Re: HEADS UP: New ZFS in the tree.

On Thu, Dec 04, 2008 at 01:06:35PM +0100, Paul B. Mahol wrote:
> On 12/4/08, Roman Divacky <rdivacky_at_freebsd.org> wrote:
> > On Thu, Dec 04, 2008 at 12:33:53AM +0100, Stefan Bethke wrote:
> >> Am 03.12.2008 um 00:29 schrieb Peter Schuller:
> >>
> >> >>I've noticed the past couple of days, when using the server (not very
> >> >>often), every now and then, the GUI (KDE 4.1) will "hang" for up to 5
> >> >>minutes (no mouse movement, no keyboard events), while the drives
> >> >>work like
> >> >>crazy.
> >> >
> >> >I was not explicit about it, but FWIW in my case the hang is not due
> >> >to drive saturation. The drives were mostly idle (except some stuff
> >> >triggered by a buildworld I had going) during the extended period of
> >> >ktorrent being unkillable. But again I never had this happen
> >> >pre-CURRENT.
> >>
> >> Just a very brief "me too" (but possibly different effect): I'm stress
> >> testing two machines I put together over the weekend with an endless
> >> loop of make -j4 universe, with /usr/obj on ZFS, with a single disk.
> >> One of the two machines has now been stuck for a couple of hours, and
> >> trying to access /tank results in a hung process, as will zfs list.
> >
> > I am not sure if it's relevant but I am getting deadlocks and stuck
> > processes over the last few days (a week at most?) even with only
> > UFS...
> >
> > does anyone see that?
> 
> I do not, how it can be reproduced?

I am seeing it when doing a lot of io activity, torrents + cvs/svn up seems
to trigger it quite successfully