Re: XFS or Kernel Problem / Bug

[David Chinner <dgc@sgi.com>]

On Mon, Jan 22, 2007 at 09:07:23AM +0100, Stefan Priebe - FH wrote:
> Hi!
> 
> The update of the IDE layer was in 2.6.19. I don't think it is a 
> hardware bug cause all these 5 machines runs fine since a few years with 
> 2.6.16.X and before. We switch to 2.6.18.6 on monday last week and all 
> machines began to crash periodically. On friday last week we downgraded 
> them all to 2.6.16.37 and all 5 machines runs fine again. So i don't 
> believe it is a hardware problem. Do you really think that could be?

I was thinking more of a driver change that is being triggered on
that particular hardware. FWIW, did you test 2.6.19?

I really need a better idea of the workload these servers are running
and, ideally, a reproducable test case to track something like
this down. At the moment I have no idea what is going on and no
real information on which to even base a guess.

Were there any other messages in the log?

On Mon, Jan 22, 2007 at 10:42:36AM +0100, Stefan Priebe - FH wrote:
> Hi!
> 
> I've another idea... could it be, that it is a barrier problem? Since 
> barriers are enabled by default from 2.6.17 on ...

You could try turning it off. If it does fix the problem, then I'd be
pointing once again at hardware ;)

Cheers,

Dave.
-- 
Dave Chinner
Principal Engineer
SGI Australian Software Group