diff options
| -rw-r--r-- | include/qemu/queue.h | 1 | ||||
| -rw-r--r-- | migration/ram.c | 4 |
2 files changed, 5 insertions, 0 deletions
diff --git a/include/qemu/queue.h b/include/qemu/queue.h index 59fd120..ac418ef 100644 --- a/include/qemu/queue.h +++ b/include/qemu/queue.h @@ -341,6 +341,7 @@ struct { \ /* * Simple queue access methods. */ +#define QSIMPLEQ_EMPTY_ATOMIC(head) (atomic_read(&((head)->sqh_first)) == NULL) #define QSIMPLEQ_EMPTY(head) ((head)->sqh_first == NULL) #define QSIMPLEQ_FIRST(head) ((head)->sqh_first) #define QSIMPLEQ_NEXT(elm, field) ((elm)->field.sqe_next) diff --git a/migration/ram.c b/migration/ram.c index 40013e6..79c8942 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -2033,6 +2033,10 @@ static RAMBlock *unqueue_page(RAMState *rs, ram_addr_t *offset) { RAMBlock *block = NULL; + if (QSIMPLEQ_EMPTY_ATOMIC(&rs->src_page_requests)) { + return NULL; + } + qemu_mutex_lock(&rs->src_page_req_mutex); if (!QSIMPLEQ_EMPTY(&rs->src_page_requests)) { struct RAMSrcPageRequest *entry = |