@@ -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();
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 <peterx@redhat.com> --- migration/ram.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-)