Date: Thu, 24 Oct 2013 11:09:24 +0100 (BST) From: Anton Shterenlikht <mexas@bris.ac.uk> To: freebsd-ia64@freebsd.org, jhb@freebsd.org, mexas@bris.ac.uk Cc: davide@freebsd.org, freebsd-current@freebsd.org Subject: Re: deadlkres: possible deadlock detected for 0xe000000012aed200, blocked for 900014 ticks Message-ID: <201310241009.r9OA9OPM037512@mech-cluster241.men.bris.ac.uk> In-Reply-To: <201310231456.56359.jhb@freebsd.org>
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>From jhb@freebsd.org Wed Oct 23 21:10:30 2013 >> >> >> >> http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/183007 >> > >> >Hmm, unfortunately it seems like all the stack traces did not work. There >are >> >lots of threads blocked on VM-related locks, and CPU 0 is running >vm_daemon. >> >Probably would need a stack trace of that thread to see what it is doing >(this >> >is part of why a real crash dump would be far better than a textdump as you >> >can get more info after the crash instead of having to know in advance >> >everything you want). I saw earlier you had a thread to get textdumps to >> >work. Did you ever have regular crashdumps working? >> >> No. I have another deadlock panic when savecore >> is running. That panic dumps core, then on reboot >> when savecore is running I get another deadlock >> panic, and so on. However, I do get about 8-10gb vmcore* >> files before the panic happens. Presumably these >> are truncated somehow. >> Do you think these incomplete vmcores can still >> be useful? If you send some instructions on what >> to try, I'll give it a go, or I can post a vmcore >> somewhere. > >Does you get corresponding core.txt.N files from crashinfo? yes: # ls -al /var/crash/*6* -rw------- 1 root wheel 27206 Oct 24 09:57 /var/crash/core.txt.6 -rw------- 1 root wheel 543 Oct 24 09:26 /var/crash/info.6 -rw------- 1 root wheel 5853138944 Oct 24 09:31 /var/crash/vmcore.6 # I added it to the PR: http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/183007 Is this any use? Also, since the panic is perfectly reproducible, I can cause it again, and run some commands in ddb, if you give explicit instructions. Many thanks Anton
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