From owner-freebsd-hackers@FreeBSD.ORG  Mon Oct 17 11:49:02 2005
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
X-Original-To: freebsd-hackers@freebsd.org
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id A662316A41F
	for <freebsd-hackers@freebsd.org>; Mon, 17 Oct 2005 11:49:02 +0000 (GMT)
	(envelope-from kamal_ckk@yahoo.com)
Received: from web35711.mail.mud.yahoo.com (web35711.mail.mud.yahoo.com
	[66.163.179.165])
	by mx1.FreeBSD.org (Postfix) with SMTP id 06DBC43D53
	for <freebsd-hackers@freebsd.org>; Mon, 17 Oct 2005 11:49:01 +0000 (GMT)
	(envelope-from kamal_ckk@yahoo.com)
Received: (qmail 32414 invoked by uid 60001); 17 Oct 2005 11:49:01 -0000
DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com;
	h=Message-ID:Received:Date:From:Subject:To:Cc:MIME-Version:Content-Type:Content-Transfer-Encoding;
	b=Y0gdjAS2gVbg8HyqdXaNY9kKH4nxrIHPsQCG47r8QWj6iH08bm8O5t7f7hOACBQyYZ/C/3qCsF8Iot0zH+9VsLZj9DRG4mG5Fxe4yJYAKV7+aCYAXhuqFxUksaQGk28Q2o2VsuNULpiadwJgTZduQx5KO1XZ60sNqKR0V18//dY=
	; 
Message-ID: <20051017114901.32412.qmail@web35711.mail.mud.yahoo.com>
Received: from [202.79.62.15] by web35711.mail.mud.yahoo.com via HTTP;
	Mon, 17 Oct 2005 04:49:01 PDT
Date: Mon, 17 Oct 2005 04:49:01 -0700 (PDT)
From: kamal kc <kamal_ckk@yahoo.com>
To: freebsd-net@freebsd.org
MIME-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1
Content-Transfer-Encoding: 8bit
Cc: freebsd-hackers@freebsd.org
Subject: malloc() in kernel and increasing mbuf and cluster size
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, 
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 17 Oct 2005 11:49:02 -0000

this may be a trivial question for many of you
but i am confused in doing memory allocation in the 
kernel.

sys/malloc.h has function prototypes for malloc()
kern/kern_malloc.c defines the malloc()

the malloc() definition is

void *
malloc(size, type, flags)
	unsigned long size;
	struct malloc_type *type;
	int flags;

i understand the size and flags but what shall i 
do with the malloc_type.

suppose i want to allocate 1024 bytes then how 
should i call the malloc ?

i set -->
    size=1024
    flags=M_WAITOK
     type=???? (i don't know what/how to initialize
              the type) 


Next thing is that i want to make the kernel process 
network packets very fast. 
i think of increasing the mbuf and cluster size.

i want to if there will be any effect on increasing 
the mbuf and cluster size.

what would be an appropriate size of mbuf and cluster
if I use 
 i. 512 MB RAM
 iI. 1024 MB RAM
 
which parts of the kernel will be affected by 
changing the mbuf and cluster size ?

i think somebody maybe able to help me.

thanks folks.
kamal 











		
__________________________________ 
Yahoo! Music Unlimited 
Access over 1 million songs. Try it free.
http://music.yahoo.com/unlimited/