We only need to synchronize the bitmap when the number of dirty pages is low.
Not every time that we call the function.
Signed-off-by: Juan Quintela <quint...@redhat.com>
---
arch_init.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/arch_init.c b/arch_init.c
index 3c38a52..b08c615 100644
--- a/arch_init.c
+++ b/arch_init.c
@@ -348,8 +348,6 @@ static int ram_save_iterate(QEMUFile *f, void *opaque)
int i;
uint64_t expected_time;
- memory_global_sync_dirty_bitmap(get_system_memory());
-
bytes_transferred_last = bytes_transferred;
bwidth = qemu_get_clock_ns(rt_clock);
@@ -398,7 +396,13 @@ static int ram_save_iterate(QEMUFile *f, void *opaque)
DPRINTF("ram_save_live: expected(" PRIu64 ") <= max(" PRIu64 ")?\n",
expected_time, migrate_max_downtime());
- return expected_time <= migrate_max_downtime();
+ if (expected_time <= migrate_max_downtime()) {
+ memory_global_sync_dirty_bitmap(get_system_memory());
+ expected_time = ram_save_remaining() * TARGET_PAGE_SIZE / bwidth;
+
+ return expected_time <= migrate_max_downtime();
+ }
+ return 0;
}
static int ram_save_complete(QEMUFile *f, void *opaque)
--
1.7.10.4
