From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Thu, 3 Nov 2005 15:13:17 -0500
From: Jeff Dike <jdike@addtoit.com>
Subject: Re: [Lhms-devel] [PATCH 0/7] Fragmentation Avoidance V19
Message-ID: <20051103201317.GA8341@ccure.user-mode-linux.org>
References: <E1EXEfW-0005ON-00@w-gerrit.beaverton.ibm.com> <200511030007.34285.rob@landley.net> <4369BD7D.6050507@yahoo.com.au> <200511031154.11219.rob@landley.net>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <200511031154.11219.rob@landley.net>
Sender: owner-linux-mm@kvack.org
Return-Path: <owner-linux-mm@kvack.org>
To: Rob Landley <rob@landley.net>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>, Gerrit Huizenga <gh@us.ibm.com>, Ingo Molnar <mingo@elte.hu>, Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>, Dave Hansen <haveblue@us.ibm.com>, Mel Gorman <mel@csn.ul.ie>, "Martin J. Bligh" <mbligh@mbligh.org>, Andrew Morton <akpm@osdl.org>, kravetz@us.ibm.com, linux-mm <linux-mm@kvack.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, lhms <lhms-devel@lists.sourceforge.net>
List-ID: <linux-mm.kvack.org>

On Thu, Nov 03, 2005 at 11:54:10AM -0600, Rob Landley wrote:
> Lots of work has gone into batching up syscalls and making as few of them as 
> possible because they are a performance bottleneck.  You want to introduce a 
> syscall for every single individual page of memory allocated or freed.
> 
> That's stupid.

I think what I'm optimizing is TLB flushes, not system calls.  With
mmap et al, they are effectively the same thing though.

				Jeff

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>