From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx152.postini.com [74.125.245.152]) by kanga.kvack.org (Postfix) with SMTP id 6CF226B0038 for ; Tue, 5 Feb 2013 21:18:55 -0500 (EST) Received: by mail-oa0-f44.google.com with SMTP id h1so1001357oag.17 for ; Tue, 05 Feb 2013 18:18:54 -0800 (PST) Message-ID: <1360117134.2403.4.camel@kernel.cn.ibm.com> Subject: Re: [LSF/MM TOPIC] In-kernel compression in the MM subsystem From: Simon Jeons Date: Tue, 05 Feb 2013 20:18:54 -0600 In-Reply-To: <601542b0-4c92-4d90-aed8-826235c06eab@default> References: <601542b0-4c92-4d90-aed8-826235c06eab@default> Content-Type: text/plain; charset="UTF-8" Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Dan Magenheimer Cc: lsf-pc@lists.linux-foundation.org, linux-mm@kvack.org, Seth Jennings , Nitin Gupta , Konrad Wilk , Minchan Kim Hi Dan, On Sat, 2013-01-26 at 12:16 -0800, Dan Magenheimer wrote: > There's lots of interesting things going on in kernel memory > management, but one only(?) increases the effective amount > of data that can be stored in a fixed amount of RAM: in-kernel > compression. > > Since ramzswap/compcache (now zram) was first proposed in 2009 > as an in-memory compressed swap device, there have been a number > of in-kernel compression solutions proposed, including > zcache, kztmem, and now zswap. Each shows promise to improve > performance by using compression under memory pressure to > reduce I/O due to swapping and/or paging. Each is still > in staging (though zram may be promoted by LSFMM 2013) > because each also brings a number of perplexing challenges. > > I think it's time to start converging on which one or more > of these solutions, if any, should be properly promoted and > more fully integrated into the kernel memory management > subsystem. Before this can occur, it's important to build a > broader understanding and, hopefully, also a broader consensus > among the MM community on a number of key challenges and questions > in order to guide and drive further development and merging. > > I would like to collect a list of issues/questions, and > start a discussion at LSF/MM by presenting this list, select > the most important, then lead a discussion on how ever many > there is time for. Most likely this is an MM-only discussion > though a subset might be suitable for a cross-talk presentataion. > Is there benchmark to test each component in tmem? > Thanks! > Dan Magenheimer > LSF/MM attendee 2010,2011,2012 > LSF/MM presenter (MM track) 2011,2012 > > > -- > 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 -- 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