Re: [Qemu-devel] Massive read only kvm guests when backing file was missing

2014-04-01 Thread Alejandro Comisario
The conclusion is that the backing file stored on NFS that is the same for all 950 hosts / 10500 guests was deleted and immediatelly raised a read-only filesystem on the guest, seems that there's no way to avoid that. We developed a script to recover from that scenario if the same happens. Basical

Re: [Qemu-devel] Massive read only kvm guests when backing file was missing

2014-04-01 Thread Stefan Hajnoczi
On Mon, Mar 31, 2014 at 09:51:23PM -0300, Alejandro Comisario wrote: > Again, thanks to everyone. Did you reach a conclusion or is there still a problem that might be a bug in KVM? Stefan -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord

Re: [Qemu-devel] Massive read only kvm guests when backing file was missing

2014-03-31 Thread Alejandro Comisario
Thanks Stefan and thanks Michael also. That situation regarding the IRC was very special, since i didnt wanted to tell Michael "hey, everyone in the mailing list got it and im here chatting with you and you didn't" so i assumed the IRC was 9 times more pro than the mailing list so i de

Re: [Qemu-devel] Massive read only kvm guests when backing file was missing

2014-03-28 Thread Stefan Hajnoczi
On Fri, Mar 28, 2014 at 11:01:00AM +0400, Michael Tokarev wrote: > 27.03.2014 20:14, Alejandro Comisario wrote: > > Seems like virtio (kvm 1.0) doesnt expose timeout on the guest side > > (ubuntu 12.04 on host and guest). > > So, how can i adjust the tinmeout on the guest ? > > After a bit more ta

Re: [Qemu-devel] Massive read only kvm guests when backing file was missing

2014-03-28 Thread Michael Tokarev
27.03.2014 20:14, Alejandro Comisario wrote: > Seems like virtio (kvm 1.0) doesnt expose timeout on the guest side > (ubuntu 12.04 on host and guest). > So, how can i adjust the tinmeout on the guest ? After a bit more talks on IRC yesterday, it turned out that the situation is _much_ more "intere

Re: [Qemu-devel] Massive read only kvm guests when backing file was missing

2014-03-27 Thread Alejandro Comisario
Seems like virtio (kvm 1.0) doesnt expose timeout on the guest side (ubuntu 12.04 on host and guest). So, how can i adjust the tinmeout on the guest ? This solution is the most logical one, but i cannot apply it! thanks for all the responses! regards Alejandro Comisario MercadoLibre Cloud Servi

Re: [Qemu-devel] Massive read only kvm guests when backing file was missing

2014-03-27 Thread Stefan Hajnoczi
On Thu, Mar 27, 2014 at 10:10:40AM +0200, Michael S. Tsirkin wrote: > On Thu, Mar 27, 2014 at 08:36:57AM +0100, Markus Armbruster wrote: > > "Michael S. Tsirkin" writes: > > > > > On Wed, Mar 26, 2014 at 11:08:03PM -0300, Alejandro Comisario wrote: > > >> Hi List! > > >> Hope some one can help me

Re: [Qemu-devel] Massive read only kvm guests when backing file was missing

2014-03-27 Thread Michael S. Tsirkin
On Thu, Mar 27, 2014 at 08:36:57AM +0100, Markus Armbruster wrote: > "Michael S. Tsirkin" writes: > > > On Wed, Mar 26, 2014 at 11:08:03PM -0300, Alejandro Comisario wrote: > >> Hi List! > >> Hope some one can help me, we had a big issue in our cloud the other > >> day, a couple of our openstack

Re: [Qemu-devel] Massive read only kvm guests when backing file was missing

2014-03-27 Thread Markus Armbruster
"Michael S. Tsirkin" writes: > On Wed, Mar 26, 2014 at 11:08:03PM -0300, Alejandro Comisario wrote: >> Hi List! >> Hope some one can help me, we had a big issue in our cloud the other >> day, a couple of our openstack regions ( +2000 kvm guests with qcow2 ) >> went read only filesystem from the g