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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7D347ECAAA2 for ; Mon, 29 Aug 2022 03:11:24 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id DCB5394000C; Sun, 28 Aug 2022 23:11:23 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id D5345940007; Sun, 28 Aug 2022 23:11:23 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id BF3D094000C; Sun, 28 Aug 2022 23:11:23 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0014.hostedemail.com [216.40.44.14]) by kanga.kvack.org (Postfix) with ESMTP id ACD89940007 for ; Sun, 28 Aug 2022 23:11:23 -0400 (EDT) Received: from smtpin31.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay04.hostedemail.com (Postfix) with ESMTP id 7A8C71A031C for ; Mon, 29 Aug 2022 03:11:23 +0000 (UTC) X-FDA: 79851154446.31.76E8B01 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf24.hostedemail.com (Postfix) with ESMTP id 65D84180051 for ; Mon, 29 Aug 2022 03:11:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=ESNFROrcZJEEi6r5Sr5ADU4pjlxJwiGL170S05x8m8Q=; b=hyHErqalSooZH1NlAhWaSRolp9 ku0bRyrgBzF2ZjauYmJYTEwV3TSrCpNo+/AhJUHoxeDKAOjgUMzmqdUa3oG8njDm+BC1S1W7U6Btu Ill947hRuY+oMoSavvAmsuBF1PkXUngOgZbY/Dimamyt7mOo+06yLyxv0/Ake46wf3E5CyEMXkudI pTrymqVqGnwJ9na98Dgqy5ZM3uZWtowBcPn8us3ADHhY2QbkJWBU2goGCE3TIMGUwD7TR95i+d41k hmVXWYiyMVlgGmJYPpP4xsfJDnp8R6slEHtPxraE7KgodYCauqovwY0jw3xWfe01PU0BycKGapSje QjQDUf9g==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1oSVB2-002jbq-Bk; Mon, 29 Aug 2022 03:11:04 +0000 Date: Mon, 29 Aug 2022 04:11:04 +0100 From: Matthew Wilcox To: Dawei Li Cc: cl@linux.com, penberg@kernel.org, rientjes@google.com, iamjoonsoo.kim@lge.com, akpm@linux-foundation.org, vbabka@suse.cz, roman.gushchin@linux.dev, 42.hyeyoo@gmail.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] mm: simplify size2index conversion of __kmalloc_index Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: ARC-Authentication-Results: i=1; imf24.hostedemail.com; dkim=pass header.d=infradead.org header.s=casper.20170209 header.b=hyHErqal; spf=none (imf24.hostedemail.com: domain of willy@infradead.org has no SPF policy when checking 90.155.50.34) smtp.mailfrom=willy@infradead.org; dmarc=none ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1661742682; a=rsa-sha256; cv=none; b=HK1++/CzuVjlwUNGKqDw+1sDKyUEAoS0o5cekZlkoal69o4quHF9rP7fOm1Dctr3iOrCeb ziwWwUG0Ph+C5fVUFWJtTx5SVSgtYoORavuzAdUUKX1reLUFe4BmSSlnQnH4YNPvmCicLw 5mEf01BiGAJrKao0IBzGUOcsFjPaQ6o= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1661742682; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=ESNFROrcZJEEi6r5Sr5ADU4pjlxJwiGL170S05x8m8Q=; b=BQRC/h5TadnRWy4+8CwkTqAAdkxt2sBrTksAnNTgxf/fAA+QJo8UPHFD5wKo7YmMvip+WF yMnptGsfyYH2bT6AeEe6WxI5lzCYpdXIOhHr4GmwwGItiKCTsagijyeXHskl8iH1itB441 X99tdE5oXPBK9WADafHLH3fm2csy3Vc= Authentication-Results: imf24.hostedemail.com; dkim=pass header.d=infradead.org header.s=casper.20170209 header.b=hyHErqal; spf=none (imf24.hostedemail.com: domain of willy@infradead.org has no SPF policy when checking 90.155.50.34) smtp.mailfrom=willy@infradead.org; dmarc=none X-Stat-Signature: pure6iqsmwqsy4cjxip6up415rqpc8us X-Rspamd-Queue-Id: 65D84180051 X-Rspam-User: X-Rspamd-Server: rspam04 X-HE-Tag: 1661742682-110665 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 Sun, Aug 28, 2022 at 11:14:48PM +0800, Dawei Li wrote: > Current size2index is implemented by one to one hardcode mapping, > which can be improved by order_base_2(). > Must be careful to not violate compile-time optimization rule. This patch has been NACKed before (when submitted by other people).