From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933514AbXGZJem (ORCPT ); Thu, 26 Jul 2007 05:34:42 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1759262AbXGZJed (ORCPT ); Thu, 26 Jul 2007 05:34:33 -0400 Received: from smtp2.linux-foundation.org ([207.189.120.14]:56815 "EHLO smtp2.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759258AbXGZJec (ORCPT ); Thu, 26 Jul 2007 05:34:32 -0400 Date: Thu, 26 Jul 2007 02:34:01 -0700 From: Andrew Morton To: Ingo Molnar Cc: Frank Kingswood , Andi Kleen , Nick Piggin , Ray Lee , Jesper Juhl , ck list , Paul Jackson , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: -mm merge plans for 2.6.23 Message-Id: <20070726023401.f6a2fbdf.akpm@linux-foundation.org> In-Reply-To: <20070726092025.GA9157@elte.hu> References: <20070710013152.ef2cd200.akpm@linux-foundation.org> <200707102015.44004.kernel@kolivas.org> <9a8748490707231608h453eefffx68b9c391897aba70@mail.gmail.com> <46A57068.3070701@yahoo.com.au> <2c0942db0707232153j3670ef31kae3907dff1a24cb7@mail.gmail.com> <46A58B49.3050508@yahoo.com.au> <2c0942db0707240915h56e007e3l9110e24a065f2e73@mail.gmail.com> <46A6CC56.6040307@yahoo.com.au> <46A85D95.509@kingswood-consulting.co.uk> <20070726092025.GA9157@elte.hu> X-Mailer: Sylpheed 2.4.1 (GTK+ 2.8.17; x86_64-unknown-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 26 Jul 2007 11:20:25 +0200 Ingo Molnar wrote: > Once we give the kernel the knowledge that the dentry wont be used again > by this app, the kernel can do a lot more intelligent decision and not > baloon the dentry cache. > > ( we _do_ want to baloon the dentry cache otherwise - for things like > "find" - having a fast VFS is important. But known-use-once things > like the daily updatedb job can clearly be annotated properly. ) Mutter. /proc/sys/vm/vfs_cache_pressure has been there for what, three years? Are any distros raising it during the updatedb run yet? From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Thu, 26 Jul 2007 02:34:01 -0700 From: Andrew Morton Subject: Re: -mm merge plans for 2.6.23 Message-Id: <20070726023401.f6a2fbdf.akpm@linux-foundation.org> In-Reply-To: <20070726092025.GA9157@elte.hu> References: <20070710013152.ef2cd200.akpm@linux-foundation.org> <200707102015.44004.kernel@kolivas.org> <9a8748490707231608h453eefffx68b9c391897aba70@mail.gmail.com> <46A57068.3070701@yahoo.com.au> <2c0942db0707232153j3670ef31kae3907dff1a24cb7@mail.gmail.com> <46A58B49.3050508@yahoo.com.au> <2c0942db0707240915h56e007e3l9110e24a065f2e73@mail.gmail.com> <46A6CC56.6040307@yahoo.com.au> <46A85D95.509@kingswood-consulting.co.uk> <20070726092025.GA9157@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Ingo Molnar Cc: Frank Kingswood , Andi Kleen , Nick Piggin , Ray Lee , Jesper Juhl , ck list , Paul Jackson , linux-mm@kvack.org, linux-kernel@vger.kernel.org List-ID: On Thu, 26 Jul 2007 11:20:25 +0200 Ingo Molnar wrote: > Once we give the kernel the knowledge that the dentry wont be used again > by this app, the kernel can do a lot more intelligent decision and not > baloon the dentry cache. > > ( we _do_ want to baloon the dentry cache otherwise - for things like > "find" - having a fast VFS is important. But known-use-once things > like the daily updatedb job can clearly be annotated properly. ) Mutter. /proc/sys/vm/vfs_cache_pressure has been there for what, three years? Are any distros raising it during the updatedb run yet? -- 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: email@kvack.org