file system deadlock - the whole story?
rwatson at FreeBSD.org
Wed Jul 19 14:14:54 UTC 2006
On Wed, 19 Jul 2006, User Freebsd wrote:
> Also note that under FreeBSD 4.x, all three of these machines were pretty
> much my more solid machines, with even more vServers running on them then
> I'm able to run with 6.x ... once I got rid of using unionfs, stability
> skyrocketed :(
> Hrmmmm ... but, your 'controller driver' comment ... that is one common
> thing amongst all three servers ... they are all running the iir driver ...
> not sure the *exact* controller, but pluto (older Dual-PIII) shows it as:
Yes, this was going to be my next question -- if you're seeing wedges under
load and there's a common controller in use, maybe we're looking at a driver
bug. Bugs of those sort typically look a lot like what you describe: an I/O
is "lost" and so eveything that depends on the I/O wedges waiting for it,
leading to a lot of processes hanging around waiting for vnode locks, etc.
Robert N M Watson
University of Cambridge
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