From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161492AbWHDViu (ORCPT ); Fri, 4 Aug 2006 17:38:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1161494AbWHDViu (ORCPT ); Fri, 4 Aug 2006 17:38:50 -0400 Received: from e36.co.us.ibm.com ([32.97.110.154]:1197 "EHLO e36.co.us.ibm.com") by vger.kernel.org with ESMTP id S1161492AbWHDVit (ORCPT ); Fri, 4 Aug 2006 17:38:49 -0400 Subject: [PATCH] enable VMSPLIT for highmem kernels To: akpm@osdl.org Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Dave Hansen From: Dave Hansen Date: Fri, 04 Aug 2006 14:38:45 -0700 Message-Id: <20060804213845.986D69FA@localhost.localdomain> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org 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" _