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[Xen-devel][VTD] 1:1 mapping for dom0 exhausts xenheap on x86/32 with 4G memory


  • To: <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: "Han, Weidong" <weidong.han@xxxxxxxxx>
  • Date: Fri, 28 Sep 2007 13:26:18 +0800
  • Cc: "Kay, Allen M" <allen.m.kay@xxxxxxxxx>, Keir Fraser <keir@xxxxxxxxxxxxx>
  • Delivery-date: Thu, 27 Sep 2007 22:27:00 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AcgBkBj9hxSsSLqpQVyYGgB006zGCw==
  • Thread-topic: [Xen-devel][VTD] 1:1 mapping for dom0 exhausts xenheap on x86/32 with 4G memory

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

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