Date: Wed, 24 Mar 2004 15:23:36 -0500 From: Don Bowman <don@sandvine.com> To: 'Kris Kennaway' <kris@obsecurity.org>, Don Bowman <don@sandvine.com> Cc: "'current@freebsd.org'" <current@freebsd.org> Subject: RE: LOR on current Message-ID: <FE045D4D9F7AED4CBFF1B3B813C85337045D86F3@mail.sandvine.com>
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From: Kris Kennaway [mailto:kris@obsecurity.org] > On Wed, Mar 24, 2004 at 02:10:40PM -0500, Don Bowman wrote: > > From: Kris Kennaway [mailto:kris@obsecurity.org] > > > On Wed, Mar 24, 2004 at 11:04:03AM -0500, Don Bowman wrote: > > > > From: Don Bowman [mailto:don@sandvine.com] > > > > > So my machine which has been locking up daily under current > > > > > (cvs up from saturday) this time showed this message to > > > > > serial before locking up: > > > > > > > > And I got another, but this one it recovered from after a ~20s > > > > hang. > > > > > > > > machine has 4GB ram, adaptec ASR raid, 2 2.8GHz xeon with > > > > symmetric multi threading yielding 4 processor contexts. > > > > The only process it runs (other than system related stuff) > > > > is postgresql. > > > > > > You really need to do some research before submitting the > 500th copy > > > of 2 non-bug reports :-) > > > > I was hoping that it would jog someone's memory. I've been > > trying to do some research, but have not found a patch to > > the problem. The machine locks up entirely, no debugger or anything, > > so i'm at a bit of a loss not having debugged these before. > > > > is it expected that one can get a core or panic or into db > > at this time? > > > > As you can imagine, searching for lock order reversal returns > > a lot of hits. > > is it 'kern/60581: lock order reversal'? this indicates its > > a 'known false positive'... But my machine locks up solid. > > So i think that's not it. > > Right, I think that's not the cause of your lockup :) Not being one to believe in coincidences... I'm typing on the serial console. The machine halts, i can no longer type. some seconds pass, out pops that message. This time too it returned. Most times (when i run two postgresql vacuums simulatenously for example), that's the end of it. I will continue to investigate.
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