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| author | Juan Quintela <quintela@redhat.com> | 2012-10-17 20:27:15 +0200 |
|---|---|---|
| committer | Juan Quintela <quintela@redhat.com> | 2012-12-20 23:09:40 +0100 |
| commit | ece7931817e03a4d946c15716fab5e4f781663c9 (patch) | |
| tree | f7e999ae846287b4465a5764f5a8f517d52036e0 /arch_init.c | |
| parent | 6c279db8ee99e64e498447c67c16e987150be96b (diff) | |
| download | qemu-ece7931817e03a4d946c15716fab5e4f781663c9.tar.gz | |
ram: Use memory_region_test_and_clear_dirty
This avoids having to do two walks over the dirty bitmap, once reading
the dirty bits, and anthoer cleaning them.
Signed-off-by: Juan Quintela <quintela@redhat.com>
Diffstat (limited to 'arch_init.c')
| -rw-r--r-- | arch_init.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/arch_init.c b/arch_init.c index caac526f2f..9f32ee0124 100644 --- a/arch_init.c +++ b/arch_init.c @@ -390,13 +390,12 @@ static void migration_bitmap_sync(void) QTAILQ_FOREACH(block, &ram_list.blocks, next) { for (addr = 0; addr < block->length; addr += TARGET_PAGE_SIZE) { - if (memory_region_get_dirty(block->mr, addr, TARGET_PAGE_SIZE, - DIRTY_MEMORY_MIGRATION)) { + if (memory_region_test_and_clear_dirty(block->mr, + addr, TARGET_PAGE_SIZE, + DIRTY_MEMORY_MIGRATION)) { migration_bitmap_set_dirty(block->mr, addr); } } - memory_region_reset_dirty(block->mr, 0, block->length, - DIRTY_MEMORY_MIGRATION); } trace_migration_bitmap_sync_end(migration_dirty_pages - num_dirty_pages_init); |