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| author | Andi Kleen <ak@suse.de> | 2005-05-17 04:53:20 +0000 |
|---|---|---|
| committer | <chrisw@vas.sous-sol.org> | 2005-05-26 21:20:11 -0700 |
| commit | b80f032f5c5713fdfccfd0005b0e3078f32596b2 (patch) | |
| tree | 5196844f0e40605cba37b9111a8036b5bb7a4c68 | |
| parent | f51f3c46d7deaf3b957fefdce0c7e55d930f1c9f (diff) | |
| download | linux-stable-b80f032f5c5713fdfccfd0005b0e3078f32596b2.tar.gz linux-stable-b80f032f5c5713fdfccfd0005b0e3078f32596b2.tar.bz2 linux-stable-b80f032f5c5713fdfccfd0005b0e3078f32596b2.zip | |
[PATCH] x86_64: Add a guard page at the end of the 47bit address space
This works around a bug in the AMD K8 CPUs.
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Chris Wright <chrisw@osdl.org>
| -rw-r--r-- | include/asm-x86_64/processor.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/asm-x86_64/processor.h b/include/asm-x86_64/processor.h index 6dadc6400319..31e8d82ce007 100644 --- a/include/asm-x86_64/processor.h +++ b/include/asm-x86_64/processor.h @@ -160,9 +160,9 @@ static inline void clear_in_cr4 (unsigned long mask) /* - * User space process size. 47bits. + * User space process size. 47bits minus one guard page. */ -#define TASK_SIZE (0x800000000000UL) +#define TASK_SIZE (0x800000000000UL - 4096) /* This decides where the kernel will search for a free chunk of vm * space during mmap's. |