The major change is to replace "!save_page_use_compression()" with
"xbzrle_enabled" to make it clear.
Reasonings:
(1) When compression enabled, "!save_page_use_compression()" is exactly the
same as checking "xbzrle_enabled".
(2) When compression disabled, "!save_page_use_compression()" always return
true. We used to try calling the xbzrle code, but after this change we
won't, and we shouldn't need to.
Since at it, drop the xbzrle_enabled check in xbzrle_cache_zero_page()
because with this change it's not needed anymore.
Signed-off-by: Peter Xu <pet...@redhat.com>
---
migration/ram.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
diff --git a/migration/ram.c b/migration/ram.c
index d8cf7cc901..fc59c052cf 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -741,10 +741,6 @@ void mig_throttle_counter_reset(void)
*/
static void xbzrle_cache_zero_page(RAMState *rs, ram_addr_t current_addr)
{
- if (!rs->xbzrle_enabled) {
- return;
- }
-
/* We don't care if this fails to allocate a new cache page
* as long as it updated an old one */
cache_insert(XBZRLE.cache, current_addr, XBZRLE.zero_target_page,
@@ -2301,7 +2297,7 @@ static int ram_save_target_page(RAMState *rs,
PageSearchStatus *pss)
/* Must let xbzrle know, otherwise a previous (now 0'd) cached
* page would be stale
*/
- if (!save_page_use_compression(rs)) {
+ if (rs->xbzrle_enabled) {
XBZRLE_cache_lock();
xbzrle_cache_zero_page(rs, block->offset + offset);
XBZRLE_cache_unlock();
--
2.32.0
