2009-06-01 20:21:39

by Rafael J. Wysocki

[permalink] [raw]
Subject: Re: [Bug #13375] Kernel crash with 2.6.29 + nfs + xfs (radix-tree)

On Sunday 31 May 2009, Alex Samad wrote:
> Hi
>
> as far as I know it is still a problem

Thanks for the update.

Best,
Rafael


> On Sat, May 30, 2009 at 09:55:40PM +0200, Rafael J. Wysocki wrote:
> > This message has been generated automatically as a part of a report
> > of regressions introduced between 2.6.28 and 2.6.29.
> >
> > The following bug entry is on the current list of known regressions
> > introduced between 2.6.28 and 2.6.29. Please verify if it still should
> > be listed and let me know (either way).
> >
> >
> > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=13375
> > Subject : Kernel crash with 2.6.29 + nfs + xfs (radix-tree)
> > Submitter : Alex Samad <[email protected]>
> > Date : 2009-05-20 0:37 (11 days old)
> > References : http://marc.info/?l=linux-kernel&m=124278675503699&w=4


2009-06-04 14:28:24

by Mike Dresser

[permalink] [raw]
Subject: Re: [Bug #13375] Kernel crash with 2.6.29 + nfs + xfs (radix-tree)

I am testing 2.6.30-rc8 on the server that has issues with 2.6.29.4,
I'll most likely know tonight or tomorrow morning if that kernel fixes
it.. I noticed a lot of xfs changes in rc8 so I figured it was worth a try.

2009-06-04 14:34:47

by Christoph Hellwig

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Subject: Re: [Bug #13375] Kernel crash with 2.6.29 + nfs + xfs (radix-tree)

On Thu, Jun 04, 2009 at 10:28:17AM -0400, Mike Dresser wrote:
> I am testing 2.6.30-rc8 on the server that has issues with 2.6.29.4,
> I'll most likely know tonight or tomorrow morning if that kernel fixes
> it.. I noticed a lot of xfs changes in rc8 so I figured it was worth a
> try.

Can you please also run with CONFIG_XFS_DEBUG enabled so that all
kinds of asserts might trigger?

2009-06-04 14:40:11

by Mike Dresser

[permalink] [raw]
Subject: Re: [Bug #13375] Kernel crash with 2.6.29 + nfs + xfs (radix-tree)

On Thu, 4 Jun 2009, Christoph Hellwig wrote:

> Can you please also run with CONFIG_XFS_DEBUG enabled so that all
> kinds of asserts might trigger?

The help for that option says the "code will be HUGE and SLOW"

How much of a slowdown are we likely talking about?

Mike

2009-06-05 09:32:55

by Christoph Hellwig

[permalink] [raw]
Subject: Re: [Bug #13375] Kernel crash with 2.6.29 + nfs + xfs (radix-tree)

On Thu, Jun 04, 2009 at 10:40:01AM -0400, Mike Dresser wrote:
> On Thu, 4 Jun 2009, Christoph Hellwig wrote:
>
>> Can you please also run with CONFIG_XFS_DEBUG enabled so that all
>> kinds of asserts might trigger?
>
> The help for that option says the "code will be HUGE and SLOW"
>
> How much of a slowdown are we likely talking about?

I haven't actually measured it, but it shouldn't be that bad. Mostly
it's adding tons of ASSERT statements. The Kconfig help is there to
prevent people from enabling it just because they can.

2009-06-05 15:19:19

by Mike Dresser

[permalink] [raw]
Subject: Re: [Bug #13375] Kernel crash with 2.6.29 + nfs + xfs (radix-tree)

On Fri, 5 Jun 2009, Christoph Hellwig wrote:

> I haven't actually measured it, but it shouldn't be that bad. Mostly

I've enabled that as of yesterday and I'll let it go through it's normal
operations.. It did survive the other night without CONFIG_XFS_DEBUG
on(and on 2.6.30-rc8), but that sometimes happened anyways.

If it makes it through this weekend without crashing then that bodes well
for something being fixed in the recent rc's.

Doesn't seem to be any slower though, the backups completed around the
same time as they always do.

Mike


2009-06-06 08:45:28

by Mathias Kretschmer

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Subject: Re: [Bug #13375] Kernel crash with 2.6.29 + nfs + xfs (radix-tree)

On Friday 05 June 2009 17:19:06 Mike Dresser wrote:
> On Fri, 5 Jun 2009, Christoph Hellwig wrote:
> > I haven't actually measured it, but it shouldn't be that bad. Mostly
>
> I've enabled that as of yesterday and I'll let it go through it's normal
> operations.. It did survive the other night without CONFIG_XFS_DEBUG
> on(and on 2.6.30-rc8), but that sometimes happened anyways.

Is your machine still happy ?

If so, I'll give 2.6.30-rc8 a shot, as well.

-Mathias

> If it makes it through this weekend without crashing then that bodes well
> for something being fixed in the recent rc's.
>
> Doesn't seem to be any slower though, the backups completed around the
> same time as they always do.
>
> Mike
>
>
>
> --
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2009-06-06 15:38:51

by Mike Dresser

[permalink] [raw]
Subject: Re: [Bug #13375] Kernel crash with 2.6.29 + nfs + xfs (radix-tree)

On Sat, 6 Jun 2009, Mathias Kretschmer wrote:

> Is your machine still happy ?
>
> If so, I'll give 2.6.30-rc8 a shot, as well.

Still running, no crashes or errors so far

Mike

2009-06-06 22:27:59

by Mathias Kretschmer

[permalink] [raw]
Subject: Re: [Bug #13375] Kernel crash with 2.6.29 + nfs + xfs (radix-tree)

On Saturday 06 June 2009 17:38:44 Mike Dresser wrote:
> On Sat, 6 Jun 2009, Mathias Kretschmer wrote:
> > Is your machine still happy ?
> >
> > If so, I'll give 2.6.30-rc8 a shot, as well.
>
> Still running, no crashes or errors so far

OK. running 2.6.30-rc8-git2. no crashes, so far.

but, same problem as with 2.6.29: tons of 'reconnect_path: npd != pd" messages
and stale NFS handles on the client boxes (i.e. my desktop).

I upgraded from 2.6.25, which worked fine.

The box is an AMD K8 (x86_64) with sata,raid6,lvm,xfs,nfsd.

Mathias


> Mike
>
> --
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