Date: Sun, 03 Jul 2005 10:38:58 +0200 From: Philippe PEGON <Philippe.Pegon@crc.u-strasbg.fr> To: Kris Kennaway <kris@obsecurity.org> Cc: Marc Olzheim <marcolz@stack.nl>, freebsd-stable@freebsd.org Subject: Re: Today's RELENG_5_4 and 'lock cmpxchgl' Message-ID: <42C7A422.30709@crc.u-strasbg.fr> In-Reply-To: <20050701182946.GA99767@xor.obsecurity.org> References: <20050701101458.GA1193@stack.nl> <20050701104139.GB1193@stack.nl> <20050701130335.GA2040@stack.nl> <20050701182946.GA99767@xor.obsecurity.org>
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Kris Kennaway a écrit : > On Fri, Jul 01, 2005 at 03:03:35PM +0200, Marc Olzheim wrote: > >>On Fri, Jul 01, 2005 at 12:41:39PM +0200, Marc Olzheim wrote: >> >>>On Fri, Jul 01, 2005 at 12:14:58PM +0200, Marc Olzheim wrote: >>> >>>>Somehow, this sounds familiar, i.e.: the "lock cmpxchgl": >>>> >>>>Fatal trap 12: page fault while in kernel mode >>> >>>... >>> >>>>Stopped at 0xc05160c3 = knote+0x27: lock cmpxchgl %ecx,0x1c(%edx) >>> >>>Somehow I think I solved this last time by activating 'INVARIANTS'... >>>I'll try that now. >> >>Let's paraphrase: >> >>I think i solved this last time by activating 'INVARIANTS'... >> >>Anyway, tried that and yes, it didn't crash in the last few hours, so I >>guess it works. Without INVARIANTS, it crashed within seconds. >> >>On the downside, my Gigabit performance dropped from 99 MB/sec to 80 >>MB/sec because of INVARIANTS. > > > The panic appears to be an instance of a known bug in 5.4 (and > INVARIANTS will not fix it, but may just delay the inevitable by > changing timings). See Doug White's recent emails which point to a > patch you should test. If you think about this mail : http://lists.freebsd.org/mailman/htdig/freebsd-stable/2005-June/016165.html and follow the thread, you will see that this patch doesn't solve the problem. The last mail which I can see from doug white about this problem is : http://lists.freebsd.org/mailman/htdig/freebsd-stable/2005-June/016495.html for the moment, it seems that there is no solution for 5.x > > Kris -- Philippe PEGON
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