XBZRLE encoded migration introduced a MRU page cache
meachnism. Unfortunately, cached items where never freed in
case of a collision in the page cache on cache_insert().
This lead to out of memory conditions during XBZRLE migration
if the page cache was small and there where a lot of collisions
in the cache.
Signed-off-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Orit Wasserman <owasserm@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Juan Quintela <quintela@redhat.com>
(cherry picked from commit
32a1c08b60a8ac0e63b54a5793a26b5e32b36618)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
/* actual update of entry */
it = cache_get_by_addr(cache, addr);
+ /* free old cached data if any */
+ g_free(it->it_data);
+
if (!it->it_data) {
cache->num_items++;
}