We can't depend on the test_bio being the same every time it is submitted. Need to reset some of the fields in the bio each time. --- diff/drivers/md/dm-mpath.c 2004-01-13 15:09:07.000000000 -0600 +++ source/drivers/md/dm-mpath.c 2004-01-13 15:09:54.000000000 -0600 @@ -215,6 +215,11 @@ if (down_trylock(&p->test_lock)) return; /* last test io still pending */ + p->test_bio->bi_sector = 0; + p->test_bio->bi_bdev = p->dev->bdev; + p->test_bio->bi_size = bdev_hardsect_size(p->dev->bdev); + p->test_bio->bi_idx = 0; + generic_make_request(p->test_bio); }
