From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from d03relay04.boulder.ibm.com (d03relay04.boulder.ibm.com [9.17.195.106]) by e33.co.us.ibm.com (8.12.11.20060308/8.12.11) with ESMTP id k74LcnSZ028439 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=FAIL) for ; Fri, 4 Aug 2006 17:38:49 -0400 Received: from d03av04.boulder.ibm.com (d03av04.boulder.ibm.com [9.17.195.170]) by d03relay04.boulder.ibm.com (8.13.6/NCO/VER7.0) with ESMTP id k74LcldJ201950 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Fri, 4 Aug 2006 15:38:49 -0600 Received: from d03av04.boulder.ibm.com (loopback [127.0.0.1]) by d03av04.boulder.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id k74Lclpt016585 for ; Fri, 4 Aug 2006 15:38:47 -0600 Subject: [PATCH] enable VMSPLIT for highmem kernels From: Dave Hansen Date: Fri, 04 Aug 2006 14:38:45 -0700 Message-Id: <20060804213845.986D69FA@localhost.localdomain> Sender: owner-linux-mm@kvack.org Return-Path: To: akpm@osdl.org Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Dave Hansen List-ID: I'll assume that the complete lack of commenting on this patch mean that everyone agrees with me. :) Time for -mm I guess. -- The current VMSPLIT Kconfig option is disabled whenever highmem is on. This is a bit screwy because the people who need to change VMSPLIT the most tend to be the ones *with* highmem and constrained lowmem. So, remove the highmem dependency. But, re-include the dependency for the "full 1GB of lowmem" option. You can't have the full 1GB of lowmem and highmem because of the need for the vmalloc(), kmap(), etc... areas. I thought there would be at least a bit of tweaking to do to get it to work, but everything seems OK. Boot tested on a 4GB x86 machine, and a 12GB 3-node NUMA-Q: elm3b82:~# cat /proc/meminfo MemTotal: 3695412 kB MemFree: 3659540 kB ... LowTotal: 2909008 kB LowFree: 2892324 kB ... elm3b82:~# zgrep PAE /proc/config.gz CONFIG_X86_PAE=y larry:~# cat /proc/meminfo MemTotal: 11845900 kB MemFree: 11786748 kB ... LowTotal: 2855180 kB LowFree: 2830092 kB Signed-off-by: Dave Hansen --- lxc-dave/arch/i386/Kconfig | 3 ++- 1 files changed, 2 insertions(+), 1 deletion(-) diff -puN arch/i386/Kconfig~split-for-pae arch/i386/Kconfig --- lxc/arch/i386/Kconfig~split-for-pae 2006-08-03 09:01:32.000000000 -0700 +++ lxc-dave/arch/i386/Kconfig 2006-08-04 14:38:34.000000000 -0700 @@ -497,7 +497,7 @@ config HIGHMEM64G endchoice choice - depends on EXPERIMENTAL && !X86_PAE + depends on EXPERIMENTAL prompt "Memory split" if EMBEDDED default VMSPLIT_3G help @@ -519,6 +519,7 @@ choice config VMSPLIT_3G bool "3G/1G user/kernel split" config VMSPLIT_3G_OPT + depends on !HIGHMEM bool "3G/1G user/kernel split (for full 1G low memory)" config VMSPLIT_2G bool "2G/2G user/kernel split" _ -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org