[Lustre-discuss] filter_grant_incoming()) LBUG in 1.8.1.1

[Cliff White]

Scott Barber wrote:
> Background:
> MDS and OSTs are all running CentOS 5.4 / x86_64 /
> 2.6.18-128.7.1.el5_lustre.1.8.1.1
> 2 types of clients
>  - CentOS 5.4 / x86_64 / 2.6.18-128.7.1.el5_lustre.1.8.1.1
>  - Ubuntu 8.04.1 / i686 / 2.6.22.19 patchless
> 
> A few days ago one of the OSSs hit an LBUG. The syslog looked like:
> http://pastie.org/887643
> 
> I brought it back up by unmounting the OSTs, restarting the machine
> and remounting the OSTs. The OST was just fine after that, but this
> seemed to start a chain-reaction with other OSSs. I'd run into the
> same LBUG and same call trace in the syslog on other OSSs. I kept
> bringing them back up again and an hour later it would happen again -
> interestingly never on the same OSS twice. It finally stopped when I
> unmounted the MDS/MGS, rebooted the MDS server and them remounted it
> again. We had no issues after that.... until this afternoon :(
> 
> In researching the issue it looks as though it is bug #19338 which in
> turn is a duplicate of #20278. It looks as though that bug isn't
> slated for 1.8 at all. Am I reading that right? There's been no
> testing that I could tell of the patch on 1.8.x so I'm leery of trying
> to patch my servers. Is there something else that I can do? Any more
> info you need?
> 

Hmm. Not sure why that fix was not landed for 1.8. Looks like we may 
have just missed it. :(  The correct fix is in 20278.
bugzilla.lustre.org/attachment.cgi?id=25139

We'll see about getting it tested/landed. It applies mostly okay to 
b1_8, further news when available.
cliffw

> 
> Thanks for your help,
> Scott Barber
> Senior Systems Admin
> iMemories.com
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