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[Qemu-devel] [PATCHv4 8/9] migration: do not search dirty pages in bulk
From: |
Peter Lieven |
Subject: |
[Qemu-devel] [PATCHv4 8/9] migration: do not search dirty pages in bulk stage |
Date: |
Fri, 22 Mar 2013 13:46:09 +0100 |
avoid searching for dirty pages just increment the
page offset. all pages are dirty anyway.
Signed-off-by: Peter Lieven <address@hidden>
Reviewed-by: Eric Blake <address@hidden>
---
arch_init.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/arch_init.c b/arch_init.c
index c34a4af..b2b932a 100644
--- a/arch_init.c
+++ b/arch_init.c
@@ -338,7 +338,13 @@ 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 && nr > base) {
+ next = nr + 1;
+ } else {
+ next = find_next_bit(migration_bitmap, size, nr);
+ }
if (next < size) {
clear_bit(next, migration_bitmap);
--
1.7.9.5
- [Qemu-devel] [PATCHv4 0/9] buffer_is_zero / migration optimizations, Peter Lieven, 2013/03/22
- [Qemu-devel] [PATCHv4 5/9] migration: search for zero instead of dup pages, Peter Lieven, 2013/03/22
- [Qemu-devel] [PATCHv4 3/9] buffer_is_zero: use vector optimizations if possible, Peter Lieven, 2013/03/22
- [Qemu-devel] [PATCHv4 8/9] migration: do not search dirty pages in bulk stage,
Peter Lieven <=
- [Qemu-devel] [PATCHv4 1/9] move vector definitions to qemu-common.h, Peter Lieven, 2013/03/22
- [Qemu-devel] [PATCHv4 9/9] migration: use XBZRLE only after bulk stage, Peter Lieven, 2013/03/22
- [Qemu-devel] [PATCHv4 4/9] bitops: use vector algorithm to optimize find_next_bit(), Peter Lieven, 2013/03/22
- [Qemu-devel] [PATCHv4 6/9] migration: add an indicator for bulk state of ram migration, Peter Lieven, 2013/03/22
- [Qemu-devel] [PATCHv4 2/9] cutils: add a function to find non-zero content in a buffer, Peter Lieven, 2013/03/22