Re: Deadlock in md barrier code? / RAID1 / LVM CoW snapshot + ext3 / Debian 5.0 - lenny 2.6.26 kernel

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On Tue, Oct 12, 2010 at 6:06 PM, Tim Small <tim@xxxxxxxxxxx> wrote:
> Sorry, hit send too soon...
>
>
> On 21/09/10 23:30, Neil Brown wrote:
>>
>> It is odd that 2.6.32 works and 2.6.26 doesn't as I cannot find any change
>> between the two that could be related.
>> There were some deadlock issues if a read-error was detected during resync
>> but I don't think you are getting read errors are you?
>>
>
> Nope, no read errors.
>
>> A bisect would of course be easier for me, though not particularly easy
>> for
>> you....
>>
>
> I haven't as-yet been able to reproduce the issue without running OpenVZ on
> the box - I suppose the two possibilities are:
>
> 1. The bug is in the OpenVZ patches (seems unlikely given the nature of the
> hang, but possible I suppose).
Just in case you don't know 2.6.26 branch is "frozen, not maintained"
- http://wiki.openvz.org/Download/kernel/2.6.26/2.6.26-gogol.1
The only stable for now is 2.6.18 & 2.6.9 , any other is
outdated/testing http://wiki.openvz.org/Download/kernel . Ongoin start
is 2.6.32 as being new RHEL6 kernel. So i'd suggest you to go down to
.18 or take .32 from backports.

> 2. The bug is only triggered by the workload which the VZ container is
> producing
>
> ... so without this, a bisect is a non-starter.
>
> Grrr.
>
> Tim.
>
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[COOLCOLD-RIPN]
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