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FromGrant Coady <>
SubjectRe: 2.6.17.8 - do_vfs_lock: VFS is out of sync with lock manager!
DateWed, 09 Aug 2006 15:53:25 +1000
On Tue, 8 Aug 2006 16:39:54 +0200, "Jesper Juhl" <jesper.juhl@gmail.com> wrote:

>I have some webservers that have recently started reporting the
>following message in their logs :
>
>  do_vfs_lock: VFS is out of sync with lock manager!
>
>The serveres kernels were upgraded to 2.6.17.8 and since the upgrade
>the message started appearing.
>The servers were previously running 2.6.13.4 without experiencing this problem.
>Nothing has changed except the kernel.
>
>I've googled a bit and found this mail
>(http://lkml.org/lkml/2005/8/23/254) from Trond saying that
>"The above is a lockd error that states that the VFS is failing to track
>your NFS locks correctly".
>Ok, but that doesn't really help me resolve the issue. The servers are
>indeed running NFS and access their apache DocumentRoots from a NFS
>mount.
>
>Is there anything I can do to help track down this issue?

I don't have an answer, but offer this observation: five boxen running 
2.6.17.8 doing six simultaneous

  bzcat /home/share/linux-2.6/patch-2.6.18-rc4.bz2|patch -p1
didn't burp.  The /home/share/ is an NFS export from another box running 
2.4.33-rc3a, me not sure if this was exercising any NFS locking as the 
NFS source file was only opened for non-exclusive read-only.

Grant.
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