On Tue, 15 May 2012 17:22:27 +0200 Maciej Naruszewicz <maciej.naruszewicz@xxxxxxxxx> wrote: > > If anyone knows of any other issues that have cropped up wit 3.2.4, please > > let me know. > > > > Thanks, > > NeilBrown > > Since mdadm-3.2.4 creating volumes using IMSM containers is impossible > (segfaults), unless the kernel is 3.1.x or higher (for instance > everything SEEMS to work in RHEL 7.0 Alpha and openSUSE 12.1). Full > story from SLES 11 SP2 (kernel-3.0.13-0.27-default) with mdadm-3.2.4 : > > $ mdadm --zero-superblock /dev/sd[cd] > $ mdadm -C /dev/md/imsm0 -a md -e imsm -n 2 /dev/sd[cd] -R > > [...] > > $ tail /var/log/messages > > May 15 17:16:10 gklab-128-174 kernel: [ 317.653470] md: bind<sdc> > May 15 17:16:10 gklab-128-174 kernel: [ 317.653519] md: bind<sdd> > May 15 17:16:11 gklab-128-174 udevd-work[5249]: '/sbin/mdadm > --detail --export /dev/md127' unexpected exit with status 0x000b > May 15 17:16:11 gklab-128-174 kernel: [ 317.701434] mdadm[5250]: > segfault at 78 ip 0000000000450c4f sp 00007fff6c99ada0 error 4 in > mdadm[400000+69000] > > $ mdadm -C /dev/md/raid1_2disks -a md -l 1 --size 1500000 -n 2 > /dev/sd[cd] -R -f > > mdadm: cannot open device: 11:0 > [...] > mdadm: cannot open device: 11:0 > [...] > Segmentation fault > > $ tail /var/log/messages > > May 15 17:18:36 gklab-128-174 kernel: [ 463.291235] mdadm[5298]: > segfault at 78 ip 0000000000450c4f sp 00007fff8ad887e0 error 4 in > mdadm[400000+69000] > > Similiar story in RHEL 6.3 Beta, those errors don't happen with kernel > >= 3.1.x though (or mdadm-3.2.3 :)). > > Maciek N Could the difference be that fact that 3.2.4 default to using /run, which doens't exist on SLES11 and may on in RHEL 6.3? If you compile with make MAP_DIR=/var/run/mdadm does it work better? However I think this will fix the crash you are seeing. diff --git a/mapfile.c b/mapfile.c index b890ed2..70ff355 100644 --- a/mapfile.c +++ b/mapfile.c @@ -404,6 +404,8 @@ void RebuildMap(void) if (ok != 0) continue; info = st->ss->container_content(st, subarray); + if (!info) + continue; if (md->devnum >= 0) path = map_dev(MD_MAJOR, md->devnum, 0); Thanks, NeilBrown
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