From: "Michael S. Tsirkin" <mst@redhat.com>
To: Amos Kong <akong@redhat.com>
Cc: Alex Williamson <alex.williamson@redhat.com>,
qemu-devel@nongnu.org, Anthony Liguori <aliguori@us.ibm.com>
Subject: Re: [Qemu-devel] PCI: Hot-removing a virtio-blk causes guest panic
Date: Fri, 11 May 2012 19:30:42 +0300 [thread overview]
Message-ID: <20120511162848.GA10344@redhat.com> (raw)
In-Reply-To: <4FAC979D.9050800@redhat.com>
On Fri, May 11, 2012 at 12:37:49PM +0800, Amos Kong wrote:
> good: 3.3.0 guest kernel & qemu-kvm-rhel6
> guest panic: 3.3.0 guest kernel & qemu-upstream (contains fix [1])
>
> I didn't change anything of guest kernel,
> It seems a bug of qemu-upstream.
>
> [1] http://marc.info/?l=qemu-devel&m=133670266801022&w=2
> [PATCH] qom: fix refcounting in object_property_del_child()
>
>
> >>> Start VM with one block device:
> qemu-upstream --enable-kvm -name 'vm1' -nodefaults -drive
> file='nolvm.qcow2',index=0,if=virtio,cache=none,snapshot=on -net none -m
> 2000 -smp 2 -vnc :0 -kernel vmlinuz-3.3.0 -append 'ro root=/dev/vda1
> console=tty0 console=ttyS0,115200' -drive
> file=images/u0,if=none,id=drive-virtio0-0-0,format=qcow2,cache=none
> -device virtio-blk-pci,drive=drive-virtio0-0-0,id=virti0-0-0 -monitor
> unix:/tmp/m,nowait,server
>
> >>> hot-remove the virtio disk
> (qemu)# echo "device_del virti0-0-0" | nc -U /tmp/m
>
> >>> guest panic:
Find a working version and bisect?
next prev parent reply other threads:[~2012-05-11 18:30 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-11 4:37 [Qemu-devel] PCI: Hot-removing a virtio-blk causes guest panic Amos Kong
2012-05-11 16:30 ` Michael S. Tsirkin [this message]
2012-05-13 1:00 ` Amos Kong
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