On 08/02/2016 11:03 AM, Cornelia Huck wrote:
On Sat, 30 Jul 2016 23:42:18 +0200
Vegard Nossum <[email protected]> wrote:
Hi,
With fault injection triggering an allocation failure for the
alloc_indirect() call in virtqueue_add() I'm seeing a hang in
p9_virtio_zc_request() -- it seems to be waiting here indefinitely
(i.e. at least 120 seconds):
[...]
What happens is that the code falls back to direct virtio addressing
(after indirect addressing failed) - and this should work.
I'm more inclined to suspect a qemu instead of a kernel bug, as your
qemu version is quite old and there have been fixes in the virtio
buffer handling and virtio-9p in the meantime. (I'm suspecting
"virtio-9p: fix any_layout".)
Could you retry with a more recent qemu (at least version 2.4)?
I think maybe the version number in the stack trace is a bit misleading,
this is the full/actual version:
$ kvm --version
QEMU emulator version 2.5.0 (Debian 1:2.5+dfsg-5ubuntu10.1), Copyright
(c) 2003-2008 Fabrice Bellard
I'll still try to get qemu from git and see if it makes a difference.
Thanks,
Vegard
