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Re: [Xen-devel] Unplugging a dom0 vcpu and domain destruction
| To: | George Dunlap <dunlapg@xxxxxxxxx>, Jeremy Fitzhardinge <jeremy@xxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] Unplugging a dom0 vcpu and domain destruction |
| From: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Date: | Fri, 20 Feb 2009 21:17:50 +0000 |
| Cc: | "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx> |
| Delivery-date: | Fri, 20 Feb 2009 13:18:43 -0800 |
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| Thread-topic: | [Xen-devel] Unplugging a dom0 vcpu and domain destruction |
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On 20/02/2009 18:59, "George Dunlap" <dunlapg@xxxxxxxxx> wrote: >> In the pvops kernels we also keep a reference to the vcpu info structure, >> since we place it the kernel's memory rather than keeping it in the shared >> info structure. For a while that had bugs that left zombie domains lying >> around, but I don't think anyone backported that stuff to 2.6.18. > > Hmm, I'll take a look tomorrow and see if I can work out what those > two pages that were being kept are. Jeremy's hunch might be worth following up -- that the offline vcpu holds onto an mm, which doesn't get dropped until the vcpu comes back (at which point unmap_vmas() would happen). It seems likely it'll be something silly like that. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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