diff mbox series

[v4,10/13] KVM: Cache kvm slot dirty bitmap size

Message ID 20210108165050.406906-7-peterx@redhat.com
State New
Headers show
Series KVM: Dirty ring support (QEMU part) | expand

Commit Message

Peter Xu Jan. 8, 2021, 4:50 p.m. UTC 
Cache it too because we'll reference it more frequently in the future.

Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
---
 accel/kvm/kvm-all.c      | 1 +
 include/sysemu/kvm_int.h | 1 +
 2 files changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index 9cb06ec4d1..5339de04cf 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -630,6 +630,7 @@  static void kvm_slot_init_dirty_bitmap(KVMSlot *mem)
     hwaddr bitmap_size = ALIGN(((mem->memory_size) >> TARGET_PAGE_BITS),
                                         /*HOST_LONG_BITS*/ 64) / 8;
     mem->dirty_bmap = g_malloc0(bitmap_size);
+    mem->dirty_bmap_size = bitmap_size;
 }
 
 /* Sync dirty bitmap from kernel to KVMSlot.dirty_bmap */
diff --git a/include/sysemu/kvm_int.h b/include/sysemu/kvm_int.h
index e0afdd02fd..7472ddb1a7 100644
--- a/include/sysemu/kvm_int.h
+++ b/include/sysemu/kvm_int.h
@@ -23,6 +23,7 @@  typedef struct KVMSlot
     int old_flags;
     /* Dirty bitmap cache for the slot */
     unsigned long *dirty_bmap;
+    unsigned long dirty_bmap_size;
     /* Cache of the address space ID */
     int as_id;
     /* Cache of the offset in ram address space */