Am 16.06.2015 um 17:34 hat Stefan Hajnoczi geschrieben: > On Tue, Jun 16, 2015 at 3:44 PM, Peter Lieven <p...@kamp.de> wrote: > > I wonder how difficult it would be to have the IDE CDROM run in its own > > thread? > > We usually have ISOs mounted on an NFS share as CDROM. Problem: If the NFS > > Share > > goes down, it takes down monitor, qmp, vnc etc. with it. > > > > Maybe its already possible to do this via cmdline args? > > > > Any ideas, comments? > > If QEMU hangs in the read/write/flush/discard code path due to NFS > downtime it is a bug. > > QEMU is expected to hang in open/reopen because those are performed in > a blocking fashion. > > Which of these cases applies to what you are seeing? Maybe it can be fixed.
Don't forget bdrv_drain_all(), which is called a lot by the monitor. So no matter what you do (and this includes moving to a thread as in a hypothetical "ATAPI dataplane"), you end up with a hang sooner or later. Kevin
