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authorDave Hansen <haveblue@us.ibm.com>2006-09-26 02:32:29 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-09-26 11:48:56 -0400
commit753b9f86e7aef76c2beda32668ce528f90cb1733 (patch)
tree49b90d6553ae06058ece02fd3d005d5821c347ba
parent5091e746848f74c9a2c0579b4ef8d8cd1a6b135d (diff)
[PATCH] x86: enable VMSPLIT for highmem kernels
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 <haveblue@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--arch/i386/Kconfig3
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/i386/Kconfig b/arch/i386/Kconfig
index 1f83efb7a60e..6189b0c28d6f 100644
--- a/arch/i386/Kconfig
+++ b/arch/i386/Kconfig
@@ -494,7 +494,7 @@ config HIGHMEM64G
494endchoice 494endchoice
495 495
496choice 496choice
497 depends on EXPERIMENTAL && !X86_PAE 497 depends on EXPERIMENTAL
498 prompt "Memory split" if EMBEDDED 498 prompt "Memory split" if EMBEDDED
499 default VMSPLIT_3G 499 default VMSPLIT_3G
500 help 500 help
@@ -516,6 +516,7 @@ choice
516 config VMSPLIT_3G 516 config VMSPLIT_3G
517 bool "3G/1G user/kernel split" 517 bool "3G/1G user/kernel split"
518 config VMSPLIT_3G_OPT 518 config VMSPLIT_3G_OPT
519 depends on !HIGHMEM
519 bool "3G/1G user/kernel split (for full 1G low memory)" 520 bool "3G/1G user/kernel split (for full 1G low memory)"
520 config VMSPLIT_2G 521 config VMSPLIT_2G
521 bool "2G/2G user/kernel split" 522 bool "2G/2G user/kernel split"