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Message-ID: <20070517061708.GL30166@redhat.com> Date: Thu, 17 May 2007 02:17:08 -0400 From: Dave Jones <davej@...hat.com> To: Linus Torvalds <torvalds@...ux-foundation.org> Cc: "H. Peter Anvin" <hpa@...or.com>, Christian <haveaniceday@...sv.de>, linux-kernel@...r.kernel.org Subject: Re: 2.6.22-rc1 does not boot on VIA C3_2 cause of X86_CMPXCHG64 On Wed, May 16, 2007 at 08:16:11PM -0700, Linus Torvalds wrote: > > > On Wed, 16 May 2007, H. Peter Anvin wrote: > > > > It gets turned on by the code in arch/i386/kernel/cpu. It's just that > > the new code that Andi added runs during setup, i.e. in real mode, so > > *way* earlier than that. > > Ahh. Do we really need it that early? > > Now, it's easy enough to just turn off CONFIG_X86_CMPXCHG64 (it really > should be "8B" instead of "64", but that's another issue) for those > things, and nobody should really care, but still, maybe we could re-do the > early bits to be more polite to those VIA CPU's? > > I thought the cmpxchg8b stuff was just used to page table setup. Do those > things even _support_ PAE? newer models do, yes. Even NX. In fact, primarily for NX. I've not heard of anyone running >4GB with a Nehemiah. Dave -- http://www.codemonkey.org.uk - 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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