diff options
Diffstat (limited to 'migration/ram.c')
| -rw-r--r-- | migration/ram.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/migration/ram.c b/migration/ram.c index 701a1e6b54..ac30e9ea50 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -69,8 +69,6 @@ /* 0x80 is reserved in migration.h start with 0x100 next */ #define RAM_SAVE_FLAG_COMPRESS_PAGE 0x100 -static uint8_t *ZERO_TARGET_PAGE; - static inline bool is_zero_range(uint8_t *p, uint64_t size) { return buffer_is_zero(p, size); @@ -86,6 +84,8 @@ static struct { /* Cache for XBZRLE, Protected by lock. */ PageCache *cache; QemuMutex lock; + /* it will store a page full of zeros */ + uint8_t *zero_target_page; } XBZRLE; /* buffer used for XBZRLE decoding */ @@ -512,7 +512,7 @@ static void xbzrle_cache_zero_page(RAMState *rs, ram_addr_t current_addr) /* 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, ZERO_TARGET_PAGE, + cache_insert(XBZRLE.cache, current_addr, XBZRLE.zero_target_page, rs->bitmap_sync_count); } @@ -1456,10 +1456,11 @@ static void ram_migration_cleanup(void *opaque) cache_fini(XBZRLE.cache); g_free(XBZRLE.encoded_buf); g_free(XBZRLE.current_buf); - g_free(ZERO_TARGET_PAGE); + g_free(XBZRLE.zero_target_page); XBZRLE.cache = NULL; XBZRLE.encoded_buf = NULL; XBZRLE.current_buf = NULL; + XBZRLE.zero_target_page = NULL; } XBZRLE_cache_unlock(); migration_page_queue_free(rs); @@ -1880,7 +1881,7 @@ static int ram_state_init(RAMState *rs) if (migrate_use_xbzrle()) { XBZRLE_cache_lock(); - ZERO_TARGET_PAGE = g_malloc0(TARGET_PAGE_SIZE); + XBZRLE.zero_target_page = g_malloc0(TARGET_PAGE_SIZE); XBZRLE.cache = cache_init(migrate_xbzrle_cache_size() / TARGET_PAGE_SIZE, TARGET_PAGE_SIZE); |