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Message-ID: <20070906053654.GD31880@one.firstfloor.org> Date: Thu, 6 Sep 2007 07:36:54 +0200 From: Andi Kleen <andi@...stfloor.org> To: Stefan Becker <Stefan.Becker@...ia.com> Cc: ext Andi Kleen <andi@...stfloor.org>, ext Michal Piotrowski <michal.k.k.piotrowski@...il.com>, linux-kernel@...r.kernel.org, davej@...emonkey.org.uk Subject: Re: [pre-2.6.23 REGRESSION] 2.6.23-rc3-git1 crash/stuck on VIA CN700 system > This kernel boots up OK. Looking at the preprocessed C code the I assume you tested it a few times to make sure it really was the problem? Perhaps reenable it also once again and see if it hangs again just to be sure. > So what can we do about the clflush on this CPU? I'll just remove that CLFLUSH statement. It was just supposed to be an optimization, but is not strictly needed. The only thing that worries me is that CLFLUSH might be broken in more ways on those VIA CPUs and we also use it in other places. Of course it would be possible to remove it from the kernel capabilities but we can't really stop user space using it. We don't know how many VIA CPU models are affected by this problem. Dave, didn't you have Centaur contacts that could be asked? It seems like CLFLUSH causes kernel hangs -Andi - 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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