From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1E775C49ED9 for ; Thu, 12 Sep 2019 09:32:56 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id D330420830 for ; Thu, 12 Sep 2019 09:32:55 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D330420830 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.cz Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 387E76B0003; Thu, 12 Sep 2019 05:32:55 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 3382C6B0005; Thu, 12 Sep 2019 05:32:55 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 24EBC6B0006; Thu, 12 Sep 2019 05:32:55 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0068.hostedemail.com [216.40.44.68]) by kanga.kvack.org (Postfix) with ESMTP id 045D56B0003 for ; Thu, 12 Sep 2019 05:32:54 -0400 (EDT) Received: from smtpin25.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with SMTP id 9AF2B181AC9B6 for ; Thu, 12 Sep 2019 09:32:54 +0000 (UTC) X-FDA: 75925754268.25.bead43_70a7c6e45e955 X-HE-Tag: bead43_70a7c6e45e955 X-Filterd-Recvd-Size: 1917 Received: from mx1.suse.de (mx2.suse.de [195.135.220.15]) by imf21.hostedemail.com (Postfix) with ESMTP for ; Thu, 12 Sep 2019 09:32:54 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 82A3EAD4B; Thu, 12 Sep 2019 09:32:51 +0000 (UTC) Subject: Re: [PATCH v3 4/4] mm, slab_common: Make the loop for initializing KMALLOC_DMA start from 1 To: Pengfei Li Cc: Andrew Morton , Christopher Lameter , penberg@kernel.org, rientjes@google.com, iamjoonsoo.kim@lge.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Roman Gushchin References: <20190910012652.3723-1-lpf.vector@gmail.com> <20190910012652.3723-5-lpf.vector@gmail.com> <23cb75f5-4a05-5901-2085-8aeabc78c100@suse.cz> From: Vlastimil Babka Message-ID: <1f1923e7-20a5-71b1-910c-5357a9143317@suse.cz> Date: Thu, 12 Sep 2019 11:32:50 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 9/11/19 4:33 PM, Pengfei Li wrote: > In the past two days, I am working on what you suggested. Great! > So far, I have completed the coding work, but I need some time to make > sure there are no bugs and verify the impact on performance. It would probably be hard to measure with sufficient confidence in terms of runtime performance, but you could use e.g. ./scripts/bloat-o-meter to look for unexpected code increase due to compile-time optimizations becoming runtime.