[HELP] Tracking down a MD bug

[HELP] Tracking down a MD bug

[Joshua Kwan]

Hello,

I've been running benchmarks on a ~2TB software RAID array of varying
configurations using SuSE Linux 9.1's kernel 2.6.4-52-smp. I noticed that
while resyncing a newly created RAID 5 array the kernel would just hang
a few seconds after starting.

I compiled 2.6.7-mm1 just now and the RAID array is busy resyncing, and
still alive, right now.

Are there any MD code changes that could have caused this so I can point
SuSE somewhere? (Well, then again, many SuSE folks are on this list anyway...)

This is on the x86_64 architecture, highmem + SMP + SATA RAID adapter
(although I'm not using it in hardware mode.) I'll provide config/dmesg
from the old kernel on request.

Thanks,

-- 
Joshua Kwan

Re: [HELP] Tracking down a MD bug

[Neil Brown]

On Thursday June 24, jkwan@rackable.com wrote:
> Hello,
> 
> I've been running benchmarks on a ~2TB software RAID array of varying
> configurations using SuSE Linux 9.1's kernel 2.6.4-52-smp. I noticed that
> while resyncing a newly created RAID 5 array the kernel would just hang
> a few seconds after starting.
> 
> I compiled 2.6.7-mm1 just now and the RAID array is busy resyncing, and
> still alive, right now.
> 
> Are there any MD code changes that could have caused this so I can point
> SuSE somewhere? (Well, then again, many SuSE folks are on this list
> anyway...)

This is definitely a bug in the Suse 2.6.4-52 kernels, and I'm pretty
sure they have fixed it.

NeilBrown

> 
> This is on the x86_64 architecture, highmem + SMP + SATA RAID adapter
> (although I'm not using it in hardware mode.) I'll provide config/dmesg
> from the old kernel on request.
> 
> Thanks,
> 
> -- 
> Joshua Kwan
> 
> 
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Re: [HELP] Tracking down a MD bug

[Joshua Kwan]

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On Fri, Jun 25, 2004 at 07:46:48AM +1000, Neil Brown wrote:
> > Are there any MD code changes that could have caused this so I can point
> > SuSE somewhere? (Well, then again, many SuSE folks are on this list
> > anyway...)
> 
> This is definitely a bug in the Suse 2.6.4-52 kernels, and I'm pretty
> sure they have fixed it.

Thanks, I upgraded the box to 2.6.5-7.75-smp and the bug has vanished.

-- 
Joshua Kwan

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