Am 31.07.2015 um 11:29 schrieb Paolo Bonzini:
On 31/07/2015 10:35, Peter Lieven wrote:
Am 31.07.2015 um 10:22 schrieb Paolo Bonzini:
52c91da memory: do not add a reference to the owner of aliased regions
This could be backported, yes. Feel free to send it to qemu-stable.
However, the bug was only visible with virtio 1.
Applies cleanly to 2.3.1-staging.
Good.
edec47c main-loop: fix qemu_notify_event for aio_notify optimization
Part of the above AioContext series.
So either the whole series or none of them I guess?
It's a separate bug, and theoretically it's there in 2.3.1 as well, but
no one ever reproduced it (it would hang in make check) so not worthwhile.
I maybe found another case where this bugfix seems to help. For various
reasons I'm still on 2.2.1 stable with some CVE fixes manually applied.
I currently work on the problem that a haning NFS Server where I mount
my CDROM ISOs from takes down the whole vServer because the main loop
hangs sooner or later.
I already put some patches on the list which help to improve the situation:
ide/atapi: make PIO read requests async
block/io: allow AIOCB without callback
ide/atapi: partially avoid deadlock if the storage backend is dead
block/nfs: cache allocated filesize for read-only files
However, I ended up with one case where Qemu deadlocks in bdrv_drain_one.
Scenario:
- Windows 2012R2 with a random ISO mounted.
- Block communication to NFS via Firewall
- execute 'eject ide1-cd0' in the HMP
- restore connectivity.
The HMP hangs forever even if the NFS connectivity itself is restored.
Peter
