Am 16.01.2015 um 18:28 hat John Snow geschrieben: > > > On 12/09/2014 01:15 PM, Dr. David Alan Gilbert (git) wrote: > >From: "Dr. David Alan Gilbert" <dgilb...@redhat.com> > > > >(With the previous atapi_dma flag recovery) > >If migration happens between the ATAPI command being written and the > >bmdma being started, the DMA is dropped. Eventually the guest times > >out and recovers, but that can take many seconds. > >(This is rare, on a pingpong reading the CD continuously I hit > >this about ~1/30-1/50 migrates) > > > >I don't think we've got enough state to be able to recover safely > >at this point, so I throw a 'medium error, no seek complete' > >that I'm assuming guests will try and recover from an apparently > >dirty CD. > > > >OK, it's a hack, the real solution is probably to push a lot of > >ATAPI state into the migration stream, but this is a fix that > >works with no stream changes. Tested only on Linux (both RHEL5 > >(pre-libata) and RHEL7). > > > >Signed-off-by: Dr. David Alan Gilbert <dgilb...@redhat.com>
> I think this workaround is sensible until we develop a more precise fix. > > Reviewed-by: John Snow <js...@redhat.com> Thanks, applied all to the block branch. Kevin
