[PATCH v3 0/2] KVM: Fix refaulting due to page table update

From: Punit Agrawal
Date: Mon Aug 13 2018 - 06:44:07 EST

Contention when updating a page table entry can lead to unnecessary
refaults. The issue was reported by a user when testing PUD hugepage
support[1] but also exists for PMD and PTE updates though with a lower

This version -

* fixes a nit reported by Suzuki
* Re-orders the checks when setting PMD hugepage
* drops mistakenly introduced Change-id in the commit message


[1] https://lkml.org/lkml/2018/7/16/482

Punit Agrawal (2):
KVM: arm/arm64: Skip updating PMD entry if no change
KVM: arm/arm64: Skip updating PTE entry if no change

virt/kvm/arm/mmu.c | 43 ++++++++++++++++++++++++++++++++-----------
1 file changed, 32 insertions(+), 11 deletions(-)