From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pg0-f70.google.com (mail-pg0-f70.google.com [74.125.83.70]) by kanga.kvack.org (Postfix) with ESMTP id 4E6276B025E for ; Wed, 25 Jan 2017 00:46:22 -0500 (EST) Received: by mail-pg0-f70.google.com with SMTP id 204so263230556pge.5 for ; Tue, 24 Jan 2017 21:46:22 -0800 (PST) Received: from lgeamrelo13.lge.com (LGEAMRELO13.lge.com. [156.147.23.53]) by mx.google.com with ESMTP id z62si22241488pgz.214.2017.01.24.21.46.20 for ; Tue, 24 Jan 2017 21:46:21 -0800 (PST) Date: Wed, 25 Jan 2017 14:44:16 +0900 From: Minchan 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> Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline Sender: owner-linux-mm@kvack.org List-ID: To: Sergey Senozhatsky Cc: Matthew Wilcox , zhouxianrong , Joonsoo Kim , linux-mm@kvack.org, linux-kernel@vger.kernel.org, akpm@linux-foundation.org, sergey.senozhatsky@gmail.com, ngupta@vflare.org, Mi.Sophia.Wang@huawei.com, zhouxiyu@huawei.com, weidu.du@huawei.com, zhangshiming5@huawei.com, won.ho.park@huawei.com 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 -- 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