* [Qemu-devel] [RFC][PATCH 9/9] migration: do not search dirty pages in bulk stage
@ 2013-03-12 15:55 Peter Lieven
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From: Peter Lieven @ 2013-03-12 15:55 UTC (permalink / raw)
To: qemu-devel@nongnu.org
Cc: Kevin Wolf, Paolo Bonzini, Orit Wasserman, Stefan Hajnoczi
avoid searching for dirty pages just increment the
page offset. all pages are dirty anyway.
Signed-off-by: Peter Lieven <pl@kamp.de>
---
arch_init.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/arch_init.c b/arch_init.c
index abd54a7..45fcf4d 100644
--- a/arch_init.c
+++ b/arch_init.c
@@ -336,8 +336,14 @@ ram_addr_t migration_bitmap_find_and_reset_dirty(MemoryRegion *mr,
unsigned long nr = base + (start >> TARGET_PAGE_BITS);
unsigned long size = base + (int128_get64(mr->size) >> TARGET_PAGE_BITS);
- unsigned long next = find_next_bit(migration_bitmap, size, nr);
-
+ unsigned long next;
+
+ if (ram_bulk_stage) {
+ next = nr + 1;
+ } else {
+ next = find_next_bit(migration_bitmap, size, nr);
+ }
+
if (next < size) {
clear_bit(next, migration_bitmap);
migration_dirty_pages--;
--
1.7.9.5
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2013-03-12 15:55 [Qemu-devel] [RFC][PATCH 9/9] migration: do not search dirty pages in bulk stage Peter Lieven
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