[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PATCH 27/30] ram: Use memory_region_test_and_clear_dirty
From: |
Juan Quintela |
Subject: |
[Qemu-devel] [PATCH 27/30] ram: Use memory_region_test_and_clear_dirty |
Date: |
Thu, 18 Oct 2012 09:30:23 +0200 |
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 <address@hidden>
---
arch_init.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/arch_init.c b/arch_init.c
index 6f39ebd..8391375 100644
--- a/arch_init.c
+++ b/arch_init.c
@@ -390,13 +390,12 @@ static void migration_bitmap_sync(void)
QLIST_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);
--
1.7.11.7
[Qemu-devel] [PATCH 20/30] migration: move begining stage to the migration thread, Juan Quintela, 2012/10/18
[Qemu-devel] [PATCH 29/30] migration: Only go to the iterate stage if there is anything to send, Juan Quintela, 2012/10/18
[Qemu-devel] [PATCH 27/30] ram: Use memory_region_test_and_clear_dirty,
Juan Quintela <=
[Qemu-devel] [PATCH 25/30] ram: Add last_sent_block, Juan Quintela, 2012/10/18
[Qemu-devel] [PATCH 26/30] memory: introduce memory_region_test_and_clear_dirty, Juan Quintela, 2012/10/18
[Qemu-devel] [PATCH 28/30] fix memory.c, Juan Quintela, 2012/10/18
[Qemu-devel] [PATCH 30/30] ram: optimize migration bitmap walking, Juan Quintela, 2012/10/18