linux-kernel - [PATCH] kprobe: increase kprobe_hash

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Date:	Fri, 07 Nov 2008 18:44:30 -0500
From:	Masami Hiramatsu <mhiramat@...hat.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Jim Keniston <jkenisto@...ibm.com>,
	David Miller <davem@...emloft.net>,
	LKML <linux-kernel@...r.kernel.org>, maneesh@...ibm.com,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
Subject: [PATCH] kprobe: increase kprobe_hash_table size

Increase the size of kprobe hash table to 512. It's useful when hundreds
of kprobes were used in the kernel because current size is just 64.

Signed-off-by: Masami Hiramatsu <mhiramat@...hat.com>
Acked-by: Ananth N Mavinakayanahalli <ananth@...ibm.com>
---
 kernel/kprobes.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: 2.6.28-rc3/kernel/kprobes.c
===================================================================
--- 2.6.28-rc3.orig/kernel/kprobes.c
+++ 2.6.28-rc3/kernel/kprobes.c
@@ -49,7 +49,7 @@
 #include <asm/errno.h>
 #include <asm/uaccess.h>

-#define KPROBE_HASH_BITS 6
+#define KPROBE_HASH_BITS 9
 #define KPROBE_TABLE_SIZE (1 << KPROBE_HASH_BITS)


-- 
Masami Hiramatsu

Software Engineer
Hitachi Computer Products (America) Inc.
Software Solutions Division

e-mail: mhiramat@...hat.com

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