Date: Sun, 11 Jan 2009 17:16:05 +0000 From: Pete French <petefrench@ticketswitch.com> To: freebsd-stable@freebsd.org Subject: Lock order reversals using bce in 7.1 Message-ID: <E1LM3uv-0001CD-7X@dilbert.ticketswitch.com> In-Reply-To: <E1LM3AF-0000yL-Nh@dilbert.ticketswitch.com>
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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
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
The output of trace, show pcpu, show locks, show allpcpu and show alllocks
are shown in the following images:
http://www.twisted.org.uk/~pete/71_locks_trace.png
http://www.twisted.org.uk/~pete/71_pcpu_alllocks.png
http://www.twisted.org.uk/~pete/71_allpcpu1.png
http://www.twisted.org.uk/~pete/71_allpcpu2.png
I am going to revent the machine back to a normal kernel now - is there
anything I might be able to do to stop this, or do I need to roll everything
back to 7.0 ?
cheers,
-pete.
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