if (g_atomic_int_dec_and_test(&mmap->mapcount)) {
g_mutex_lock(mmap->lock);
- if (mmap->addr != NULL) {
+ if (mmap->addr != NULL && g_atomic_int_get(&mmap->mapcount) == 0) {
if (bluesky_verbose)
g_print("Unmapped log segment %d...\n", mmap->log_seq);
munmap((void *)mmap->addr, mmap->len);