Hello, I'm experiencing an issue with udev and hotplugging on number of servers I administer so I'm hoping someone can shed some light on this. Apparently it keeps reading /proc/stat over and over again, invoking hundreds of processes like: root 22362 0.0 0.0 2232 1052 ? S 13:50 0:00 /bin/sh /sbin/hotplug uids root 22365 0.0 0.0 1552 396 ? S 13:50 0:00 /etc/hotplug.d/default/20-hal.hotplug uids root 22367 0.0 0.0 2232 1052 ? S 13:50 0:00 /bin/sh /sbin/hotplug uids root 22370 0.0 0.0 1552 396 ? S 13:50 0:00 /etc/hotplug.d/default/20-hal.hotplug uids root 22372 0.0 0.0 2232 1052 ? S 13:50 0:00 /bin/sh /sbin/hotplug uids root 22373 0.0 0.0 2232 1052 ? S 13:50 0:00 /bin/sh /sbin/hotplug uids root 22378 0.0 0.0 1552 396 ? S 13:50 0:00 /etc/hotplug.d/default/20-hal.hotplug uids root 22381 0.0 0.0 1552 396 ? S 13:50 0:00 /etc/hotplug.d/default/20-hal.hotplug uids root 22382 0.0 0.0 2232 1052 ? S 13:50 0:00 /bin/sh /sbin/hotplug uids root 22386 0.0 0.0 1552 396 ? S 13:50 0:00 /etc/hotplug.d/default/20-hal.hotplug uids root 22390 0.0 0.0 2232 1052 ? S 13:50 0:00 /bin/sh /sbin/hotplug uids root 22395 0.0 0.0 1552 396 ? S 13:50 0:00 /etc/hotplug.d/default/20-hal.hotplug uids root 22400 0.0 0.0 2232 1052 ? S 13:50 0:00 /bin/sh /sbin/hotplug uids root 22403 0.0 0.0 1552 396 ? S 13:50 0:00 /etc/hotplug.d/default/20-hal.hotplug uids root 22407 0.0 0.0 2232 1052 ? S 13:50 0:00 /bin/sh /sbin/hotplug uids root 22411 0.0 0.0 1552 396 ? S 13:50 0:00 /etc/hotplug.d/default/20-hal.hotplug uids root 22415 0.0 0.0 2232 1052 ? S 13:50 0:00 /bin/sh /sbin/hotplug uids root 22420 0.0 0.0 1552 396 ? S 13:50 0:00 /etc/hotplug.d/default/20-hal.hotplug uids root 22421 0.0 0.0 2232 1052 ? S 13:50 0:00 /bin/sh /sbin/hotplug uids root 22424 0.0 0.0 2232 1052 ? S 13:50 0:00 /bin/sh /sbin/hotplug uids root 22427 0.0 0.0 1552 396 ? S 13:50 0:00 /etc/hotplug.d/default/20-hal.hotplug uids root 22430 0.0 0.0 1552 396 ? S 13:50 0:00 /etc/hotplug.d/default/20-hal.hotplug uids root 22434 0.0 0.0 2232 1052 ? S 13:50 0:00 /bin/sh /sbin/hotplug uids root 22438 0.0 0.0 1552 396 ? S 13:50 0:00 /etc/hotplug.d/default/20-hal.hotplug uids root 22439 0.0 0.0 2232 1052 ? S 13:50 0:00 /bin/sh /sbin/hotplug uids root 22443 0.0 0.0 2232 1052 ? S 13:50 0:00 /bin/sh /sbin/hotplug uids root 22447 0.0 0.0 1552 396 ? S 13:50 0:00 /etc/hotplug.d/default/20-hal.hotplug uids root 22450 0.0 0.0 1552 396 ? S 13:50 0:00 /etc/hotplug.d/default/20-hal.hotplug uids root 22453 0.0 0.0 2232 1052 ? S 13:50 0:00 /bin/sh /sbin/hotplug uids root 22457 0.0 0.0 1552 396 ? S 13:50 0:00 /etc/hotplug.d/default/20-hal.hotplug uids root 22460 0.0 0.0 2232 1052 ? S 13:50 0:00 /bin/sh /sbin/hotplug uids root 22467 0.0 0.0 1552 396 ? S 13:50 0:00 /etc/hotplug.d/default/20-hal.hotplug uids Strace for couple of seconds shows following: http://pastebin.org/16521 /var/log/messages is full of only this: Sep 6 18:41:13 ki udevd[29080]: udev done! Sep 6 18:41:16 ki udevd[29080]: udev done! Sep 6 18:41:18 ki udevd[29080]: udev done! Sep 6 18:41:18 ki udevd[29080]: udev done! Sep 6 18:41:19 ki udevd[29080]: udev done! Sep 6 18:41:22 ki udevd[29080]: udev done! /proc/stat # cat /proc/stat cpu 11458835 600250 4801260 34738235 3061241 17237 1368609 0 0 cpu0 1168306 41683 488778 4863945 285438 634 157006 0 0 cpu1 1150829 43370 487201 4873639 292977 720 157055 0 0 cpu2 1608174 45898 706976 4197142 289228 1409 156841 0 0 cpu3 1616953 44795 705236 4210027 269132 573 158955 0 0 cpu4 1066992 43732 464962 4927574 324869 1108 176520 0 0 cpu5 1146562 43855 491779 4860184 287530 678 175139 0 0 cpu6 2082830 291156 752676 2639122 1045792 11467 182594 0 0 cpu7 1618185 45756 703648 4166599 266270 645 204496 0 0 intr 206548530 43 2 0 5 12 0 0 0 44 0 0 0 7 0 622614 0 0 0 0 0 0 3178 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 13018109 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 209663 34722627 ctxt 349750043 btime 1252449906 processes 10483879 procs_running 3 procs_blocked 7 I'm at loss why is this happening, could it be hardware malfunction of some kind ? It should be important to note that this happens across multiple servers (10+) almost daily. With anticipation, Nick -- To unsubscribe from this list: send the line "unsubscribe linux-hotplug" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
