[Qemu-devel] [RFC PATCH 03/20] Use cpu_physical_memory_set_dirty_range() to update phys_ram_dirty.

[Yoshiaki Tamura]

Modifies kvm_get_dirty_pages_log_range to use
cpu_physical_memory_set_dirty_range() to update the row of the
bit-based phys_ram_dirty bitmap at once.

Signed-off-by: Yoshiaki Tamura <address@hidden>
Signed-off-by: OHMURA Kei <address@hidden>
---
 qemu-kvm.c |   19 +++++++------------
 1 files changed, 7 insertions(+), 12 deletions(-)

diff --git a/qemu-kvm.c b/qemu-kvm.c
index 29365a9..1414f49 100644
--- a/qemu-kvm.c
+++ b/qemu-kvm.c
@@ -2323,8 +2323,8 @@ static int kvm_get_dirty_pages_log_range(unsigned long 
start_addr,
                                          unsigned long offset,
                                          unsigned long mem_size)
 {
-    unsigned int i, j;
-    unsigned long page_number, addr, addr1, c;
+    unsigned int i;
+    unsigned long page_number, addr, addr1;
     ram_addr_t ram_addr;
     unsigned int len = ((mem_size / TARGET_PAGE_SIZE) + HOST_LONG_BITS - 1) /
         HOST_LONG_BITS;
@@ -2335,16 +2335,11 @@ static int kvm_get_dirty_pages_log_range(unsigned long 
start_addr,
      */
     for (i = 0; i < len; i++) {
         if (bitmap[i] != 0) {
-            c = leul_to_cpu(bitmap[i]);
-            do {
-                j = ffsl(c) - 1;
-                c &= ~(1ul << j);
-                page_number = i * HOST_LONG_BITS + j;
-                addr1 = page_number * TARGET_PAGE_SIZE;
-                addr = offset + addr1;
-                ram_addr = cpu_get_physical_page_desc(addr);
-                cpu_physical_memory_set_dirty(ram_addr);
-            } while (c != 0);
+            page_number = i * HOST_LONG_BITS;
+            addr1 = page_number * TARGET_PAGE_SIZE;
+            addr = offset + addr1;
+            ram_addr = cpu_get_physical_page_desc(addr);
+            cpu_physical_memory_set_dirty_range(ram_addr, 
leul_to_cpu(bitmap[i]));
         }
     }
     return 0;
-- 
1.7.0.31.g1df487