Date: Sun, 21 Oct 2012 17:28:49 -0700 From: Kevin Oberman <kob6558@gmail.com> To: David Wolfskill <david@catwhisker.org> Cc: Alexander Motin <mav@freebsd.org>, stable@freebsd.org Subject: Re: stable/9 @r241776 panic: REDZONE: Buffer underflow detected... Message-ID: <CAN6yY1v4FMq2d-quSi7Kbsf7-4dj2CUBF2UvU_whWq-GOUVFsg@mail.gmail.com> In-Reply-To: <20121021224648.GE1609@albert.catwhisker.org> References: <20121020141019.GW1817@albert.catwhisker.org> <20121021121356.GJ35915@deviant.kiev.zoral.com.ua> <20121021163322.GB1730@albert.catwhisker.org> <20121021164634.GC1730@albert.catwhisker.org> <20121021174054.GM35915@deviant.kiev.zoral.com.ua> <50843EB6.8030407@FreeBSD.org> <20121021202346.GB1609@albert.catwhisker.org> <5084713A.1050200@FreeBSD.org> <508477A8.2040609@FreeBSD.org> <20121021224648.GE1609@albert.catwhisker.org>
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On Sun, Oct 21, 2012 at 3:46 PM, David Wolfskill <david@catwhisker.org> wrote: > On Mon, Oct 22, 2012 at 01:31:04AM +0300, Alexander Motin wrote: >> ... >> > I've used your kernel config and my test system was unable to boot from >> > NFS, while GENERIC kernel boots fine. I haven't got panic, but boot just >> > stopped on root mounting. You have so many options specified there so I >> > can't predict which of them could cause this. Now I am trying to binary >> > search for the problematic one(s). >> >> Sorry. false alarm. I was just closed firewall in your kernel config. >> Without it my test system boots your kernel without any problem. >> ... > > OK. > > I tried the watchpoint patch mjg@ sent; as noted in my response to him, > I did not see the problem recur when I booted the resulting kernel. > > And given your observation, as well as that I've updated 4 other > stable/9 systems (sources at r241801 for 3 of them; at r241786 for the > other), none of which exhibited the problem, I suspect that something is > remarkably sensitive to the storage layout. > > Hmmm... This is starting to smell a bit like it may be tied to hardware. If you have two memory cards, you might want to try swapping them. If not, maybe let memtest86 run overnight. Yes, this is a total shot in the dark, but this one is really weird and when I see really weird, I start too look at hardware, especially memory and power supply. (And this really does not sound like power supply to me.) -- R. Kevin Oberman, Network Engineer E-mail: kob6558@gmail.com
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