Bruce Dubbs <bruce.dubbs@xxxxxxxxx> writes: > I'm still trying to figure out why some of the mdadm regression tests > fail. I started looking at tests/00raid1: > > # ./test --tests=00raid1 > > It is nice that ./test is a bash script so it is easy to do some debugging. > > The test script looks like: > > # create a simple mirror > # test version0, version1, and no super > # test resync and recovery. > > mdadm -CR $md0 -l 1 -n2 $dev0 $dev1 > check resync > check raid1 > testdev $md0 1 $mdsize1a 64 > mdadm -S $md0 > > # now with version-0.90 superblock, spare > mdadm -CR $md0 -e0.90 --level=raid1 -n3 -x2 $dev0 missing missing $dev1 $dev2 > check recovery > check raid1 > testdev $md0 1 $mdsize0 64 > mdadm -S $md0 > > # now with no superblock > mdadm -B $md0 -l mirror -n2 $dev0 $dev1 > check resync > check raid1 > testdev $md0 1 $size 1 > #### Point 1 > mdadm -S $md0 > > # again, but with no resync > mdadm -B $md0 -l 1 --assume-clean -n2 $dev0 $dev1 > check raid1 > check nosync > testdev $md0 1 $size 1 > mdadm -S $md0 > exit 0 > > What I did was add a couple of 'cat /proc/mdstat' commands where the > script was failing. At Point 1 above, I got: > > ++ cat /proc/mdstat > Personalities : [raid1] [raid10] [raid6] [raid5] [raid4] [multipath] > md127 : inactive md0[0](S) > 19904 blocks > > md0 : active raid1 loop1[1] loop0[0] > 20000 blocks super non-persistent [2/2] [UU] > [==>..................] resync = 12.5% (2688/20000) > finish=0.1min speed=2688K/sec > > > The line with resync looked suspicious so at that point I added a > 'sleep 10' command. The test now passes. > > The full log is at > http://anduin.linuxfromscratch.org/~bdubbs/files/mdadm-test1.log > > Does anyone know what is going on to need this sleep in order for this > test to pass? It sounds to like the thing hangs if you try to stop the array before the resync completes. That could be a race in the kernel code. Jes -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
