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Message-ID: <4514539D.8010704@cora.nwra.com> Date: Fri, 22 Sep 2006 15:20:29 -0600 From: Orion Poplawski <orion@...a.nwra.com> To: Linus Torvalds <torvalds@...l.org> CC: linux-kernel@...r.kernel.org Subject: Re: How to debug random bus errors? Linus Torvalds wrote: > > On Fri, 22 Sep 2006, Orion Poplawski wrote: >> We're seeing programs die with "bus error" (SIGBUS) randomly on a dual >> processor Opteron machine. I've run memtest86+ and cpuburn stress tests with >> no failure. gdb on a core file seems uninteresting. Is there some way to >> trace the kernel to try to get more insight? > > Which kernel? > Sorry, 2.6.17-1.2142_FC4smp, so fairly recent. > Other than that, does it tend to happen to the same particular program? It > might just be a user space bug that needs a specific set of things to > happen. Some of those bugs go away when you disable address space > randomization etc, since they can depend on just pure luck (or rather, > lack there-of). So far just one program. Forgot about address space randomization, may need to look into turning that off to help debugging. Thanks! -- Orion Poplawski System Administrator 303-415-9701 x222 NWRA/CoRA Division FAX: 303-415-9702 3380 Mitchell Lane orion@...a.nwra.com Boulder, CO 80301 http://www.cora.nwra.com - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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