Re: 2.6.24-rc6 reproducible raid5 hang

[Tim Southerwood <ts@dionic.net>]

Subtitle: Patch to mainline yet?

Hi

I don't see evidence of Neil's patch in 2.6.24, so I applied it by hand
on my server.

Was that the correct thing to do, or did this issue get fixed in a 
different way that I wouldn't have spotted? I had a look at the git logs 
but it was not obvious - please pardon my ignorance, I'm not familiar 
enough with the code.

Many thanks,

Tim

Tim Southerwood wrote:
> Carlos Carvalho wrote:
>> Tim Southerwood (ts@dionic.net) wrote on 23 January 2008 13:37:
>>  >Sorry if this breaks threaded mail readers, I only just subscribed 
>> to  >the list so don;t have the original post to reply to.
>>  >
>>  >I believe I'm having the same problem.
>>  >
>>  >Regarding XFS on a raid5 md array:
>>  >
>>  >Kernels 2.6.22-14 (Ubuntu Gutsy generic and server builds) *and* 
>>  >2.6.24-rc8 (pure build from virgin sources) compiled for amd64 arch.
>>
>> This has been corrected already, install Neil's patches. It worked for
>> several people under high stress, including us.
>> -
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> 
> Hi
> 
> I just coerced the patch into 2.6.23.14, reset 
> /sys/block/md1/md/stripe_cache_size to default (256) and rebooted.
> 
> I can confirm that after 2 hours of heavy bashing[1] the system has not 
> hung. Looks good - many thanks. But I will run with a stripe_cache_size 
> of 4096 in practise as it improves write speen on my configuration about 
> 2.5 times.
> 
> Cheers
> 
> Tim
> 
> 
> 
> [1] Rsync > 50GB to raid pluf xfs_fsr + dd 11GB of /dev/zero to same 
> filesystem.
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