NFS lockups with VMware esxi client

From: David Ehrmann <ehrmann_at_gmail.com>
Date: Sun, 12 Sep 2010 18:05:39 -0700
I have NFS sharing a ZFS pool that VMware esxi stores files on.  When 
put under stress (an OS installation, but not Linux compilation), the 
NFS server locks, spiking to 100% CPU usage.  Not even kill -KILL can 
stop the process, so rebooting is required.

  PID USERNAME    THR PRI NICE   SIZE    RES STATE   C   TIME   WCPU COMMAND
  885 root          4  44    0  5804K   988K CPU2    0 239:39 100.00% nfsd

Other people have run into this problem, but I never found a solution.  
I'm running 8.1-PRERELEASE on amd64, but I think others have seen the 
problem on 8.1-RELEASE.

zpool status reports that the pool is healthy, so that's not it.  My 
only two ideas are hosting on something other than ZFS and trying to 
reproduce it with a lot of big, random NFS requests.  Any other ideas?
Received on Sun Sep 12 2010 - 23:21:26 UTC

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