Re: repeatable hang with loop mount and heavy IO in guest (now in host - not KVM then..)

2010-05-22 Thread Antoine Martin
On 05/23/2010 01:10 AM, Jim Paris wrote: Antoine Martin wrote: On 02/27/2010 12:38 AM, Antoine Martin wrote: 1 0 0 98 0 1| 0 0 | 66B 354B| 0 0 | 3011 1 1 0 98 0 0| 0 0 | 66B 354B| 0 0 | 2911 > From that point onw

Re: repeatable hang with loop mount and heavy IO in guest (now in host - not KVM then..)

2010-05-22 Thread Jim Paris
Antoine Martin wrote: > On 02/27/2010 12:38 AM, Antoine Martin wrote: > >>> 1 0 0 98 0 1| 0 0 | 66B 354B| 0 0 | 3011 > >>> 1 1 0 98 0 0| 0 0 | 66B 354B| 0 0 | 2911 > >>>From that point onwards, nothing will happen. > >>>The host has disk IO

Re: repeatable hang with loop mount and heavy IO in guest (now in host - not KVM then..)

2010-05-21 Thread Antoine Martin
On 02/27/2010 12:38 AM, Antoine Martin wrote: 1 0 0 98 0 1| 0 0 | 66B 354B| 0 0 | 3011 1 1 0 98 0 0| 0 0 | 66B 354B| 0 0 | 2911 From that point onwards, nothing will happen. The host has disk IO to spare... So what is it waiting for?? M

Re: repeatable hang with loop mount and heavy IO in guest

2010-02-26 Thread Antoine Martin
1 0 0 98 0 1| 0 0 | 66B 354B| 0 0 | 3011 1 1 0 98 0 0| 0 0 | 66B 354B| 0 0 | 2911 From that point onwards, nothing will happen. The host has disk IO to spare... So what is it waiting for?? Moved to an AMD64 host. No effect. Disabled sw

Re: repeatable hang with loop mount and heavy IO in guest [NOT SOLVED]

2010-02-03 Thread Antoine Martin
On 01/23/2010 02:15 AM, Antoine Martin wrote: On 01/23/2010 01:28 AM, Antoine Martin wrote: On 01/22/2010 02:57 PM, Michael Tokarev wrote: Antoine Martin wrote: I've tried various guests, including most recent Fedora12 kernels, custom 2.6.32.x All of them hang around the same point (~1GB writt

Re: repeatable hang with loop mount and heavy IO in guest [NOT SOLVED]

2010-01-24 Thread Antoine Martin
On 01/23/2010 02:15 AM, Antoine Martin wrote: On 01/23/2010 01:28 AM, Antoine Martin wrote: On 01/22/2010 02:57 PM, Michael Tokarev wrote: Antoine Martin wrote: I've tried various guests, including most recent Fedora12 kernels, custom 2.6.32.x All of them hang around the same point (~1GB writt

Re: repeatable hang with loop mount and heavy IO in guest [NOT SOLVED]

2010-01-22 Thread Antoine Martin
On 01/23/2010 01:28 AM, Antoine Martin wrote: On 01/22/2010 02:57 PM, Michael Tokarev wrote: Antoine Martin wrote: I've tried various guests, including most recent Fedora12 kernels, custom 2.6.32.x All of them hang around the same point (~1GB written) when I do heavy IO write inside the guest

Re: repeatable hang with loop mount and heavy IO in guest [SOLVED]

2010-01-22 Thread Antoine Martin
On 01/22/2010 02:57 PM, Michael Tokarev wrote: Antoine Martin wrote: I've tried various guests, including most recent Fedora12 kernels, custom 2.6.32.x All of them hang around the same point (~1GB written) when I do heavy IO write inside the guest. [] Host is running: 2.6.31.4 QE

Re: repeatable hang with loop mount and heavy IO in guest

2010-01-21 Thread Michael Tokarev
Antoine Martin wrote: > I've tried various guests, including most recent Fedora12 kernels, > custom 2.6.32.x > All of them hang around the same point (~1GB written) when I do heavy IO > write inside the guest. [] > Host is running: 2.6.31.4 > QEMU PC emulator version 0.10.50 (qemu-kvm-devel-88) Pl

Re: repeatable hang with loop mount and heavy IO in guest

2010-01-21 Thread RW
No sorry, I haven't any performance data with noop. I even don't have had a crash. BUT I've experienced serve I/O degradation with noop. Once I've written a big chunk of data (e.g. a simple rsync -av /usr /opt) with noop it works for a while and after a few seconds I saw heavy writes which made the

Re: repeatable hang with loop mount and heavy IO in guest

2010-01-21 Thread Thomas Beinicke
On Thursday 21 January 2010 21:08:38 RW wrote: > Some months ago I also thought elevator=noop should be a good idea. > But it isn't. It works good as long as you only do short IO requests. > Try using deadline in host and guest. > > Robert @Robert: I've been using noop on all of my KVMs and didn'

Re: repeatable hang with loop mount and heavy IO in guest

2010-01-21 Thread RW
Some months ago I also thought elevator=noop should be a good idea. But it isn't. It works good as long as you only do short IO requests. Try using deadline in host and guest. Robert On 01/21/10 18:26, Antoine Martin wrote: > I've tried various guests, including most recent Fedora12 kernels, > c