Date: Fri, 16 Jan 2009 15:40:11 +0000 From: Pete French <petefrench@ticketswitch.com> To: rwatson@FreeBSD.org Cc: freebsd-stable@freebsd.org Subject: Re: Big problems with 7.1 locking up :-( Message-ID: <E1LNqnr-0005Lo-UC@dilbert.ticketswitch.com>
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> If you do INVARIANTS + WITNESS + WITNESS_SKIPSPIN, that should be good. > WITNESS does a number of things, including tracking (and being judgemental > about) lock order. One nice side effect of that tracking is that we keep > track of a lot more lock state explicitly, so DDB's "show allocks", "show > locks", etc, commands can build on that. "show lockedvnods" works without > WITNESS, though, so your results so far suggest this is likely not related to > vnode locking. Right, I've gone back to my DEBUG kernel which has a lot of options in it, including all the above. It has locked almost immediately luckily, so now I have it sitting at the debugger prompt. The output from 'show alllocks' is here: http://toybox.twisted.org.uk/~pete/71_show_alllocks.png Which of these are worth tracing ? -pte.
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