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Re: 2.4.21pre2 + preempt + xfs BUG?



On Wed, 2002-12-25 at 19:49, Jörg Prante wrote:
> Hello,
> 
> in my 2.4.21-pre2 based -jp15 kernel patch set I can't boot with XFS and 
> preemptive kernel enabled.
> 
> I use:
>  - 2.4.21pre2
>  - preempt 2.4.20-ac1 
>  - XFS snapshot 2.4.20-2002-11-29_01:21_UTC
>  - and a lot of other patches, see http://infolinux.de/jp15
> 
> The kernel boots ok for a long time, but when it enters the init process run 
> level 5, it throws a kernel BUG in the O(1) scheduler code in schedule() at 
> the first statement when it checks for interrupt code. 
> 
> I guess it performs a sync on the XFS root file system for the first time. You 
> can find a ksymoops message below. 
> 
> Here are my observations after several changes in the configuration:
> 
> - if preemptive kernel is disabled, XFS can boot successfully. So, the bug is 
> triggered by the preemptive kernel patch.
> 
> - with preemptive kernel enabled and reiserfs, booting is no problem. So, the 
> bug is specific to the combination XFS and preempt.
> 
> Is it just me with this BUG or can it be reproduced? 
> 
> A release of the patch set is available at
> http://infolinux.de/jp15/patchset-2.4.21-pre2-jp15.tar.bz2
> 
> Best regards,
> 
>     Jörg
> 

Hi again,

Last time i forgot to CC the list...just to follow up on the previous
email.

I've created a diff with XFS (cvs version) and preempt against
2.4.21-pre2 which boots and seems to work ok (have run it for ~2 days).

The diff+details are on http://www.blazebox.homeip.net:81/~paul/linux .

Regards,

Paul B.

P.S. Happy New Year to all on the list!

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