diff options
| author | Andi Kleen <ak@suse.de> | 2006-08-30 19:37:12 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-08-31 01:05:15 +0200 |
| commit | ceee88223047749ad683d397b19904c3dfb6adeb (patch) | |
| tree | 0ffd471277ba53299690c444e669ea343cba145f /arch/x86_64/kernel/e820.c | |
| parent | [PATCH] x86: Make backtracer fallback logic more bullet-proof (diff) | |
| download | linux-ceee88223047749ad683d397b19904c3dfb6adeb.tar.xz linux-ceee88223047749ad683d397b19904c3dfb6adeb.zip | |
[PATCH] x86_64: Recover 1MB of kernel memory
Noticed by Jan Beulich.
When the kernel was moved from 1MB to 2MB in 2.6.17 the kernel reservation
code wasn't adjusted and it still reserved starting with 1MB. This means 1MB always
were lost.
This patch fixes this by reserving only starting with _text.
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/x86_64/kernel/e820.c')
| -rw-r--r-- | arch/x86_64/kernel/e820.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/x86_64/kernel/e820.c b/arch/x86_64/kernel/e820.c index d81e3d6dd241..764bf23c7103 100644 --- a/arch/x86_64/kernel/e820.c +++ b/arch/x86_64/kernel/e820.c @@ -71,7 +71,11 @@ static inline int bad_addr(unsigned long *addrp, unsigned long size) #endif /* kernel code + 640k memory hole (later should not be needed, but be paranoid for now) */ - if (last >= 640*1024 && addr < __pa_symbol(&_end)) { + if (last >= 640*1024 && addr < 1024*1024) { + *addrp = 1024*1024; + return 1; + } + if (last >= __pa_symbol(&_text) && last < __pa_symbol(&_end)) { *addrp = __pa_symbol(&_end); return 1; } |