Re: 2.6.5-aa3: kernel BUG at mm/objrmap.c:137!

[Andrea Arcangeli]

On Wed, Apr 14, 2004 at 12:57:16PM +0400, Alexander Y. Fomichev wrote:
> G'Day,
> 
> I've got a bug on 2.6.5-aa3 today
> 
> System: Dual P4 Xeon 2.4GHz, 4G ECC RAM - (production web-server) pretty
> 	heavy loaded at most time, but i've got it approximately 
> 	at 02:00 (MSD) when no serious load should be.
> 	System remained accessible all the time but operations
> 	with proclist from userspace (i.e. ps, w) appears to be locked. 

I don't think apache2 uses nonlinear. there was an smp race fix in
2.6.5-aa4, so you may want to try again with 2.6.5-aa5 (latest) just in
case this was mm corruption triggered by the race.

Are you using threading with apache2? Such a race could trigger only
with threads.
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