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OpenSRS blog post alludes to a Linux NFS bug in 2.6.19

NFS Yusuf Goolamabbas 3 participants 3 messages Oct 19, 2008 2 messages not in the archive

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Anybody know if this is bug is fixed and if so in which kernel revision. Any ideas about its impact on vendor kernels (RHEL/SUSE Enterprise)

http://opensrs.com/blog/2008/10/technical-debrief-on-october-cluster-a-email-service-issue/

Regards, Yusuf

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#2 lore raw
Quoted 5 lines · On Sun, 19 Oct 2008 11:28:11 +0800 Yusuf Goolamabbas…

Anybody know if this is bug is fixed and if so in which kernel revision. Any ideas about its impact on vendor kernels (RHEL/SUSE Enterprise)

http://opensrs.com/blog/2008/10/technical-debrief-on-october-cluster-a-email-service-issue/

I know that more recent RHEL kernels have this fixed. The bug to track it was here:

https://bugzilla.redhat.com/show_bug.cgi?id=369561

It's also easy to tell if you have a kernel with this problem. Just do a single TCP mount on the client, and then run:

$ rpcinfo -p

...you should see port registrations for nlockmgr. If you don't see any UDP ones, then the kernel has the problem.

Signature · 1 line
Jeff Layton <[email protected]>

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#4 lore raw
Quoted 13 lines · Jeff Layton
Quoted 5 lines · On Sun, 19 Oct 2008 11:28:11 +0800 Yusuf Goolamabbas…

Anybody know if this is bug is fixed and if so in which kernel revision. Any ideas about its impact on vendor kernels (RHEL/SUSE Enterprise)

http://opensrs.com/blog/2008/10/technical-debrief-on-october-cluster-a-email-service-issue/

I know that more recent RHEL kernels have this fixed. The bug to track it was here:

https://bugzilla.redhat.com/show_bug.cgi?id=369561

Quoted 8 lines

It's also easy to tell if you have a kernel with this problem. Just do a single TCP mount on the client, and then run:

$ rpcinfo -p

...you should see port registrations for nlockmgr. If you don't see any UDP ones, then the kernel has the problem.

Note that the workaround was simply to add

lockd.nlm_udpport=<unused portnumber>

to your kernel bootparameters.

Cheers
Trond