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
Computer Laboratory
University of Cambridge
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