Sorry, forget to say kernel version and mdadm version [root@storageqe-19 home]# uname -r 3.18.1 [root@storageqe-19 home]# mdadm --version mdadm - v3.3.2 - 21st August 2014 ----- Original Message ----- > From: "Xiao Ni" <xni@xxxxxxxxxx> > To: "Chris Murphy" <chris@xxxxxxxxxxxxxxxxx> > Cc: linux-raid@xxxxxxxxxxxxxxx, eguan@xxxxxxxxxx, "Jes Sorensen" <jes.sorensen@xxxxxxxxxx> > Sent: Friday, December 19, 2014 4:14:47 PM > Subject: Re: indefinite hang when growing/reshaping > > Hi all > > There is the same problem. I can reproduce with the same steps. And > I can reproduce this in a different way too. I don't know whether it's > the same problem, but the result is the same. > > The different steps are as follows: > > mdadm -CR /dev/md0 -l5 -n7 /dev/sda1 /dev/sdb1 /dev/sdc1 /dev/sdd1 /dev/sde1 > /dev/sdf1 /dev/sdh1 -x1 /dev/sdi1 --assume-clean --bitmap=internal > mdadm --grow -l0 /dev/md0 --backup-file=tmp0 > cat /proc/mdstat > Personalities : [raid6] [raid5] [raid4] [raid1] [raid0] > md0 : active raid5 loop3[4] loop2[3] loop1[1] loop0[0] > 2045952 blocks super 1.2 level 5, 512k chunk, algorithm 2 [4/4] [UUUU] > [>....................] reshape = 0.0% (0/1022976) finish=5.8min > speed=2818K/sec > > unused devices: <none> > > There is speed 2818K/sec, but if you look by iostat, there is no speed > about the disks. > > > And there is a workaround: > mdadm -CR /dev/md0 -l5 -n7 /dev/sda1 /dev/sdb1 /dev/sdc1 /dev/sdd1 > /dev/sde1 /dev/sdf1 /dev/sdh1 -x1 /dev/sdi1 --assume-clean > --bitmap=internal > mdadm --grow -l0 /dev/md0 > > If we don't specify the backup file. The reshape can finish correctly. > > Best Regards > Xiao > > ----- Original Message ----- > > From: "Chris Murphy" <chris@xxxxxxxxxxxxxxxxx> > > To: linux-raid@xxxxxxxxxxxxxxx > > Sent: Thursday, December 18, 2014 6:20:50 AM > > Subject: indefinite hang when growing/reshaping > > > > If this is user error I'd expect a discreet error message, but I don't > > get one, just a hang during the reshape following successful --grow > > command (going from 3x device raid5 to 4x device raid5). > > > > # cat /proc/mdstat > > Personalities : [raid6] [raid5] [raid4] > > md127 : active raid5 loop3[4] loop2[3] loop1[1] loop0[0] > > 2095104 blocks super 1.2 level 5, 512k chunk, algorithm 2 [4/4] > > [UUUU] > > [>....................] reshape = 0.0% (0/1047552) > > finish=7.0min speed=2402K/sec > > > > Reproduces with: > > kernel-3.17.6-300.fc21.x86_64 > > mdadm-3.3.2-1.fc21.x86_64 > > and > > 3.18.0-2.fc22.i686+debug > > mdadm-3.3.2-1.fc21.i686 > > > > Details are here: > > https://bugzilla.kernel.org/show_bug.cgi?id=89851 > > > > -- > > Chris Murphy > > -- > > 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 > > > -- > 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 > -- 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
