Commit fe33f6f1 authored by Jeff Dike's avatar Jeff Dike Committed by Linus Torvalds
Browse files

[PATCH] Fix UML on non-standard VM split hosts



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: default avatarJeff Dike <jdike@addtoit.com>
Cc: Blaisorblade <blaisorblade@yahoo.it>
Cc: Pravin <shindepravin@gmail.com>
Cc: <uml@flonatel.org>
Cc: <stable@kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 569d3287
......@@ -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.
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.
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.
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
......
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