Date: Tue, 25 Sep 2007 19:51:38 +0200 From: Kris Kennaway <kris@FreeBSD.org> To: Benjie Chen <benjie@addgene.org> Cc: freebsd-hackers@freebsd.org Subject: Re: Kernel panic on PowerEdge 1950 under certain stress load Message-ID: <46F94AAA.5030504@FreeBSD.org> In-Reply-To: <c53be070709250758v4c8da54ft7a1d6bbc1400368f@mail.gmail.com> References: <c53be070709211526j2178ebb7ia6ea39e1a5df303c@mail.gmail.com> <fd84qf$ejl$1@sea.gmane.org> <c53be070709240842h6875d45ct761d0fa5790f70e2@mail.gmail.com> <46F8D12E.7060202@FreeBSD.org> <c53be070709250758v4c8da54ft7a1d6bbc1400368f@mail.gmail.com>
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Benjie Chen wrote: > You are right, they may not be the same. From first look it seems like > they are similar based on the description of the problems -- system > stable, then under load related to network, get panic after different > time intervals. I just assumed that kernel is typically stable enough > that this kind of panic are rare (been using FBSD for 7 or 8 years now > and in heavy loads as well, never had kernel panics to deal with). OK, that means it is likely it has absolutely nothing in common. > I did reboot the system and set mpsafenet to 0 and I have not had a > crash since then (almost a day) running the same load, so that's > positive: at least it may be that that's the workaround, and I don't > need Dell to send me new memory modules to try... That should only be considered a temporary workaround while you continue to obtain debugging information to solve the problem for good. e.g. support for mpsafenet=0 has already been removed from 7.0. > Kris or Ivan: I was wondering if you could briefly explain what your > guess the problem might be. I am curious what the cause of the problem > is. E.g. it seems like a race condition, but I am curious to know more > of the details... It is impossible to say until you obtain some actual details about the panic :) Kris
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