Re: 2.6.19-rc6 : Spontaneous reboots, stack overflows - seems to implicate xfs, scsi, networking, SMP

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On Wed, 22 Nov 2006 13:58:11 +0100
"Jesper Juhl" <jesper.juhl@xxxxxxxxx> wrote:

> On 22/11/06, Jesper Juhl <jesper.juhl@xxxxxxxxx> wrote:
> > On 22/11/06, David Chinner <dgc@xxxxxxx> wrote:
> > > On Tue, Nov 21, 2006 at 11:02:23PM +0100, Jesper Juhl wrote:
> > > > On 21/11/06, David Chatterton <chatz@xxxxxxxxxxxxxxxxx> wrote:
> ...
> > > > >Thanks for traces, I've captured this information.
> > > > >
> > > > You are welcome. If you want/need more traces then I've got ~2.1G
> > > > worth of traces that you can have :)
> > >
> > > Well, we don't need that many, but it would be nice to have a
> > > set of unique traces that lead to overflows - could you process
> > > them in some way just to extract just the unique XFS traces that
> > > occur?
> > >
> > I'll try to extract a copy of each unique trace that involves xfs,
> > sometime tomorrow or the day after, and then send you the result.
> >
> 
> Attached are two files. The one named stack_overflows.txt.gz contains
> one instance of each unique stack overflow + trace that I've got.  The
> other file named kernel_BUG.txt.gz contains a few BUG() messages that
> were also in the logs.
> 

You have a kind of worst case scenario there:
	XFS + Block layer
	TCP receive/transmit
	VLAN

It is hard to know who to blame, there is no information about stack
level at each call. Since it doesn't show up for filesystems other than
XFS, I would pick on that. Perhaps the following:


--- 2.6.19-rc6.orig/arch/i386/Kconfig.debug	2006-11-22 11:59:32.000000000 -0800
+++ 2.6.19-rc6/arch/i386/Kconfig.debug	2006-11-22 12:00:28.000000000 -0800
@@ -58,7 +58,7 @@
 
 config 4KSTACKS
 	bool "Use 4Kb for kernel stacks instead of 8Kb"
-	depends on DEBUG_KERNEL
+	depends on DEBUG_KERNEL && !XFS_FS
 	help
 	  If you say Y here the kernel will use a 4Kb stacksize for the
 	  kernel stack attached to each process/thread. This facilitates
-
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