| To: | "Han, Weidong" <weidong.han@xxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel][VTD] 1:1 mapping for dom0 exhausts xenheap on x86/32 with 4G memory |
| From: | Keir Fraser <keir@xxxxxxxxxxxxx> |
| Date: | 2007年9月28日 07:41:55 +0100 |
| Cc: | "Kay, Allen M" <allen.m.kay@xxxxxxxxx> |
| Delivery-date: | 2007年9月27日 23:37:40 -0700 |
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| Thread-topic: | [Xen-devel][VTD] 1:1 mapping for dom0 exhausts xenheap on x86/32 with 4G memory |
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alloc_domheap_page() instead of alloc_xenheap_page(), and use map_domain_page() to get temporary mappings when you need them. This costs nothing on x86/64, where all memory is permanently mapped. Or it is *very* reasonable to only support vt-d on x86/64 hypervisor. That's the configuration we care about by far the most, since 32-bit guests run fine on a 64-bit hypervisor, and of course all vt-d systems will be 64-bit capable. -- Keir On 28/9/07 06:26, "Han, Weidong" <weidong.han@xxxxxxxxx> wrote: > xenheap size is 9M on x86/32 xen, it's not enough to setup 1:1 page > tables for dom0. It causes dom0 cannot boot successfully. Setup 1:1 page > table in domheap still might be a problem since the thinking is to use > the same 1:1 page table for both dom0 and PV domains. Currently I think > of two options: 1) go back to original method, that's to say setup page > table dynamically for dom0; 2) increase xenheap size on x86/32. How do > you think about? Thanks. > > Weidong _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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