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How do I re-synchronize VFS with the lock manager?

Posted on 2008-06-26
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Last Modified: 2013-12-16
The quoted error message coincided with an very high load average (it's hovering around 4) and this additional error message:  

Jun 26 11:46:11 server imap(user): open() failed with file /home/user/Maildir/.INBOX/.imap.index: Permission denied

I'm using Red Hat 4.
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Question by:BostonDynamics
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by:agriesser
ID: 21884505
What's the kernel version on this system?
I recall having strange VFS problems with older kernels (around 2.6.10).
Basically, it means that any application tried to get a lock and it was granted, but before the application could do the lock, it was acquired by someone else (typical race condition).

Is this directory on a NFS share or something like this?
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by:BostonDynamics
ID: 21892652
Kernel: 2.6.9-34.ELsmp

The directory is indeed on an NFS share, and is our mail server as well.  I inherited the NFS configuration, it spans a large company and it's definitely not entirely standard and there is occasionally some wonkiness.  I sometimes encounter locks, notably fcntl.

The VSF issue has stuck me, so far.

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agriesser earned 500 total points
ID: 21893305
OK, then you would have to either live with it or upgrade your kernel to something newer (2.6.20 has finally fixed this issue, AFAIK).
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Author Closing Comment

by:BostonDynamics
ID: 31471033
Thanks again!  I'm sure I'll have plenty more to report, soon.
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