Re: [Xen-devel] tapdisk2 segfaults with xen-unstable+linux-2.6-pvops

[Daniel Stodden <daniel.stodden@xxxxxxxxxx>]

Hi,

Disable memshr in tools/blktap2/Makefile. Find a patch next to this
mail, unless Keir pulled it in by the time you read this.

Disable CONFIG_HIGHPTE, the config you posted has it enabled.

The pvops kernel wants a bunch of patches which haven't made it into
Jeremy's tree yet. The latest version was posted here.

http://lists.xensource.com/archives/html/xen-devel/2010-02/msg00331.html

Let me know if this work for you. Especially if it doesn't, but I
haven't heard about more open issues lately.

Thanks,
Daniel

On Wed, 2010-02-10 at 20:45 -0500, Ashish Bijlani wrote:
> Hi,
> 
> I'm trying to run guest pv vm on my machine running xen-unstable
> (xen-4.0.0-rc3.pre + linux-2.6-pvops). However, I get blktap error:
> 
> "
> sudo xm create -c xmexample
> Using config file "./xmexample".
> Error: Failed to create device.
>     stdout: unrecognized child response
>     stderr:
> Check that target "/home/ashish/xen/hd.img" exists and that blktap2
> driver installed in dom0.
> "
> 
> Dom0 dmesg shows:
> 
> "
> [ 7112.648271] blktap_sysfs_create: adding attributes for dev eb5506c0
> [ 7112.648287] blktap_control_allocate_tap: allocated tap de87e000
> [ 7112.651564] tapdisk2[7325]: segfault at 10 ip b763a540 sp bffd548c
> error 4 in libpthread-2.7.so[b7633000+14000]
> "
> 
> tapdisk2 -n aio:/home/ashish/xen/hd.img output shows the same above segfault 
> msg
> 
> Any ideas what could be wrong?
> 
> config, xmexample, and dmesg attached.
> 
> Thanks,
> Ashish



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