Re: zfs hang in zio->io_cv) with dd read

2010-10-08 Thread John Hay
On Thu, Oct 07, 2010 at 09:28:22PM +0300, Andriy Gapon wrote: > on 07/10/2010 20:31 John Hay said the following: > > Oct 7 17:11:49 thumper1 kernel: mvsch23: EMPTY CRPB 30 (->0) 0 4000 > > Can you rule out hardware (or driver-level) problems? > E.g. by dd-ing to/from disk directly. > Doing that i

Re: zfs hang in zio->io_cv) with dd read

2010-10-07 Thread Ivan Voras
On 10/07/10 20:25, Andriy Gapon wrote: > on 07/10/2010 15:35 Ivan Voras said the following: >> /boot/loader.conf) and 2) disable superpages, they don't get along on a few >> models >> of Opterons (vm.pmap.pg_ps_enabled=0 in /boot/loader.conf). > > Those who follow know that the issue is supposed

Re: zfs hang in zio->io_cv) with dd read

2010-10-07 Thread John Hay
On Thu, Oct 07, 2010 at 10:38:58AM -0700, Jeremy Chadwick wrote: > On Thu, Oct 07, 2010 at 07:31:02PM +0200, John Hay wrote: > > On Thu, Oct 07, 2010 at 06:19:48PM +0200, Goran Lowkrantz wrote: > > > --On October 7, 2010 17:50:42 +0200 John Hay wrote: > > > > > > >On Thu, Oct 07, 2010 at 02:35:31

Re: zfs hang in zio->io_cv) with dd read

2010-10-07 Thread Andriy Gapon
on 07/10/2010 20:31 John Hay said the following: > Oct 7 17:11:49 thumper1 kernel: mvsch23: EMPTY CRPB 30 (->0) 0 4000 Can you rule out hardware (or driver-level) problems? E.g. by dd-ing to/from disk directly. Doing that in parallel on the same and/or different disks. Running any disk I/O benchm

Re: zfs hang in zio->io_cv) with dd read

2010-10-07 Thread Andriy Gapon
on 07/10/2010 15:35 Ivan Voras said the following: > /boot/loader.conf) and 2) disable superpages, they don't get along on a few > models > of Opterons (vm.pmap.pg_ps_enabled=0 in /boot/loader.conf). Those who follow know that the issue is supposed to be resolved long ago. Just in case. -- Andr

Re: zfs hang in zio->io_cv) with dd read

2010-10-07 Thread Andriy Gapon
on 07/10/2010 20:38 Jeremy Chadwick said the following: > Isn't slow I/O one of the results of ARC starvation? Slow I/O can be a result of very many things. Please remove me from CC, thanks :-) -- Andriy Gapon ___ freebsd-stable@freebsd.org mailing lis

Re: zfs hang in zio->io_cv) with dd read

2010-10-07 Thread Jeremy Chadwick
On Thu, Oct 07, 2010 at 07:31:02PM +0200, John Hay wrote: > On Thu, Oct 07, 2010 at 06:19:48PM +0200, Goran Lowkrantz wrote: > > --On October 7, 2010 17:50:42 +0200 John Hay wrote: > > > > >On Thu, Oct 07, 2010 at 02:35:31PM +0200, Ivan Voras wrote: > > >>On 10/07/10 14:15, John Hay wrote: > > >>

Re: zfs hang in zio->io_cv) with dd read

2010-10-07 Thread John Hay
On Thu, Oct 07, 2010 at 06:19:48PM +0200, Goran Lowkrantz wrote: > --On October 7, 2010 17:50:42 +0200 John Hay wrote: > > >On Thu, Oct 07, 2010 at 02:35:31PM +0200, Ivan Voras wrote: > >>On 10/07/10 14:15, John Hay wrote: > >>> Hi, > >>> > >>> I got hold of a SunFire X4500 with 48 X 500G disks a

Re: zfs hang in zio->io_cv) with dd read

2010-10-07 Thread Goran Lowkrantz
--On October 7, 2010 17:50:42 +0200 John Hay wrote: On Thu, Oct 07, 2010 at 02:35:31PM +0200, Ivan Voras wrote: On 10/07/10 14:15, John Hay wrote: > Hi, > > I got hold of a SunFire X4500 with 48 X 500G disks and thought to try > FreeBSD 8-stable with zfs on it. > > I have setup the two boot di

Re: zfs hang in zio->io_cv) with dd read

2010-10-07 Thread John Hay
On Thu, Oct 07, 2010 at 02:35:31PM +0200, Ivan Voras wrote: > On 10/07/10 14:15, John Hay wrote: > >Hi, > > > >I got hold of a SunFire X4500 with 48 X 500G disks and thought to try > >FreeBSD 8-stable with zfs on it. > > > >I have setup the two boot disks in a zfs mirror and then the rest in > >a p

Re: zfs hang in zio->io_cv) with dd read

2010-10-07 Thread Ivan Voras
On 10/07/10 14:15, John Hay wrote: Hi, I got hold of a SunFire X4500 with 48 X 500G disks and thought to try FreeBSD 8-stable with zfs on it. I have setup the two boot disks in a zfs mirror and then the rest in a pool of 6 X raidz2 of 7 disks each. I have created a 10G file with dd in the seco