From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx121.postini.com [74.125.245.121]) by kanga.kvack.org (Postfix) with SMTP id BE3076B0033 for ; Thu, 16 May 2013 13:17:00 -0400 (EDT) Message-ID: <51951478.5010608@redhat.com> Date: Thu, 16 May 2013 13:16:40 -0400 From: Rik van Riel MIME-Version: 1.0 Subject: Re: [PATCHv11 3/4] zswap: add to mm/ References: <1368448803-2089-1-git-send-email-sjenning@linux.vnet.ibm.com> <1368448803-2089-4-git-send-email-sjenning@linux.vnet.ibm.com> In-Reply-To: <1368448803-2089-4-git-send-email-sjenning@linux.vnet.ibm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Seth Jennings Cc: Andrew Morton , Greg Kroah-Hartman , Nitin Gupta , Minchan Kim , Konrad Rzeszutek Wilk , Dan Magenheimer , Robert Jennings , Jenifer Hopper , Mel Gorman , Johannes Weiner , Larry Woodman , Benjamin Herrenschmidt , Dave Hansen , Joe Perches , Joonsoo Kim , Cody P Schafer , Hugh Dickens , Paul Mackerras , linux-mm@kvack.org, linux-kernel@vger.kernel.org, devel@driverdev.osuosl.org On 05/13/2013 08:40 AM, Seth Jennings wrote: > zswap is a thin compression backend for frontswap. It receives pages from > frontswap and attempts to store them in a compressed memory pool, resulting in > an effective partial memory reclaim and dramatically reduced swap device I/O. > > Additionally, in most cases, pages can be retrieved from this compressed store > much more quickly than reading from tradition swap devices resulting in faster > performance for many workloads. > > It also has support for evicting swap pages that are currently compressed in > zswap to the swap device on an LRU(ish) basis. This functionality is very > important and make zswap a true cache in that, once the cache is full or can't > grow due to memory pressure, the oldest pages can be moved out of zswap to the > swap device so newer pages can be compressed and stored in zswap. > > This patch adds the zswap driver to mm/ > > Signed-off-by: Seth Jennings Acked-by: Rik van Riel As an aside, I agree with Dan that CONFIG_EXPERIMENTAL might be appropriate here, or at least some kind of warning in the documentation stating that this is fairly new code that still needs to be shaken out in the real world. -- All rights reversed -- 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