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Re: [Xen-devel] [PATCH] AMD IOMMU: Defer IO pagetable construction until
| To: | Wei Wang2 <wei.wang2@xxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [PATCH] AMD IOMMU: Defer IO pagetable construction until device assignment |
| From: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Date: | Wed, 02 Apr 2008 15:52:07 +0100 |
| Delivery-date: | Wed, 02 Apr 2008 07:53:34 -0700 |
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| Thread-topic: | [Xen-devel] [PATCH] AMD IOMMU: Defer IO pagetable construction until device assignment |
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On 2/4/08 15:13, "Wei Wang2" <wei.wang2@xxxxxxx> wrote: > During HVM domain creation, I/O page tables are filled by coping p2m > entries from p2m table, which is a useless step for non-passthru domain. > This patch defers I/O page table construction until the moment of device > assignment. In case that pci devices are never assigned or hot plugged, > the unnecessary duplication will be avoid. You can't duplicate p2m_lock() and p2m_unlock(). Why do you need to protect your new function with that lock anyway? -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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