BLKBACK_INVALID_HANDLE
BLKBACK_INVALID_HANDLE);
BLKBACK_INVALID_HANDLE);
if (pages[i]->handle == BLKBACK_INVALID_HANDLE)
pages[i]->handle = BLKBACK_INVALID_HANDLE;
pages[seg_idx]->handle = BLKBACK_INVALID_HANDLE;
pages[i]->handle = BLKBACK_INVALID_HANDLE;