Date: Tue, 28 Jul 2009 11:35:45 +0100 From: Anton Shterenlikht <mexas@bristol.ac.uk> To: Anton Shterenlikht <mexas@bristol.ac.uk> Cc: "O. Hartmann" <ohartman@mail.zedat.fu-berlin.de>, freebsd-current@freebsd.org, freebsd-ia64@freebsd.org Subject: Re: FreeBSD 8.0-BETA2/amd64 crashes on SMP under load Message-ID: <20090728103545.GA22380@mech-cluster241.men.bris.ac.uk> In-Reply-To: <20090727210428.GA30253@mech-cluster241.men.bris.ac.uk> References: <4A6DB30B.20705@zedat.fu-berlin.de> <4A6DB9F1.7050404@haruhiism.net> <4A6E0620.6070200@mail.zedat.fu-berlin.de> <20090727210428.GA30253@mech-cluster241.men.bris.ac.uk>
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On Mon, Jul 27, 2009 at 10:04:28PM +0100, Anton Shterenlikht wrote: > On Mon, Jul 27, 2009 at 09:55:12PM +0200, O. Hartmann wrote: > > Kamigishi Rei wrote: > > > O. Hartmann wrote: > > >> I have the problem of crashing FreeBSD 8.0-BETA2/amd64 under load on > > >> all of our SMP boxes. Is there an issue known at the moment? If not, I > > >> will prepare the kernel for whitnessing and provide more informations, > > >> if you wish. > > > A quick question: what is in the crash message, i.e. the backtrace? > > > And what kind of crash is it - a panic() or a fatal trap? > > > > On the 8-core server box, I sometimes see : > > > > Fatal trap 12: page fault while in kernel mode > > fault code = supervisor read, page not present > > Not sure if it's related, but on ia64 SMP (2 cpus) with 8.0-current and > later with 8.0-beta1 (I havent' built beta2 yet) I'm getting crashes > under load every so often. E.g buildworld -j8 is likely to crash the > box. No messages, just a sudden freeze, no backtrace or panic, and then reboot. > > If load is less heavy, e.g. fewer processes and some idle time, the > problem doesn't seem to appear. > > I'm happy to do any further testing, if suggested. my ia64 8.0-beta1 SMP box died again on make -j8 buildworld with no panic or log entries. Is it possible that some kernel variable needs to be increased? E.g. kern.maxproc, kern.maxfiles, etc. Or perhaps I'm talking complete rubbish.. -- Anton Shterenlikht Room 2.6, Queen's Building Mech Eng Dept Bristol University University Walk, Bristol BS8 1TR, UK Tel: +44 (0)117 928 8233 Fax: +44 (0)117 929 4423
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