From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1764712AbXGZGRr (ORCPT ); Thu, 26 Jul 2007 02:17:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751415AbXGZGRj (ORCPT ); Thu, 26 Jul 2007 02:17:39 -0400 Received: from smtp107.mail.mud.yahoo.com ([209.191.85.217]:44596 "HELO smtp107.mail.mud.yahoo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1751313AbXGZGRi (ORCPT ); Thu, 26 Jul 2007 02:17:38 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com.au; h=Received:X-YMail-OSG:Message-ID:Date:From:User-Agent:X-Accept-Language:MIME-Version:To:CC:Subject:References:In-Reply-To:Content-Type:Content-Transfer-Encoding; b=Of+lMnC9s1ppBW1ftkfpgE5F3uhiZYStCFprAxZt6JiB6WAh6R5HNt2o/uRMXT/F8IgywHrp4XNYMS/2SO8Pp1jlOdivhmgnZ7IpKpU+lNiLTRhWHJY5EQfGm2xmEfZDLKyFhQ0Er+hGEkQ3zIzTVWYg8ls6ba5Y/CE7puucrMQ= ; X-YMail-OSG: 4KhPCyMVM1kjM2GdYMq1.6j_HKlz81Haa20pRHZUhIasLawJMWm5k9M_Hd01ve02bUFG1CGG_g-- Message-ID: <46A83C7A.80601@yahoo.com.au> Date: Thu, 26 Jul 2007 16:17:30 +1000 From: Nick Piggin User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.12) Gecko/20051007 Debian/1.7.12-1 X-Accept-Language: en MIME-Version: 1.0 To: Andrew Morton CC: Ray Lee , Eric St-Laurent , Rene Herman , Jesper Juhl , ck list , Ingo Molnar , Paul Jackson , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: -mm merge plans for 2.6.23 References: <20070710013152.ef2cd200.akpm@linux-foundation.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> <46A6D7D2.4050708@gmail.com> <1185341449.7105.53.camel@perkele> <46A6E1A1.4010508@yahoo.com.au> <2c0942db0707250909r435fef75sa5cbf8b1c766000b@mail.gmail.com> <20070725215717.df1d2eea.akpm@linux-foundation.org> <46A836E1.1000404@yahoo.com.au> <20070725230609.d2d1be59.akpm@linux-foundation.org> In-Reply-To: <20070725230609.d2d1be59.akpm@linux-foundation.org> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Andrew Morton wrote: > On Thu, 26 Jul 2007 15:53:37 +1000 Nick Piggin wrote: > > >>Not that I want to say anything about swap prefetch getting merged: my >>inbox is already full of enough "helpful suggestions" about that, > > > give them the kernel interfaces, they can do it themselves ;) It is a good idea if we can give enough to get started. Then if they run into something they really need to do in the kernel, we can take a look. Page eviction order / prefetch-back-in-order might be tricky to expose. >>so I'll >>just be happy to have a look at little things like updatedb. > > > Yes, that is a little thing. I mean, even if the kernel's behaviour > during an updatedb run was "perfect" (ie: does what we the designers > curently intend it to do (whatever that is)) then the core problem isn't > solved: short-term workload evicts your working set and you have to > synchronously reestablish it. Sure, I know and I was never against swap (and/or file) prefetching to solve this problem. I'm just saying, I'm staying out of that :) -- SUSE Labs, Novell Inc. From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <46A83C7A.80601@yahoo.com.au> Date: Thu, 26 Jul 2007 16:17:30 +1000 From: Nick Piggin MIME-Version: 1.0 Subject: Re: -mm merge plans for 2.6.23 References: <20070710013152.ef2cd200.akpm@linux-foundation.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> <46A6D7D2.4050708@gmail.com> <1185341449.7105.53.camel@perkele> <46A6E1A1.4010508@yahoo.com.au> <2c0942db0707250909r435fef75sa5cbf8b1c766000b@mail.gmail.com> <20070725215717.df1d2eea.akpm@linux-foundation.org> <46A836E1.1000404@yahoo.com.au> <20070725230609.d2d1be59.akpm@linux-foundation.org> In-Reply-To: <20070725230609.d2d1be59.akpm@linux-foundation.org> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Andrew Morton Cc: Ray Lee , Eric St-Laurent , Rene Herman , Jesper Juhl , ck list , Ingo Molnar , Paul Jackson , linux-mm@kvack.org, linux-kernel@vger.kernel.org List-ID: Andrew Morton wrote: > On Thu, 26 Jul 2007 15:53:37 +1000 Nick Piggin wrote: > > >>Not that I want to say anything about swap prefetch getting merged: my >>inbox is already full of enough "helpful suggestions" about that, > > > give them the kernel interfaces, they can do it themselves ;) It is a good idea if we can give enough to get started. Then if they run into something they really need to do in the kernel, we can take a look. Page eviction order / prefetch-back-in-order might be tricky to expose. >>so I'll >>just be happy to have a look at little things like updatedb. > > > Yes, that is a little thing. I mean, even if the kernel's behaviour > during an updatedb run was "perfect" (ie: does what we the designers > curently intend it to do (whatever that is)) then the core problem isn't > solved: short-term workload evicts your working set and you have to > synchronously reestablish it. Sure, I know and I was never against swap (and/or file) prefetching to solve this problem. I'm just saying, I'm staying out of that :) -- SUSE Labs, Novell Inc. -- 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