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Re: [Xen-users] xm pci-detach lockup

To: "Andrew Lyon" <andrew.lyon@xxxxxxxxx>
Subject: Re: [Xen-users] xm pci-detach lockup
From: "Todd Deshane" <deshantm@xxxxxxxxx>
Date: Tue, 23 Dec 2008 00:20:35 -0500
Cc: "xen-users@xxxxxxxxxxxxxxxxxxx" <xen-users@xxxxxxxxxxxxxxxxxxx>
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Reply-to: deshantm@xxxxxxxxx
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On Mon, Dec 22, 2008 at 2:37 PM, Andrew Lyon <andrew.lyon@xxxxxxxxx> wrote:
> Hi,
> I have a NEC USB2 PCIx card which I assign to a Vista HVM by adding
> pci = [ '0000:02:01.0', '0000:02:01.1', '0000:02:01.2' ] to the config
> file, the card works well in Vista but if I try to detach it, destroy
> the domain without shutting it down, or if the domain crashes, then
> the entire machine locks up, I have a serial console setup but it is
> completely unresponsive.
> Combined with the issue that when the machine is under heavy load
> Vista sometimes BSOD with "A clock interrupt was not received on a
> secondary processor" this causes the system to lockup frequently :(.
> I made sure to trigger safe removal of the device before detaching it.
> Perhaps all 3 functions of the card need to be detached at the same
> time? or am I wrong in assigning all 3 in the first place? they are
> all listed when I run xm pci-list-assignable-devices and it seems to
> be necessary to assign all 3.
> Assigning the device by adding the setting to the config file, or
> using xm pci-attach after the domain has booted does work, only
> detaching causes the lockup.
> This happens on my main workstation which is a Supermicro X7DWA-N
> running Xen 3.3.1 rc4 (also tried 3.3 with fix for "ValueError:
> unsupported format character ':' (0x3a) at index 6" and
> fix_find_parent.patch), I usually use my own Gentoo ebuild for Xen
> dom0 kernel which is with the openSUSE Xen patches rebased to
> apply to vanilla without any of the other patches that openSUSE kernel
> usually applies, but I have also tried using the interim 2.6.27 kernel
> from http://xenbits.xensource.com/ext/linux-2.6.27-xen.hg with the
> same result.
> I replicated the problem on a Dell Optiplex 755 using the same
> versions of Xen and kernel, but using a dlink network card which is
> assigned as a single function (0000:02:01.0), it behaved exactly the
> same, lockup on xm-detach.
> I seem to recall a commit recently for "hypervisor panic on domain
> destory with passthru", but I cannot find it, anybody know where i can
> find it and if it may help?

Maybe this is the one:

> Thanks
> Andy
> Andy
> _______________________________________________
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> http://lists.xensource.com/xen-users

Todd Deshane

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