From: Al Viro <viro@ftp.linux.org.uk>
To: David Miller <davem@davemloft.net>
Cc: dgc@sgi.com, jesper.juhl@gmail.com, chatz@melbourne.sgi.com,
linux-kernel@vger.kernel.org, xfs@oss.sgi.com,
xfs-masters@oss.sgi.com, netdev@vger.kernel.org,
linux-scsi@vger.kernel.org
Subject: Re: 2.6.19-rc6 : Spontaneous reboots, stack overflows - seems to implicate xfs, scsi, networking, SMP
Date: Thu, 23 Nov 2006 04:35:43 +0000 [thread overview]
Message-ID: <20061123043543.GI3078@ftp.linux.org.uk> (raw)
In-Reply-To: <20061122.201013.112290046.davem@davemloft.net>
On Wed, Nov 22, 2006 at 08:10:13PM -0800, David Miller wrote:
> From: David Chinner <dgc@sgi.com>
> Date: Thu, 23 Nov 2006 12:18:09 +1100
>
> > So, assuming the stacks less than 32 bytes are 32 bytes, we've got
> > 1380 bytes in the XFS stack there,
>
> On sparc64 just the XFS parts of the backtrace would be a minimum of
> 2816 bytes (each function has a minimum 8 * 16 byte stack frame, and
> there are about 22 calls in that trace). It's probably a lot more
> with local variables and such.
>
> It's way too much. You guys have to fix this stuff.
>
> If TCP's full send and receive path can be done in less function
> calls, XFS can allocate blocks in less too.
>
> I would even say 10 function calls deep to allocate file blocks
> is overkill, but 22 it just astronomically bad.
Especially since a large part is due to cxfs...
next prev parent reply other threads:[~2006-11-23 4:35 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-21 9:27 2.6.19-rc6 : Spontaneous reboots, stack overflows - seems to implicate xfs, scsi, networking, SMP Jesper Juhl
2006-11-21 21:53 ` David Chatterton
2006-11-21 22:02 ` Jesper Juhl
2006-11-21 23:31 ` David Chinner
2006-11-21 23:51 ` Jesper Juhl
2006-11-22 12:58 ` Jesper Juhl
2006-11-22 20:01 ` Stephen Hemminger
2006-11-23 10:27 ` Jesper Juhl
2006-11-23 1:18 ` David Chinner
2006-11-23 4:10 ` David Miller
2006-11-23 4:35 ` Al Viro [this message]
2006-11-23 6:47 ` Matthew Wilcox
2006-11-23 8:12 ` Arjan van de Ven
2006-11-23 22:08 ` [xfs-masters] " Nathan Scott
2006-11-26 14:31 ` Eric Sandeen
2006-11-23 7:08 ` David Chinner
2006-11-23 13:16 ` Ingo Oeser
2006-11-23 18:37 ` Arjan van de Ven
2006-11-23 19:54 ` David Miller
2006-11-24 0:55 ` David Chinner
2006-11-24 1:08 ` Jesper Juhl
2006-11-24 2:05 ` David Chinner
2006-11-24 7:52 ` Arjan van de Ven
2006-11-23 19:42 ` David Miller
2006-11-29 1:56 ` David Chinner
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