tree fd7e0de9712a29f99962b789ab3ab70a1338087f
parent 039091875ce4629d83db64c055528e7b86337d50
author Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> 1272012515 +0900
committer Avi Kivity <avi@redhat.com> 1274087953 +0300

KVM: Remove test-before-set optimization for dirty bits

As Avi pointed out, testing bit part in mark_page_dirty() was important
in the days of shadow paging, but currently EPT and NPT has already become
common and the chance of faulting a page more that once per iteration is
small. So let's remove the test bit to avoid extra access.

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Avi Kivity <avi@redhat.com>