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Re: [Xen-devel] Tapdisk2 problem

To: Luís Silva <luis.silva@xxxxxxxxxxxxx>
Subject: Re: [Xen-devel] Tapdisk2 problem
From: Pasi Kärkkäinen <pasik@xxxxxx>
Date: Sun, 15 Aug 2010 19:59:12 +0300
Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx
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On Sun, Aug 15, 2010 at 05:14:01PM +0100, Luís Silva wrote:
>    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
>    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?

What's the previous xen/stable-2.6.32.x version that works for you?

-- Pasi

>    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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