From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751275AbdAYFqY (ORCPT ); Wed, 25 Jan 2017 00:46:24 -0500 Received: from LGEAMRELO13.lge.com ([156.147.23.53]:36893 "EHLO lgeamrelo13.lge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751137AbdAYFqX (ORCPT ); Wed, 25 Jan 2017 00:46:23 -0500 X-Original-SENDERIP: 156.147.1.126 X-Original-MAILFROM: minchan@kernel.org X-Original-SENDERIP: 165.244.249.23 X-Original-MAILFROM: minchan@kernel.org X-Original-SENDERIP: 10.177.223.161 X-Original-MAILFROM: minchan@kernel.org Date: Wed, 25 Jan 2017 14:44:16 +0900 From: Minchan Kim To: Sergey Senozhatsky CC: Matthew Wilcox , zhouxianrong , Joonsoo Kim , , , , , , , , , , Subject: Re: [PATCH] mm: extend zero pages to same element pages for zram Message-ID: <20170125054416.GC18289@bbox> References: <20170123062716.GF24581@js1304-P5Q-DELUXE> <20170123071339.GD2327@jagdpanzerIV.localdomain> <20170123074054.GA12782@bbox> <1ac33960-b523-1c58-b2de-8f6ddb3a5219@huawei.com> <20170125012905.GA17937@bbox> <20170125013244.GB2234@jagdpanzerIV.localdomain> <20170125024835.GA24387@bombadil.infradead.org> <20170125041857.GC2234@jagdpanzerIV.localdomain> <20170125045137.GA18289@bbox> <20170125053849.GF2234@jagdpanzerIV.localdomain> MIME-Version: 1.0 In-Reply-To: <20170125053849.GF2234@jagdpanzerIV.localdomain> User-Agent: Mutt/1.5.24 (2015-08-30) X-MIMETrack: Itemize by SMTP Server on LGEKRMHUB05/LGE/LG Group(Release 8.5.3FP6|November 21, 2013) at 2017/01/25 14:44:18, Serialize by Router on LGEKRMHUB05/LGE/LG Group(Release 8.5.3FP6|November 21, 2013) at 2017/01/25 14:44:18, Serialize complete at 2017/01/25 14:44:18 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jan 25, 2017 at 02:38:49PM +0900, Sergey Senozhatsky wrote: > On (01/25/17 13:51), Minchan Kim wrote: > [..] > > > Minchan, zhouxianrong, I was completely wrong. we can't > > > do memset(). d'oh, I did not know it truncates 4 bytes to > > > one byte only (doesn't make too much sense to me). > > > > Now, I read Matthew's comment and understood. Thanks. > > It means zhouxianrong's patch I sent recently is okay? > > this one looks OK to me > https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg1316290.html > > > I'd agree with Joonsoo that doing forward prefetching is _probably_ better > than backwards prefetching. not that it necessarily should confuse the CPU > (need to google if ARM handles it normally), but still. Okay, let's settle down. zhouxianrong, please resend one Sergey pointed out with changing to forward loop. though, sorry for a lot confusion! > > -ss > > -- > 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