[PATCH] radix-tree: small · cfd9b7df4a - Gogs

[PATCH] radix-tree: small

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>

Nick Piggin 19 years ago

parent

612d6c19db

commit

cfd9b7df4a

1 changed files with 1 additions and 1 deletions

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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