file system deadlock - the whole story?
freebsd at hub.org
Wed Jul 19 14:23:18 UTC 2006
On Wed, 19 Jul 2006, Robert Watson wrote:
> 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.
'k, but how do we debug *that*? :( If it was one, I'd suspect hardware
... but *three*, and only acting up *after* upgrading to FreeBSD 6.x, and
only acting up under load ...
Marc G. Fournier Hub.Org Networking Services (http://www.hub.org)
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