ZFS Hangs

[David Taylor]

On Fri, 02 Nov 2007, Thomas Sparrevohn wrote:

> 
> Hi
> 
> One of the recent changes (after 28/10) has started making CURRENT hang in a wait state called zfs:(&zio->io_cv) - As the machine just has been rebuild 
> I cannot narrow it down any more than that

I have seen a number of processes appear to hang in that state.

For example, pkg_delete seems to be _extremely_ slow and ^T reports that
it is stuck waiting on zfs:(&zio->io_cv) for an unreasonable (IMO) amount
of time.

I may once have been forced to reboot the system due to this problem
"spreading" to other processes, but I had no time nor ability to 
investigate it further, so I'm not even sure it was the same problem.

-- 
David Taylor