diff options
author | John Hawkes <hawkes@sgi.com> | 2006-03-25 06:08:02 -0500 |
---|---|---|
committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-25 11:22:58 -0500 |
commit | 6e692ed37a507e18d8afe8e5faebd8c4722c5f12 (patch) | |
tree | 9178f07eb643123d20a95e4ec08477f2c85bd9ea /mm/page_alloc.c | |
parent | 962749af67b145c57917bfbff3c303ebd7d5988c (diff) |
[PATCH] fix alloc_large_system_hash() roundup
The "rounded up to nearest power of 2 in size" algorithm in
alloc_large_system_hash is not correct. As coded, it takes an otherwise
acceptable power-of-2 value and doubles it. For example, we see the error
if we boot with thash_entries=2097152 which produces a hash table with
4194304 entries.
Signed-off-by: John Hawkes <hawkes@sgi.com>
Cc: Roland Dreier <rdreier@cisco.com>
Cc: "Chen, Kenneth W" <kenneth.w.chen@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm/page_alloc.c')
-rw-r--r-- | mm/page_alloc.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 637f57ff5b5a..338a02bb004d 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c | |||
@@ -2702,8 +2702,7 @@ void *__init alloc_large_system_hash(const char *tablename, | |||
2702 | else | 2702 | else |
2703 | numentries <<= (PAGE_SHIFT - scale); | 2703 | numentries <<= (PAGE_SHIFT - scale); |
2704 | } | 2704 | } |
2705 | /* rounded up to nearest power of 2 in size */ | 2705 | numentries = roundup_pow_of_two(numentries); |
2706 | numentries = 1UL << (long_log2(numentries) + 1); | ||
2707 | 2706 | ||
2708 | /* limit allocation size to 1/16 total memory by default */ | 2707 | /* limit allocation size to 1/16 total memory by default */ |
2709 | if (max == 0) { | 2708 | if (max == 0) { |