[patch 25/59] Fix UML on non-standard VM split hosts

Chris Wright
2007-02-03T02:37:54Z

[-- Attachment #1: fix-uml-on-non-standard-vm-split-hosts.patch --]
[-- Type: text/plain, Size: 2925 bytes --]

-stable review patch. If anyone has any objections, please let us know.
------------------

From: Jeff Dike <jdike@addtoit.com>

This fixes UML on hosts with non-standard VM splits. We had changed
the config variable that controls UML behavior on such hosts, but not
propogated the change everywhere. In particular, the values of
STUB_CODE and STUB_DATA relied on the old variable.

I also reformatted the HOST_VMSPLIT_3G help to make it more standard.

Spotted by uml@flonatel.org.

Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
--
arch/um/Kconfig.i386 | 38 +++++++++++++++++++-------------------
1 file changed, 19 insertions(+), 19 deletions(-)

--- linux-2.6.19.2.orig/arch/um/Kconfig.i386
+++ linux-2.6.19.2/arch/um/Kconfig.i386
@@ -19,22 +19,22 @@ config SEMAPHORE_SLEEPERS
choice
prompt "Host memory split"
default HOST_VMSPLIT_3G
- ---help---
- This is needed when the host kernel on which you run has a non-default
- (like 2G/2G) memory split, instead of the customary 3G/1G. If you did
- not recompile your own kernel but use the default distro's one, you can
- safely accept the "Default split" option.
-
- It can be enabled on recent (>=2.6.16-rc2) vanilla kernels via
- CONFIG_VM_SPLIT_*, or on previous kernels with special patches (-ck
- patchset by Con Kolivas, or other ones) - option names match closely the
- host CONFIG_VM_SPLIT_* ones.
-
- A lower setting (where 1G/3G is lowest and 3G/1G is higher) will
- tolerate even more "normal" host kernels, but an higher setting will be
- stricter.
+ help
+ This is needed when the host kernel on which you run has a non-default
+ (like 2G/2G) memory split, instead of the customary 3G/1G. If you did
+ not recompile your own kernel but use the default distro's one, you can
+ safely accept the "Default split" option.
+
+ It can be enabled on recent (>=2.6.16-rc2) vanilla kernels via
+ CONFIG_VM_SPLIT_*, or on previous kernels with special patches (-ck
+ patchset by Con Kolivas, or other ones) - option names match closely the
+ host CONFIG_VM_SPLIT_* ones.
+
+ A lower setting (where 1G/3G is lowest and 3G/1G is higher) will
+ tolerate even more "normal" host kernels, but an higher setting will be
+ stricter.

- So, if you do not know what to do here, say 'Default split'.
+ So, if you do not know what to do here, say 'Default split'.

config HOST_VMSPLIT_3G
bool "Default split (3G/1G user/kernel host split)"
@@ -67,13 +67,13 @@ config 3_LEVEL_PGTABLES

config STUB_CODE
hex
- default 0xbfffe000 if !HOST_2G_2G
- default 0x7fffe000 if HOST_2G_2G
+ default 0xbfffe000 if !HOST_VMSPLIT_2G
+ default 0x7fffe000 if HOST_VMSPLIT_2G

config STUB_DATA
hex
- default 0xbffff000 if !HOST_2G_2G
- default 0x7ffff000 if HOST_2G_2G
+ default 0xbffff000 if !HOST_VMSPLIT_2G
+ default 0x7ffff000 if HOST_VMSPLIT_2G

config STUB_START
hex

--