Date: Fri, 15 Oct 2004 14:35:47 +0200 From: Guido van Rooij <guido@gvr.org> To: Peter Jeremy <PeterJeremy@optushome.com.au> Cc: freebsd-current@freebsd.org Subject: Re: 5.3-BETA7 install cd: kernel trap 12 with interrupts disabled Message-ID: <20041015123547.GA23221@gvr.gvr.org> In-Reply-To: <20041015104856.GB45863@cirb503493.alcatel.com.au> References: <20041013214911.GD986@green.homeunix.org> <Pine.NEB.3.96L.1041014045808.84384U-100000@fledge.watson.org> <20041015073118.GA19660@gvr.gvr.org> <20041015104856.GB45863@cirb503493.alcatel.com.au>
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On Fri, Oct 15, 2004 at 08:48:56PM +1000, Peter Jeremy wrote: > On Fri, 2004-Oct-15 09:31:18 +0200, Guido van Rooij wrote: > >I am beginning to wonder if we should have a boot option that enables > >a thorough memtest from within the kernel...(e.g. boot -m). > > What do you define as "thorough"? A thorough memory test requires > intimate knowledge of the physical memory cell layout (to ensure > that pattern tests make sense) as well as the ability to control > temperature, the supply voltage, thresholds and timings (to detect > marginal conditions). > > "make buildworld" is probably the best memory test we're likely to > find. The speed is on a par with Memtest86 as well. Add/vary > '-k' for additional coverage. > The problem started with my system where FreeBSD would consitently panic at the same point during installation (at an early point). The funny thing is that a W2K install would at least run much longer (I never completed it so I never had it actually write to disk). A make buildworld cannot be used in sich a scenario. A nice memtester that could be called from the bootloader would have been handy. -Guido
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