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[PATCH] radix-tree: small

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Reduce radix tree node memory usage by about a factor of 4 for small files
(< 64K).  There are pointer traversal and memory usage costs for large
files with dense pagecache.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Nick Piggin 2006-06-23 02:03:22 -07:00 committed by Linus Torvalds
parent 612d6c19db
commit cfd9b7df4a
1 changed files with 1 additions and 1 deletions
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2
lib/radix-tree.c
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@ -33,7 +33,7 @@
#ifdef __KERNEL__
#define RADIX_TREE_MAP_SHIFT 6
#define RADIX_TREE_MAP_SHIFT (CONFIG_BASE_SMALL ? 4 : 6)
#else
#define RADIX_TREE_MAP_SHIFT 3 /* For more stressful testing */
#endif