[PATCH 5/8] base-small: shrink UID hash

From: Matt Mackall
Date: Mon Jan 31 2005 - 02:36:07 EST


CONFIG_BASE_SMALL reduce UID lookup hash

Signed-off-by: Matt Mackall <mpm@xxxxxxxxxxx>

Index: tq/kernel/user.c
===================================================================
--- tq.orig/kernel/user.c 2005-01-25 09:31:58.000000000 -0800
+++ tq/kernel/user.c 2005-01-26 13:11:10.000000000 -0800
@@ -18,7 +18,8 @@
* UID task count cache, to get fast user lookup in "alloc_uid"
* when changing user ID's (ie setuid() and friends).
*/
-#define UIDHASH_BITS 8
+
+#define UIDHASH_BITS (CONFIG_BASE_SMALL ? 3 : 8)
#define UIDHASH_SZ (1 << UIDHASH_BITS)
#define UIDHASH_MASK (UIDHASH_SZ - 1)
#define __uidhashfn(uid) (((uid >> UIDHASH_BITS) + uid) & UIDHASH_MASK)
-
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