Date: Sat, 20 Oct 2007 16:27:24 +0800 From: Eugene Grosbein <eugen@kuzbass.ru> To: Alfred Perlstein <alfred@freebsd.org> Cc: freebsd-stable@freebsd.org, Oleg Derevenetz <oleg@vsi.ru> Subject: Re: kern/104406: [ufs] Processes get stuck in "ufs" state under persistent CPU load Message-ID: <20071020082724.GA87825@svzserv.kemerovo.su> In-Reply-To: <20071019220501.GL31826@elvis.mu.org> References: <027d01c8125c$73d4db80$c8c55358@delloleg> <20071019220501.GL31826@elvis.mu.org>
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On Fri, Oct 19, 2007 at 03:05:01PM -0700, Alfred Perlstein wrote: > > Can anyone take a look on PR kern/104406 ? I got repeatable hang situation, > > but I can't obtain a kernel dump to get result of all show commands from > > here: > > > > http://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kerneldebug-deadlocks.html > > > > After my break to debugger using Ctrl+Alt+Esc sequence and entering a > > "panic" command kernel does not wrote a kernel dump but seems to hang. Can > > anyone describe how to obtain a kernel dump in this situation, or at least > > say - which output of show commands need in first place to debug this ? > > Output of all suggested commands is huge and I afraid of making mistake > > when carrying this output from screen to list of paper and back :-) This very easy to reproduce [ufs] uninterruptable deadlock for both of RELENG_6 and RELENG_7. Look at this PR: http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/107439 The PR is closed but the problem is still here with 7.0-PRERELEASE and, perhaps, CURRENT. Eugene
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