Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751487Ab3C1Rhf (ORCPT ); Thu, 28 Mar 2013 13:37:35 -0400 Received: from aserp1040.oracle.com ([141.146.126.69]:19340 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750777Ab3C1Rhe convert rfc822-to-8bit (ORCPT ); Thu, 28 Mar 2013 13:37:34 -0400 MIME-Version: 1.0 Message-ID: <125abdf8-0af9-447b-8782-68acf1c9c229@default> Date: Thu, 28 Mar 2013 10:35:52 -0700 (PDT) From: Dan Magenheimer To: Hugh Dickins Cc: Minchan Kim , Andrew Morton , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Seth Jennings , Nitin Gupta , Konrad Rzeszutek Wilk , Shaohua Li , Kamezawa Hiroyuki , Bob Liu Subject: RE: [RFC] mm: remove swapcache page early References: <1364350932-12853-1-git-send-email-minchan@kernel.org> <433aaa17-7547-4e39-b472-7060ee15e85f@default> In-Reply-To: X-Priority: 3 X-Mailer: Oracle Beehive Extensions for Outlook 2.0.1.7 (607090) [OL 12.0.6668.5000 (x86)] Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8BIT X-Source-IP: acsinet21.oracle.com [141.146.126.237] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1324 Lines: 36 > From: Hugh Dickins [mailto:hughd@google.com] > Subject: RE: [RFC] mm: remove swapcache page early > > On Wed, 27 Mar 2013, Dan Magenheimer wrote: > > > From: Hugh Dickins [mailto:hughd@google.com] > > > Subject: Re: [RFC] mm: remove swapcache page early > > > > > The issue you are raising > > here is (2). You may not know that (2) has recently been solved > > in frontswap, at least for zcache. See frontswap_exclusive_gets_enabled. > > If this is enabled (and it is for zcache but not yet for zswap), > > what you suggest (SetPageDirty) is what happens. > > Ah, and I have a dim, perhaps mistaken, memory that I gave you > input on that before, suggesting the SetPageDirty. Good, sounds > like the solution is already in place, if not actually activated. > > Thanks, must dash, > Hugh Hi Hugh -- Credit where it is due... Yes, I do recall now that the idea was originally yours. It went on a to-do list where I eventually tried it and it worked... I'm sorry I had forgotten and neglected to give you credit! (BTW, it is activated for zcache in 3.9.) Thanks, Dan -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/