From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx184.postini.com [74.125.245.184]) by kanga.kvack.org (Postfix) with SMTP id 144F36B0005 for ; Sat, 23 Feb 2013 20:40:05 -0500 (EST) Received: by mail-pa0-f47.google.com with SMTP id bj3so1139100pad.6 for ; Sat, 23 Feb 2013 17:40:05 -0800 (PST) Message-ID: <51296F49.40103@gmail.com> Date: Sun, 24 Feb 2013 09:39:21 +0800 From: Ric Mason MIME-Version: 1.0 Subject: Re: [PATCH 0/7] ksm: responses to NUMA review References: <5126E987.7020809@gmail.com> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Hugh Dickins Cc: Andrew Morton , Mel Gorman , Petr Holasek , Andrea Arcangeli , Izik Eidus , linux-kernel@vger.kernel.org, linux-mm@kvack.org On 02/23/2013 04:38 AM, Hugh Dickins wrote: > On Fri, 22 Feb 2013, Ric Mason wrote: >> On 02/21/2013 04:17 PM, Hugh Dickins wrote: >>> Here's a second KSM series, based on mmotm 2013-02-19-17-20: partly in >>> response to Mel's review feedback, partly fixes to issues that I found >>> myself in doing more review and testing. None of the issues fixed are >>> truly show-stoppers, though I would prefer them fixed sooner than later. >> Do you have any ideas ksm support page cache and tmpfs? > No. It's only been asked as a hypothetical question: I don't know of > anyone actually needing it, and I wouldn't have time to do it myself. > > It would be significantly more invasive than just dealing with anonymous > memory: with anon, we already have the infrastructure for read-only pages, > but we don't at present have any notion of read-only pagecache. > > Just doing it in tmpfs? Well, yes, that might be easier: since v3.1's > radix_tree rework, shmem/tmpfs mostly goes through its own interfaces > to pagecache, so read-only pagecache, and hence KSM, might be easier > to implement there than more generally. Ok, are there potential users to take advantage of it? > > Hugh -- 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