[Xen-ia64-devel] [PATCH][RFC] tlb insert tracking

[Isaku Yamahata <yamahata@xxxxxxxxxxxxx>]

Hi all.
This patch is for comment, review and evaluation. not for commit.
This patch isn't completed yet.
xen_ia64_tlb_track=y compile time option is added.

On VP model a page is removed from a domain, Xen/IA64 flushes vTLB
to prevent a domain from accessing the removed page
accidentaly or maliciously. However whole vTLB flush cost is very high.
With this patch, Xen/IA64 tries to track tlb insertion of granted
page. If Xen/IA64 tracks virtual address when a granted page is
unmapped from a foreign page and, then xen/ia64 flushes only 
one virtual address instead of whole vTLB flush.

thanks.
-- 
yamahata

Attachment: 10697:df83a5156781_tlb_track.patch
Description: Text document

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