Date: Mon, 12 Jan 2009 10:38:04 +0000 From: Gavin Atkinson <gavin@FreeBSD.org> To: Pete French <petefrench@ticketswitch.com> Cc: freebsd-stable@FreeBSD.org Subject: Re: Lock order reversals using bce in 7.1 Message-ID: <1231756684.59797.1.camel@buffy.york.ac.uk> In-Reply-To: <E1LM3uv-0001CD-7X@dilbert.ticketswitch.com> References: <E1LM3uv-0001CD-7X@dilbert.ticketswitch.com>
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On Sun, 2009-01-11 at 17:16 +0000, Pete French wrote: > Here is a better set of images. This machine was compiled > with the following config file: > > include GENERIC > ident DEBUG > > options KDB > options DDB > options SW_WATCHDOG > options DEBUG_VFS_LOCKS > options MUTEX_DEBUG > options WITNESS > options WITNESS_KDB You don't want WITNESS_KDB, but WITNESS_SKIPSPIN would probably be sensible to include. > options LOCK_PROFILING > options INVARIANTS > options INVARIANT_SUPPORT > options DIAGNOSTIC > > On booting it almost immediately does this: > > http://www.twisted.org.uk/~pete/71_lor.png That's due to WITNESS_KDB and probably unrelated to your problems. Gavin
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