NFS deadlock on 9.2-Beta1

Mark Saad nonesuch at
Mon Aug 5 17:10:03 UTC 2013

On Jul 29, 2013, at 10:48 PM, J David <j.david.lists at> wrote:

> If it is helpful, we have 25 nodes testing the 9.2-BETA1 build and
> without especially trying to exercise this bug, we found
> sendfile()-using processes deadlocked in WCHAN newnfs on 5 of the 25
> nodes.  The ones with highest uptime (about 3 days) seem most
> affected, so it does seem like a "sooner or later" type of thing.
> Hopefully the fix is easy and it won't be an issue, but it definitely
> does seem like a problem 9.2-RELEASE would be better off without.
> Unfortunately we are not in a position to capture the requested
> debugging information at this time; none of those nodes are running a
> debug version of the kernel.  If Michael is unable to get the
> information as he hopes, we can try to do that, possibly over the
> weekend.  For the time being, we will convert half the machines to
> rollback r250907 to try to confirm that resolves the issue.
> Thanks all!  If one has to encounter a problem like this, it is nice
> to come to the list and find the research already so well underway!
> ______________________________

  Is there any updates on this issue ? Has anyone tested it or see it happen on the release candidate ? 
Mark saad | mark.saad at

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