-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Peter Sopko wrote: > Hi, > > today a strange thing occurred - on both of our cluster nodes a lot of > processes suddenly started to become locked in the D state (i/o lock). This > thing has already happened once before (six months ago), but a simple reboot > helped to solve this issue. But as it appeared again, I don't want to solve > it this way again, I would like to find the reason why this is happening, > but have no idea where to start. In /var/log/messages there is nothing > unusual, the only thing is that some directories are unremoveable and a lot > of processes locked. For problems where processes are getting stuck in D state it's usually helpful to get sysrq-t data to see where the threads are stuck. Grab two sets of data a few seconds apart so that you can see if things are really stuck or just making slow progress. You can also get some information from the wchan data exposed in /proc - it's easiest to view with ps: $ ps ax -ocomm,pid,state,wchan COMMAND PID S WCHAN vim 22322 S - bash 22471 S - man 22817 S wait sh 22820 S wait sh 22821 S wait less 22826 S - bash 22839 S wait screen 23435 S pause [...] Regards, Bryn. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (GNU/Linux) Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org iD8DBQFGE5226YSQoMYUY94RAgm0AKDdPg/mcTHilSwMpd6+Meno2zBLtACgt+/j TT3MsBrg6/gpdBdPDYMEp5Q= =ADyt -----END PGP SIGNATURE----- -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
