diff options
| author | Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> | 2011-11-14 18:23:34 +0900 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2011-12-27 11:17:19 +0200 |
| commit | 7850ac5420803996e2960d15b924021f28e0dffc (patch) | |
| tree | dc4ed43a8e5ffcfbf45b48c8d78228ffe9762efa /virt/kvm | |
| parent | 9b9b1492364758de82c19c36f07baa9ae162c7e5 (diff) | |
KVM: Count the number of dirty pages for dirty logging
Needed for the next patch which uses this number to decide how to write
protect a slot.
Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'virt/kvm')
| -rw-r--r-- | virt/kvm/kvm_main.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 4c5b9a23967..af5c988cafc 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -625,6 +625,7 @@ static int kvm_create_dirty_bitmap(struct kvm_memory_slot *memslot) return -ENOMEM; memslot->dirty_bitmap_head = memslot->dirty_bitmap; + memslot->nr_dirty_pages = 0; return 0; } #endif /* !CONFIG_S390 */ @@ -1491,7 +1492,8 @@ void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot, if (memslot && memslot->dirty_bitmap) { unsigned long rel_gfn = gfn - memslot->base_gfn; - __set_bit_le(rel_gfn, memslot->dirty_bitmap); + if (!__test_and_set_bit_le(rel_gfn, memslot->dirty_bitmap)) + memslot->nr_dirty_pages++; } } |