Giorgos Keramidas <keram...@ceid.upatras.gr> writes: > On Fri, 21 May 2010 09:30:05 -0700, Carl Johnson <ca...@peak.org> wrote: >> Giorgos Keramidas <keram...@ceid.upatras.gr> writes: >>> Does this lock-up happen if you leave the shell 'idle' for too long >>> over an ssh session? There may be problems with stateful connection >>> tracking between your terminal and the remote shell :-/ >> >> No, I don't think that could be the problem. I am just using ssh >> between local machines and there is no firewall between them. It also >> often seems to happen to a shell as I switch away from it to another >> one. One suspicion is that something is sending a signal to the shell >> as it switches, and bash sometimes doesn't handle that signal >> properly. >> >> I also should have mentioned that I have been running bash as my >> default shell for years under Linux and have never seen this problem >> there. >> >> Thanks for the suggestion. > > That's ok. If you can attach to the bash process with ktrace please try > to grab a ktrace file from a deadlocked shell. We may be able to see > why it gets deadlocked by running kdump(8) on the shell trace file. > > You can run a second shell under ktrace (and hope that the parent > doesn't deadlock before the traced child shell), by running: > > bash$ ktrace -f bash.trace bash --login > > When you exit from the child shell you can dump ktrace(8) events from > the bash.trace file with: > > bash$ kdump -f bash.trace > logfile 2>&1 > > Looking near the last records dumped in 'logfile' should be quite > informative if the process is dead-locked or spinning around the same > code over and over again.
Thanks for the detailed information. I have been mostly a linux user, so this is new for me. It hasn't been happening very often lately, so it might be a while now. I will definitely try to keep any hung processes around to try your suggestions. -- Carl Johnson ca...@peak.org _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
