Re: [Xen-devel] XFS causes Kernel trace with Jeremy's pv_ops kernel

[Jeremy Fitzhardinge <jeremy@xxxxxxxx>]

 On 10/07/2010 03:14 AM, Ulf Kreutzberg wrote:
> Hi Jeremy,
> hi all,
>
>
> I have checked out Jeremy's last git built of dom0 pv_ops kernel 2.6.32.23:
>
> commit 41a85de5caef68bbd58e11ed7b781b7867d96eaa
> Merge: 62bf426... 0ee0f94...
> Author: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
> Date:   Tue Sep 28 11:20:40 2010 -0700
>
> I have set up on a Dell PE1950 2xDualXeon 5130 an LVM2 partition
> containing XFS. I have built Jeremy's kernel successfully, so the
> running dom0 Kernel is the one mentioned above.
> System is Debian-Lenny, Xen and Xen-tools are self-built.
>
> If I make some I/O, eg:
> cd linux-2.6-xen-git (which is then on the lv with the XFS filesystem)
> make -j 7 ; make install; make -j 7 modules; make modules_install
>
> in dmesg appears a kernel trace after a while. But compiling continues
> and all keeps up and running. This only happens if the kernel is running
> under xen 4.0.2-rc1-pre hypervisor. Nothing strange happens if I run it
> on bare-metal (same machine) without hypervisor.
> I have not tested bonnie or iozone yet.
>
> I have attached booting output of xen 4.0.2-rc1-pre
> as well as the trace (file console-kerneltrace.txt).
> Kernel config is also attached (config-2.6.32.23.txt)

This doesn't look obviously Xen specific.  At least at one point XFS was
prone to spurious lockdep warnings that were hard to eliminate.  I
wonder if its possible you're seeing this under Xen because of some kind
of timing issue?

Of course it could be Xen related too, but as I said, nothing stands out.

    J

> Perhaps you can help. Please let me know if I have forgotten any
> important information.
>
> Many thanks and best regards,
> Ulf Kreutzberg
>
>
> Viele Grüße,
> Ulf
>
>
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel