'Re: [Xen-devel] Tapdisk2 problem'

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List:       xen-devel
Subject:    Re: [Xen-devel] Tapdisk2 problem
From:       Luís Silva <luis.silva () axiomasoft ! pt>
Date:       2010-08-15 16:14:01
Message-ID: 1281888841.4853.7.camel () luis-port
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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,
LuÃs

On Wed, 2010-08-04 at 15:04 +0100, LuÃs 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,
> LuÃs 
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel



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Hello again,<BR>
<BR>
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...<BR> <BR>
Is anyone with an up to date xen/stable-2.6.32.x kernel seeing this problem or is it \
just I?<BR> <BR>
Thanks,<BR>
Lu&#237;s<BR>
<BR>
On Wed, 2010-08-04 at 15:04 +0100, Lu&#237;s Silva wrote:<BR>
<BLOCKQUOTE TYPE=CITE>
    Hello,<BR>
    <BR>
    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...<BR>  <BR>
    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 &quot;echo 1 &gt; /sys/class/blktap2/blktap0/remove&quot;, the last command \
hangs and tapdisk2 hangs using 100% cpu.<BR>  <BR>
    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.<BR>  \
<BR>  Can anyone confirm this behaviour?<BR>
    <BR>
    Thanks,<BR>
    Lu&#237;s 
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