Re: [Xen-devel] Tapdisk2 problem

[Luís Silva <luis.silva@xxxxxxxxxxxxx>]

Hello again,

I've tried updating the kernel as blktap has had some work on it, but the problem remains. The up to date xen/stable-2.6.32.x still behaves as described bellow. Also, I've tested this procedure against kernel 2.6.34.1 with Suse backported patches and the problem doesn't exist. I haven't still tried updating xen to 4.0.1-rc6, but from the changelog I don't see anything that could change this behaviour...

Is anyone with an up to date xen/stable-2.6.32.x kernel seeing this problem or is it just I?

Thanks,
Luís

On Wed, 2010-08-04 at 15:04 +0100, Luís Silva wrote:
>     Hello,
>     
>     I'm using both xen 4.0.1-rc5 and the latest pv_ops dom0 kernel (branch xen/stable-2.6.32.x), but I'm having some problems with tapdisk2...
>     
>     Basically, if I create a tap device (tapdisk2 -n aio:/var/lib/libvirt/images/srv-001-ub1004.img), when I try to terminate it by issuing "echo 1 > /sys/class/blktap2/blktap0/remove", the last command hangs and tapdisk2 hangs using 100% cpu.
>     
>     This happens both on manual device destruction and on virtual machine shutdown. I don't know exactly what triggered this behaviour, but I suspect kernel changes.
>     
>     Can anyone confirm this behaviour?
>     
>     Thanks,
>     Luís 
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