On Wed, Aug 28, 2013 at 7:14 PM, Francis Moreau <francis.moro@xxxxxxxxx> wrote: > Hello Neil, > > > Sorry for the late reply. > > On Mon, Aug 5, 2013 at 8:59 AM, NeilBrown <neilb@xxxxxxx> wrote: >> On Wed, 31 Jul 2013 16:30:34 +0200 Francis Moreau <francis.moro@xxxxxxxxx> >> wrote: >> >>> Hello list, >>> >>> I thought that using "--takeover" would hint mdmon to replace existing >>> mdmon process, and therefore the old one would exit somehow. >>> >>> However after several "mdmon --takeover" I can see this: >>> $ ps aux | grep dmon >>> root 233 0.0 0.2 80388 10752 ? SLsl 14:02 0:00 @dmon >>> --offroot md127 >>> root 3326 0.0 0.2 14920 10820 ? SLsl 15:16 0:00 mdmon >>> --takeover md127 >>> root 3343 0.0 0.2 14920 10820 ? SLsl 15:17 0:00 mdmon >>> --takeover md127 >>> >>> Is this expected ? >>> >>> Thanks. >> >> Nope. That's not expected. >> >> mdmon should send SIGTERM to the old mdmon and then wait for it to exit. >> >> If the new and old mdmon were compiled different and look for the pid file in >> different directories that might explain what you see. >> >> If you compile mdadm from source it will use /run/mdadm. However if your >> distro doesn't have /run the the distro-provided mdadm will be compiled >> differently. >> > > It doesn't to be the case. > > Actually sending SIGTERM manually to mdmon has no effects. > > > # mdadm --version > mdadm - v3.2.6 - 25th October 2012 > > # ps aux | grep dmon > root 235 0.1 1.0 80612 10976 ? SLsl 19:08 0:00 @dmon > --offroot md127 > root 339 0.0 1.0 15044 10944 ? SLsl 19:08 0:00 > /sbin/mdmon --takeover md127 > > # cat /run/mdadm/md127.pid > 339 > > # kill -SIGTERM 339 > # ps aux | grep dmon > root 235 0.0 1.0 80612 10976 ? SLsl 19:08 0:00 @dmon > --offroot md127 > root 339 0.0 1.0 15044 10944 ? SLsl 19:08 0:00 > /sbin/mdmon --takeover md127 > > # ps aux | grep dmon > root 235 0.0 1.0 80612 10976 ? SLsl 19:08 0:00 @dmon > --offroot md127 > root 339 0.0 1.0 15044 10944 ? SLsl 19:08 0:00 > /sbin/mdmon --takeover md127 > root 2352 0.1 1.0 15076 10976 ? SLsl 19:12 0:00 mdmon > --takeover /dev/md127 > > # cat /run/mdadm/md127.pid > 2352 > > # pkill -SIGTERM mdmon > [root@localhost ~]# ps aux | grep dmon > root 235 0.0 1.0 80612 10976 ? SLsl 19:08 0:00 @dmon > --offroot md127 > root 339 0.0 1.0 80580 10944 ? SLsl 19:08 0:00 > /sbin/mdmon --takeover md127 > root 2352 0.0 1.0 80612 10976 ? SLsl 19:12 0:00 mdmon > --takeover /dev/md127 > > Can't you reproduce ? > and running latest git head is even worse, mdmon can't be started at all: # mdadm --version mdadm - v3.3-rc2-58-g2cdd5ce - 28th August 2013 # ls /run/mdadm/ autorebuild.pid map # mdmon --takeover /dev/md127 # ps aux | grep dmon root 2347 0.0 0.0 9680 848 ttyS0 S+ 21:40 0:00 grep --color dmon # ls /run/mdadm/ autorebuild.pid map -- Francis -- 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
