytes left
> [  666.121007] bash used greatest stack depth: 3160 bytes left
> 
>  Nothing bad has happened so far. The message does not show on a similarly configured HP/DL-380g4 (CCISS instead of AACRAID) running rc3. Anything to worry? Anything I can do to help debugging?

This is enabled by CONFIG_DEBUG_STACK_USAGE, which defines
check_stack_usage. It is called on task exit and will warn each time a
task has used the biggest kernel mode stack since booting. This isn't a
bug, and isn't a (bad) warning, it's just informational right now.

Jon.


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