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From: Linus Torvalds <torvalds@linux-foundation.org>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Christian <haveaniceday@cv-sv.de>, linux-kernel@vger.kernel.org
Subject: Re: 2.6.22-rc1 does not boot on VIA C3_2 cause of X86_CMPXCHG64
Date: Wed, 16 May 2007 20:16:11 -0700 (PDT)	[thread overview]
Message-ID: <alpine.LFD.0.98.0705162012340.3890@woody.linux-foundation.org> (raw)
In-Reply-To: <464BC67F.7080707@zytor.com>



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?

What else uses it? Early setup in real mode? What am I missing? My grep 
powers are waning..

		Linus

  reply	other threads:[~2007-05-17  3:18 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-05-17  0:09 Christian
2007-05-17  0:42 ` Dave Jones
2007-05-17  1:15   ` H. Peter Anvin
2007-05-17  1:55     ` H. Peter Anvin
2007-05-17  1:39   ` Christian
2007-05-17 21:28     ` Christian Volkmann
2007-05-17 21:47       ` Dave Jones
2007-05-17 21:59         ` Christian Volkmann
2007-05-31  5:22         ` [RFC: 2.6 patch] i386: remove support for the Rise CPU Adrian Bunk
2007-05-31 13:31           ` Dave Jones
2007-05-31 17:37             ` Christian Volkmann
2007-05-31 17:48               ` Dave Jones
2007-05-19 10:22       ` 2.6.22-rc1 does not boot on VIA C3_2 cause of X86_CMPXCHG64 Hans de Bruin
2007-05-17  8:56   ` Alan Cox
2007-05-17 11:51   ` Andi Kleen
2007-05-17 15:02     ` Dave Jones
2007-05-17 22:14     ` H. Peter Anvin
2007-05-19  5:53   ` 2.6.22-rc1 does not boot on VIA C3_2 cause of X86_CMPXCHG64 II Andi Kleen
2007-05-19  6:02     ` Dave Jones
2007-05-19 11:47       ` Andi Kleen
2007-05-19 17:23         ` Dave Jones
2007-05-19  8:22     ` Claas Langbehn
2007-05-19 18:10       ` H. Peter Anvin
2007-05-19 11:42     ` Christian Volkmann
2007-05-19 11:54       ` Andi Kleen
2007-05-23 21:50         ` H. Peter Anvin
2007-05-19 17:26       ` Claas Langbehn
2007-05-19 20:22         ` Via C3: other flags possible ? Christian Volkmann
2007-05-19 22:36           ` Christian Volkmann
2007-05-19 22:52             ` Via C3/C7: " Simon Arlott
2007-05-20  8:19               ` Claas Langbehn
2007-05-20 13:14                 ` Christian Volkmann
2007-05-20 12:59             ` Via C3: " Andi Kleen
2007-05-19 17:54       ` 2.6.22-rc1 does not boot on VIA C3_2 cause of X86_CMPXCHG64 II Claas Langbehn
2007-05-17  1:10 ` 2.6.22-rc1 does not boot on VIA C3_2 cause of X86_CMPXCHG64 Linus Torvalds
2007-05-17  1:25   ` Christian
2007-05-17  2:21     ` Linus Torvalds
2007-05-17  3:05       ` H. Peter Anvin
2007-05-17  3:16         ` Linus Torvalds [this message]
2007-05-17  4:51           ` H. Peter Anvin
2007-05-17  6:18             ` Dave Jones
2007-05-17  6:31               ` H. Peter Anvin
2007-05-17  6:17           ` Dave Jones
2007-05-17  9:22 ` Hans de Bruin

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