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From: Adrian Bunk <bunk@fs.tum.de>
To: Mikael Pettersson <mikpe@csd.uu.se>
Cc: davej@redhat.com, alan@lxorguk.ukuu.org.uk, linux-kernel@vger.kernel.org
Subject: Re: RFC: [2.6 patch] better i386 CPU selection
Date: Sat, 13 Sep 2003 00:51:39 +0200	[thread overview]
Message-ID: <20030912225138.GU27368@fs.tum.de> (raw)
In-Reply-To: <200309122009.h8CK9KZp006128@harpo.it.uu.se>

On Fri, Sep 12, 2003 at 10:09:20PM +0200, Mikael Pettersson wrote:
>...
> > > - Which CPUs exactly need X86_ALIGNMENT_16?
> >
> >Unsure. This could use testing on a few systems.
> 
> K7s and P5s (and 486s too if I remember correctly) strongly prefer
> code entry points and loop labels to be 16-byte aligned. This is
> due to the way code is fetched from L1.
>...

Hm, that's pretty different from the definition in -test5:

config X86_ALIGNMENT_16
        bool
        depends on MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCYRIXIII || 
          MELAN || MK6 || M586MMX || M586TSC || M586 || M486 || MVIAC3_2
        default y



> /Mikael

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed


  reply	other threads:[~2003-09-12 22:51 UTC|newest]

Thread overview: 68+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-09-12 20:09 RFC: [2.6 patch] better i386 CPU selection Mikael Pettersson
2003-09-12 22:51 ` Adrian Bunk [this message]
  -- strict thread matches above, loose matches on Subject: below --
2003-09-14  8:55 John Bradford
2003-09-14  8:52 John Bradford
     [not found] <viay.6qh.11@gated-at.bofh.it>
     [not found] ` <vli4.2Ml.15@gated-at.bofh.it>
     [not found]   ` <vnjR.5Sn.5@gated-at.bofh.it>
     [not found]     ` <vnD7.6jK.1@gated-at.bofh.it>
     [not found]       ` <vnMX.6x0.17@gated-at.bofh.it>
     [not found]         ` <vqKS.2NP.29@gated-at.bofh.it>
2003-09-14  0:07           ` Andi Kleen
2003-09-14  0:10             ` David Lang
2003-09-13 12:51 Adrian Bunk
2003-09-13 14:20 ` Kevin P. Fleming
2003-09-13 17:10   ` Adrian Bunk
2003-09-13 16:11 ` Dave Jones
2003-09-13 16:41   ` Adrian Bunk
2003-09-13 17:21     ` Dave Jones
2003-09-13 18:22       ` Adrian Bunk
2003-09-13 18:35         ` Dave Jones
2003-09-13 21:52           ` Adrian Bunk
2003-09-13 18:21   ` Jeff Garzik
2003-09-13 18:37     ` Dave Jones
2003-09-13 18:53       ` Jeff Garzik
2003-09-13 20:32         ` Alan Cox
2003-09-13 22:07         ` Adrian Bunk
2003-09-13 22:33           ` Jeff Garzik
2003-09-13 18:47     ` Alan Cox
2003-09-13 11:04 Mikael Pettersson
2003-09-13 11:02 Mikael Pettersson
2003-09-13 11:13 ` Adrian Bunk
2003-09-12 21:38 Mikael Pettersson
2003-09-12 23:23 ` Adrian Bunk
2003-09-16 12:42 ` Maciej W. Rozycki
2003-09-07 21:47 Mikael Pettersson
2003-09-07 21:46 Mikael Pettersson
2003-09-07 21:56 ` Adrian Bunk
2003-09-07 16:47 Mikael Pettersson
2003-09-07 17:43 ` Jamie Lokier
2003-09-07 18:09   ` Alan Cox
2003-09-08  8:17     ` Rogier Wolff
2003-09-08 12:36       ` Alan Cox
2003-09-10 14:17       ` Pavel Machek
2003-09-11  6:28     ` Adrian Bunk
2003-09-11 11:04       ` Dave Jones
2003-09-12 20:41         ` Adrian Bunk
2003-09-11 12:10       ` Maciej W. Rozycki
2003-09-12 19:07         ` Adrian Bunk
2003-09-16 12:34           ` Maciej W. Rozycki
2003-09-11 14:25       ` Alan Cox
2003-09-13 10:37         ` Adrian Bunk
2003-09-07 17:51 ` Adrian Bunk
2003-09-07 11:28 Adrian Bunk
2003-09-07 11:46 ` Jan-Benedict Glaw
2003-09-07 13:17   ` Adrian Bunk
2003-09-07 13:48     ` Jan-Benedict Glaw
2003-09-07 12:42 ` Sam Ravnborg
2003-09-07 12:51   ` Adrian Bunk
2003-09-07 12:42 ` Robert Schwebel
2003-09-07 13:00   ` Adrian Bunk
2003-09-07 13:14     ` Robert Schwebel
2003-09-08 15:26       ` Tom Rini
2003-09-07 17:31     ` Alan Cox
2003-09-07 17:48       ` Robert Schwebel
2003-09-07 18:04         ` Alan Cox
2003-09-07 18:26           ` Robert Schwebel
2003-09-07 19:17             ` Alan Cox
2003-09-07 19:17             ` Alan Cox
2003-09-07 17:25 ` Alan Cox
2003-09-11  6:19   ` Adrian Bunk
2003-09-08  0:46 ` Rusty Russell
2003-09-08 14:29   ` Adrian Bunk
2003-09-09  1:11     ` Rusty Russell
2003-09-11  6:22       ` Adrian Bunk

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