[Lustre-discuss] lustre 1.6.7.2 client kernel panic

[Bernd Schubert]

Hello Nick,

at least I'm not aware on any drawbacks. 


Cheers,
Bernd

On Tuesday 22 December 2009, Nick Jennings wrote:
> Thanks for this tip Bernd. I'll be unable to upgrade for a while, so
> this is a very useful workaround. Does it have any drawbacks I should be
> aware of?
> 
> On 12/22/2009 12:35 AM, Bernd Schubert wrote:
> > On Monday 21 December 2009, Andreas Dilger wrote:
> >> On 2009-12-21, at 11:15, Nick Jennings wrote:
> >>> I had another instance of the client kernel panic which I first
> >>> encountered a few months ago. This time I managed to get a shot of the
> >>> console. Attached is the dmesg output from ssn1(OSS) dbn1(MDS) and the
> >>> JPG is from the console of wsn1(client).
> >>
> >> I see bug 19841, which has at least part of this stack
> >> (ldlm_cli_pool_shrink) and that is marked a duplicate of 17614.  The
> >> latter bug is marked landed for 1.8.0 and later releases.
> >
> > Nick, if you do not want to upgrade or patch your Lustre version, the
> > workaround for this is to disable lockless truncates.
> >
> >
> > # on all clients
> > for i in /proc/fs/lustre/llite/*; do
> >         echo 0 > ${i}/lockless_truncate;
> > done
> >
> >
> > Cheers,
> > Bernd
> 


-- 
Bernd Schubert
DataDirect Networks