diff options
| -rw-r--r-- | qemu-img.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/qemu-img.c b/qemu-img.c index 6949b73ca5..5df66fe661 100644 --- a/qemu-img.c +++ b/qemu-img.c @@ -3559,20 +3559,23 @@ static void bench_cb(void *opaque, int ret) } while (b->n > b->in_flight && b->in_flight < b->nrreq) { + int64_t offset = b->offset; + /* blk_aio_* might look for completed I/Os and kick bench_cb + * again, so make sure this operation is counted by in_flight + * and b->offset is ready for the next submission. + */ + b->in_flight++; + b->offset += b->step; + b->offset %= b->image_size; if (b->write) { - acb = blk_aio_pwritev(b->blk, b->offset, b->qiov, 0, - bench_cb, b); + acb = blk_aio_pwritev(b->blk, offset, b->qiov, 0, bench_cb, b); } else { - acb = blk_aio_preadv(b->blk, b->offset, b->qiov, 0, - bench_cb, b); + acb = blk_aio_preadv(b->blk, offset, b->qiov, 0, bench_cb, b); } if (!acb) { error_report("Failed to issue request"); exit(EXIT_FAILURE); } - b->in_flight++; - b->offset += b->step; - b->offset %= b->image_size; } } |