From: Matt Mackall <mpm@selenic.com>
To: Andrew Morton <akpm@osdl.org>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>
Subject: [PATCH 5/8] core-small: Shrink uid hash
Date: Fri, 21 Jan 2005 18:09:48 -0600 [thread overview]
Message-ID: <6.464233479@selenic.com> (raw)
In-Reply-To: <5.464233479@selenic.com>
CONFIG_CORE_SMALL reduce UID lookup hash
Signed-off-by: Matt Mackall <mpm@selenic.com>
Index: tiny/kernel/user.c
===================================================================
--- tiny.orig/kernel/user.c 2004-12-04 15:42:41.000000000 -0800
+++ tiny/kernel/user.c 2004-12-04 19:42:32.462123939 -0800
@@ -18,7 +18,11 @@
* UID task count cache, to get fast user lookup in "alloc_uid"
* when changing user ID's (ie setuid() and friends).
*/
+#ifdef CONFIG_CORE_SMALL
+#define UIDHASH_BITS 3
+#else
#define UIDHASH_BITS 8
+#endif
#define UIDHASH_SZ (1 << UIDHASH_BITS)
#define UIDHASH_MASK (UIDHASH_SZ - 1)
#define __uidhashfn(uid) (((uid >> UIDHASH_BITS) + uid) & UIDHASH_MASK)
next prev parent reply other threads:[~2005-01-22 0:18 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-01-22 0:09 [PATCH 0/8] core-small: Introduce CONFIG_CORE_SMALL from -tiny Matt Mackall
2005-01-22 0:09 ` [PATCH 1/8] core-small: Add option to embedded menu Matt Mackall
2005-01-22 0:09 ` [PATCH 2/8] core-small: Collapse major names hash Matt Mackall
2005-01-22 0:09 ` [PATCH 3/8] core-small: Collapse chrdevs hash Matt Mackall
2005-01-22 0:09 ` [PATCH 4/8] core-small: Shrink PID lookup tables Matt Mackall
2005-01-22 0:09 ` Matt Mackall [this message]
2005-01-22 0:09 ` [PATCH 6/8] core-small: Shrink futex queue hash Matt Mackall
2005-01-22 0:09 ` [PATCH 7/8] core-small: Shrink timer lists Matt Mackall
2005-01-22 0:09 ` [PATCH 8/8] core-small: Shrink console buffer Matt Mackall
2005-01-23 8:40 ` [PATCH 0/8] core-small: Introduce CONFIG_CORE_SMALL from -tiny Andrew Morton
2005-01-23 17:52 ` Matt Mackall
2005-01-23 21:05 ` Andrew Morton
2005-01-24 2:50 ` Matt Mackall
2005-01-24 20:00 ` Alan Cox
2005-01-24 22:47 ` Tim Bird
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