Thank you Ellenberg. now I learn more things..^_^ should I put this at Redhat Bugzila? because it's always reproducible with RH-FC3, "demsetup resume target &" still not work.. 2005/9/18, Lars Ellenberg <Lars.Ellenberg@linbit.com>: > / 2005-09-17 14:27:10 +0800 > it is not "dead", it is in "uninteruptible sleep". > that is a big difference. > > yes, those are the kernel threads responsible for the sync. > there are initially two of them per cpu. > if they (try to) sync to some device mapper target which is suspended, > they themselves get suspended. > this can hang the system: no io possible, nothing possible > anymore that needs io... > > > -bash-3.00# ps x > > PID TTY STAT TIME COMMAND > > 1 ? S 0:01 init [2] > > 2 ? S 0:00 [migration/0] > > 3 ? SN 0:00 [ksoftirqd/0] > > 4 ? S< 0:00 [events/0] > > 5 ? S< 0:00 [khelper] > > 6 ? S< 0:00 [kthread] > > 8 ? S< 0:00 [kacpid] > > 70 ? S< 0:00 [kblockd/0] > > 73 ? S< 0:00 [khubd] > > 129 ? S 0:00 [pdflush] > > 130 ? D 0:00 [pdflush] > > 132 ? S< 0:00 [aio/0] > > 131 ? S 0:00 [kswapd0] > > 134 ? S< 0:00 [xfslogd/0] > > 133 ? S 0:00 [cifsoplockd] > > 135 ? S< 0:00 [xfsdatad/0] > > 136 ? S 0:00 [xfsbufd] > > 723 ? S< 0:00 [kseriod] > > 773 ? S 0:00 [scsi_eh_0] > > 777 ? S< 0:00 [ata/0] > > 801 ? S< 0:00 [kcryptd/0] > > 934 ? S< 0:00 [kcopyd] > > 1330 ? Ss 0:00 syslogd -m 0 > > 1334 ? Ss 0:00 klogd -x > > 1343 ? Ss 0:00 /usr/httpd/bin/httpd > > 1353 ? Ss 0:00 crond > > 1359 ? Ss 0:00 /bin/profamd > > 1479 tty1 Ss 0:00 -bash > > 1481 tty2 Ss+ 0:00 -bash > > 1483 tty3 Ss+ 0:00 /sbin/mingetty tty3 > > 1485 tty4 Ss+ 0:00 /sbin/mingetty tty4 > > 1487 tty5 Ss+ 0:00 /sbin/mingetty tty5 > > 1903 ? S 0:00 [xfssyncd] > > 1915 tty1 D+ 0:00 sync > > 2037 pts/0 R+ 0:00 ps x > > -- > : Lars Ellenberg Tel +43-1-8178292-0 : > : LINBIT Information Technologies GmbH Fax +43-1-8178292-82 : > : Schoenbrunner Str. 244, A-1120 Vienna/Europe http://www.linbit.com : > _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
