From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1422967AbWBAWXQ (ORCPT ); Wed, 1 Feb 2006 17:23:16 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1422979AbWBAWXQ (ORCPT ); Wed, 1 Feb 2006 17:23:16 -0500 Received: from MAIL.13thfloor.at ([212.16.62.50]:13805 "EHLO mail.13thfloor.at") by vger.kernel.org with ESMTP id S1422967AbWBAWXP (ORCPT ); Wed, 1 Feb 2006 17:23:15 -0500 Date: Wed, 1 Feb 2006 23:23:14 +0100 From: Herbert Poetzl To: Mark Lord Cc: Jens Axboe , Linus Torvalds , Byron Stanoszek , Ingo Molnar , linux-kernel@vger.kernel.org, Andrew Morton Subject: Re: [PATCH ] VMSPLIT config options (with default config fixed) Message-ID: <20060201222314.GA26081@MAIL.13thfloor.at> Mail-Followup-To: Mark Lord , Jens Axboe , Linus Torvalds , Byron Stanoszek , Ingo Molnar , linux-kernel@vger.kernel.org, Andrew Morton References: <20060110132957.GA28666@elte.hu> <20060110133728.GB3389@suse.de> <20060110143931.GM3389@suse.de> <43C3E9C2.1000309@rtr.ca> <20060110173217.GU3389@suse.de> <43C3F0CA.10205@rtr.ca> <43C403BA.1050106@pobox.com> <43C40803.2000106@rtr.ca> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <43C40803.2000106@rtr.ca> User-Agent: Mutt/1.5.6i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jan 10, 2006 at 02:16:19PM -0500, Mark Lord wrote: > Okay, fixed the ordering of the "default" lines > so that the Kconfig actually works correctly. > > Best for Andrew to soak this one in -mm. glad to see that the linux kernel is now ready for the 'idea' I submitted a patch[1] for, more than a year ago -- which unfortunately went unnoticed back then ... cheers to Jens and Mark! best, Herbert [1] http://lkml.org/lkml/2004/10/9/126 > Signed-off-by: Mark Lord > > diff -u --recursive --new-file --exclude='.*' > linux-2.6.15/arch/i386/Kconfig linux/arch/i386/Kconfig > --- linux-2.6.15/arch/i386/Kconfig 2006-01-02 22:21:10.000000000 -0500 > +++ linux/arch/i386/Kconfig 2006-01-10 12:02:40.000000000 -0500 > @@ -448,6 +448,43 @@ > > endchoice > > +choice > + depends on EXPERIMENTAL && !X86_PAE > + prompt "Memory split" > + default VMSPLIT_3G > + help > + Select the desired split between kernel and user memory. > + > + If the address range available to the kernel is less than the > + physical memory installed, the remaining memory will be available > + as "high memory". Accessing high memory is a little more costly > + than low memory, as it needs to be mapped into the kernel first. > + Note that increasing the kernel address space limits the range > + available to user programs, making the address space there > + tighter. Selecting anything other than the default 3G/1G split > + will also likely make your kernel incompatible with binary-only > + kernel modules. > + > + If you are not absolutely sure what you are doing, leave this > + option alone! > + > + config VMSPLIT_3G > + bool "3G/1G user/kernel split" > + config VMSPLIT_3G_OPT > + bool "3G/1G user/kernel split (for full 1G low memory)" > + config VMSPLIT_2G > + bool "2G/2G user/kernel split" > + config VMSPLIT_1G > + bool "1G/3G user/kernel split" > +endchoice > + > +config PAGE_OFFSET > + hex > + default 0xB0000000 if VMSPLIT_3G_OPT > + default 0x78000000 if VMSPLIT_2G > + default 0x40000000 if VMSPLIT_1G > + default 0xC0000000 > + > config HIGHMEM > bool > depends on HIGHMEM64G || HIGHMEM4G > diff -u --recursive --new-file --exclude='.*' > linux-2.6.15/include/asm-i386/page.h linux/include/asm-i386/page.h > --- linux-2.6.15/include/asm-i386/page.h 2006-01-02 > 22:21:10.000000000 -0500 > +++ linux/include/asm-i386/page.h 2006-01-10 12:04:56.000000000 -0500 > @@ -110,10 +110,10 @@ > #endif /* __ASSEMBLY__ */ > > #ifdef __ASSEMBLY__ > -#define __PAGE_OFFSET (0xC0000000) > +#define __PAGE_OFFSET CONFIG_PAGE_OFFSET > #define __PHYSICAL_START CONFIG_PHYSICAL_START > #else > -#define __PAGE_OFFSET (0xC0000000UL) > +#define __PAGE_OFFSET ((unsigned long)CONFIG_PAGE_OFFSET) > #define __PHYSICAL_START ((unsigned long)CONFIG_PHYSICAL_START) > #endif > #define __KERNEL_START (__PAGE_OFFSET + __PHYSICAL_START) > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/