On Sat, 22 Aug 2009, Daniel O'Connor wrote:
On Fri, 21 Aug 2009, CmdLnKid wrote:
came back or the machine was rebooted. I continued for a while using
/var/mail over NFS while setting or unset mail variables for the shell. You
may also want to check into whether something is trying to acquire a lock
on a file over that NFS mount which could accrue some extra time making it
seem like a process is hung.
We don't have any NFS mounts so I don't think that's it :(
Hi Daniel--
A number of issues were corrected over the course of the 6.x life span
involving scheduing, including some relating to "lost wakeups". Many bug
fixes relating to threading were also introduced (not sure if that's relevant
to your workload). While it's never a particularly fun recommendation, I
think I'd suggest sliding forward to the most recent 6.x kernel (but otherwise
identical configuration), perhaps sticking with your current userspace, and
seeing if that resolves the issue.
Robert N M Watson
Computer Laboratory
University of Cambridge
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