From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752686AbYKPIXj (ORCPT ); Sun, 16 Nov 2008 03:23:39 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751366AbYKPIXc (ORCPT ); Sun, 16 Nov 2008 03:23:32 -0500 Received: from 74-93-104-97-Washington.hfc.comcastbusiness.net ([74.93.104.97]:36934 "EHLO sunset.davemloft.net" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1751274AbYKPIXb (ORCPT ); Sun, 16 Nov 2008 03:23:31 -0500 Date: Sun, 16 Nov 2008 00:23:31 -0800 (PST) Message-Id: <20081116.002331.203400963.davem@davemloft.net> To: arjan@infradead.org Cc: laijs@cn.fujitsu.com, akpm@linux-foundation.org, menage@google.com, kamezawa.hiroyu@jp.fujitsu.com, balbir@linux.vnet.ibm.com, jens.axboe@oracle.com, jack@suse.cz, jes@sgi.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH 1/7] mm: introduce simple_malloc()/simple_free() From: David Miller In-Reply-To: <20081115215309.7f29c33c@infradead.org> References: <20081115210334.3870cdf6.akpm@linux-foundation.org> <491FB107.6050703@cn.fujitsu.com> <20081115215309.7f29c33c@infradead.org> X-Mailer: Mew version 6.1 on Emacs 22.1 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Arjan van de Ven Date: Sat, 15 Nov 2008 21:53:09 -0800 > On Sun, 16 Nov 2008 13:35:03 +0800 > Lai Jiangshan wrote: > > > vmalloc() is not good for performance and increasing fragment. > > but vmalloc() is need for some subsystems' alternative malloc, > > like cgroup's tasks file and other subsystems(about 20 subsystems). > > actually what you are pointing out is that these areas need improvement > to not need such huge blocks of memory... but only a series of smaller > blocks instead. Like the IPSEC policy and state hash tables when hundreds of thousands of rules become active? You have to be joking.