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[PATCH] x86_64: Add boot option to disable randomized mappings and cleanup

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AMD SimNow!'s JIT doesn't like them at all in the guest. For distribution
installation it's easiest if it's a boot time option.

Also I moved the variable to a more appropiate place and make
it independent from sysctl

And marked __read_mostly which it is.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Andi Kleen
2006-02-16 23:41:58 +01:00
committed by Linus Torvalds
parent 99019e9199
commit a62eaf151d
6 changed files with 16 additions and 8 deletions
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10
mm/memory.c
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@ -82,6 +82,16 @@ EXPORT_SYMBOL(num_physpages);
EXPORT_SYMBOL(high_memory);
EXPORT_SYMBOL(vmalloc_earlyreserve);
int randomize_va_space __read_mostly = 1;
static int __init disable_randmaps(char *s)
{
randomize_va_space = 0;
return 0;
}
__setup("norandmaps", disable_randmaps);
/*
* If a p?d_bad entry is found while walking page tables, report
* the error, before resetting entry to p?d_none. Usually (but