KVM: MMU: Make flooding detection work when guest page faults are bypassed

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When we allow guest page faults to reach the guests directly, we lose
the fault tracking which allows us to detect demand paging.  So we provide
an alternate mechnism by clearing the accessed bit when we set a pte, and
checking it later to see if the guest actually used it.

Signed-off-by: Avi Kivity <avi@qumranet.com>

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This commit is contained in:

Avi Kivity 2007-09-23 14:10:49 +02:00

parent c7addb9020

commit 12b7d28fc1

3 changed files with 29 additions and 2 deletions

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1

drivers/kvm/kvm.h

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21

drivers/kvm/mmu.c

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9

drivers/kvm/paging_tmpl.h

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