Date: Thu, 30 Apr 2009 20:37:29 +0400 From: pluknet <pluknet@gmail.com> To: Andriy Gapon <avg@icyb.net.ua> Cc: current@freebsd.org Subject: Re: Panic "Fatal trap 18: integer divide fault while in kernel mode" Message-ID: <a31046fc0904300937q6483002fy124ed918962c925c@mail.gmail.com> In-Reply-To: <49F9CD25.70102@icyb.net.ua> References: <20090429161626.GQ1387@albert.catwhisker.org> <20090430151830.GW1387@albert.catwhisker.org> <49F9C544.3060509@icyb.net.ua> <20090430155817.GY1387@albert.catwhisker.org> <49F9CD25.70102@icyb.net.ua>
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2009/4/30 Andriy Gapon <avg@icyb.net.ua>: > on 30/04/2009 18:58 David Wolfskill said the following: >> On Thu, Apr 30, 2009 at 06:35:32PM +0300, Andriy Gapon wrote: >>> on 30/04/2009 18:18 David Wolfskill said the following: >>>> On Wed, Apr 29, 2009 at 09:16:26AM -0700, David Wolfskill wrote: >>>>> Is there anything of use I might get from DDB? >>>> I can still poke around there for a bit, if that would be useful. >>> In general the stack trace[*] should be provided at the very least, otherwise >>> people have hard figuring out where the problem occurred, so right people may just >>> not notice a report. >> >> Sorry; it happened so quickly, I wasn't at all certain there would be >> enough to show: >> >> db> bt >> Tracing pid 0 tid 100000 td 0xc0d43610 >> cpu_topo(2,c1420d34,c081ff07,c1420d58,c0820042,...) at cpu_topo+0x43 >> smp_topo(c0804378,2,c4145a5c,fffffff,0,...) at smp_topo+0x10b >> sched_setup(0,141ec00,141ec00,141e000,1425000,...) at sched_setup+0x1a >> mi_startup() at mi_startup+0x96 >> begin() at begin+0x2c > > My guess is that (cpu_cores * cpu_logical) somehow equals to zero. That was masked earlier by additional checks on zero, and now that routine moved to the separate function (and to separate call path from subr_smp.c:mp_start() which seems not to be called). > Have you by a chance saved this crash dump? > I think that t would be interesting to look at it in kgdb. > -- wbr, pluknet
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