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[Qemu-devel] [PATCH 27/35] ram: Use memory_region_test_and_clear_dirty
From: |
Juan Quintela |
Subject: |
[Qemu-devel] [PATCH 27/35] ram: Use memory_region_test_and_clear_dirty |
Date: |
Tue, 11 Dec 2012 13:47:03 +0100 |
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 2d566d6..b204602 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 18/35] migration: Inline qemu_fopen_ops_buffered into migrate_fd_connect, (continued)
- [Qemu-devel] [PATCH 18/35] migration: Inline qemu_fopen_ops_buffered into migrate_fd_connect, Juan Quintela, 2012/12/11
- [Qemu-devel] [PATCH 23/35] migration: unfold rest of migrate_fd_put_ready() into thread, Juan Quintela, 2012/12/11
- [Qemu-devel] [PATCH 17/35] migration: move migration_fd_put_ready(), Juan Quintela, 2012/12/11
- [Qemu-devel] [PATCH 16/35] migration: move buffered_file.c code into migration.c, Juan Quintela, 2012/12/11
- [Qemu-devel] [PATCH 22/35] migration: move exit condition to migration thread, Juan Quintela, 2012/12/11
- [Qemu-devel] [PATCH 28/35] migration: Only go to the iterate stage if there is anything to send, Juan Quintela, 2012/12/11
- [Qemu-devel] [PATCH 20/35] migration: move begining stage to the migration thread, Juan Quintela, 2012/12/11
- [Qemu-devel] [PATCH 19/35] migration: move migration notifier, Juan Quintela, 2012/12/11
- [Qemu-devel] [PATCH 25/35] ram: Add last_sent_block, Juan Quintela, 2012/12/11
- [Qemu-devel] [PATCH 21/35] migration: Add buffered_flush error handling, Juan Quintela, 2012/12/11
- [Qemu-devel] [PATCH 27/35] ram: Use memory_region_test_and_clear_dirty,
Juan Quintela <=
- [Qemu-devel] [PATCH 26/35] memory: introduce memory_region_test_and_clear_dirty, Juan Quintela, 2012/12/11
- [Qemu-devel] [PATCH 24/35] ram: rename last_block to last_seen_block, Juan Quintela, 2012/12/11
- [Qemu-devel] [PATCH 35/35] migration: print times for end phase, Juan Quintela, 2012/12/11
- [Qemu-devel] [PATCH 32/35] ram: add free_space parameter to save_live functions, Juan Quintela, 2012/12/11
- [Qemu-devel] [PATCH 30/35] ram: account the amount of transferred ram better, Juan Quintela, 2012/12/11
- [Qemu-devel] [PATCH 29/35] ram: optimize migration bitmap walking, Juan Quintela, 2012/12/11
- [Qemu-devel] [PATCH 31/35] ram: refactor ram_save_block() return value, Juan Quintela, 2012/12/11
- [Qemu-devel] [PATCH 34/35] ram: reuse ram_save_iterate() for the complete stage, Juan Quintela, 2012/12/11
- Re: [Qemu-devel] [PATCH 00/35] Migration thread (20121211), Paolo Bonzini, 2012/12/11
- [Qemu-devel] [PATCH 33/35] ram: remove xbrle last_stage optimization, Juan Quintela, 2012/12/11