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 96D7AC433EF for ; Thu, 30 Dec 2021 19:11:38 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 0B6816B0071; Thu, 30 Dec 2021 14:11:38 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 064B76B0072; Thu, 30 Dec 2021 14:11:38 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id E6BF76B0074; Thu, 30 Dec 2021 14:11:37 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0051.hostedemail.com [216.40.44.51]) by kanga.kvack.org (Postfix) with ESMTP id D95076B0071 for ; Thu, 30 Dec 2021 14:11:37 -0500 (EST) Received: from smtpin18.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 7DB6C181AC9C6 for ; Thu, 30 Dec 2021 19:11:37 +0000 (UTC) X-FDA: 78975404634.18.5969555 Received: from mail-io1-f51.google.com (mail-io1-f51.google.com [209.85.166.51]) by imf23.hostedemail.com (Postfix) with ESMTP id EC3ED140003 for ; Thu, 30 Dec 2021 19:11:25 +0000 (UTC) Received: by mail-io1-f51.google.com with SMTP id y70so30678443iof.2 for ; Thu, 30 Dec 2021 11:11:36 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=HzwQpdJfvXsIjvjm8A0dpq6ENpHszfKPhEy/ULrVWJ4=; b=iom+1/8VmJ76MSkm1gBmvL6xy5Ymq0fjqRaj3NQK4PJBCxS7CIAleK7ritCCUVbiQT 8weXhQEzqspioYExHn0+s1VViizWSOWQb26AWFwOEJoRPTiw1Ds2CBJUTNcsMuuR0kHg KSBWGgRsWvhk8dTcs7hu8cOEv5OtoZ2FaTy6fLcZy960ry/YqbJb7UNeixLzUDHmIrmP kpxVj+5Mu6+4L8gBYFyHFGebCWUiQYeppachhBECvmhai84hev27ysYy1HlY3SDPfEkv M5x02Ycd66APnQJovkSbJiUpjTCbauPHkDHLJaoBkSmwWnjE3qI5D4YZ+OvBFIDChWqf OTjg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=HzwQpdJfvXsIjvjm8A0dpq6ENpHszfKPhEy/ULrVWJ4=; b=E7eCePMtQ4KQ7yfo4neuEDUeyxRYOO2T/XSdXltpW652CYNwCKKsVraazwV8heeSms TBvTwuKc4g4DQHLQ6XX1+reQANyGR2pRlp5ydEYVq7cWn5nGc32+wvRk/oz6UhJIwQ95 +5D3kMFSuNma4CAtV1sSHpG5qBSPgUR3OglUQER860xJvw8RkPWZBCLNj0AHDudgMyD0 fMTcbu4xNtNnBeDO5SIIKZkLMIKZvvOmDQ6WSwg+8Uf+fqeTfZsNbWsY228qan6ObuDp NY8Arc3QeitnacGgDKMWGfOuiuCg7P9iBP4CV69+mtej2fjLxKlLwS31Zb8pqGOAyD7h +REg== X-Gm-Message-State: AOAM530/q/NPfPsTdALsrAI0K+P9Ko66y3rK1jYPu+aE0JEpT4+7o7EA 9Xj+MoT8GrVeiScEFw+uxPZXhjM9BVtAhfaMJmQ= X-Google-Smtp-Source: ABdhPJzywR0tUS/YbXABKXiDtcZoK0y/MajMtL10XrFJoxpViErAv/2h3+/uaPrtRuKXehdRb33ESdy0D7IPiYNF5oc= X-Received: by 2002:a02:b11a:: with SMTP id r26mr14612485jah.22.1640891496450; Thu, 30 Dec 2021 11:11:36 -0800 (PST) MIME-Version: 1.0 References: <92f3029f3647ab355450ed5c8252bad8cfae1e09.1640036051.git.andreyknvl@google.com> In-Reply-To: From: Andrey Konovalov Date: Thu, 30 Dec 2021 20:11:25 +0100 Message-ID: Subject: Re: [PATCH mm v4 07/39] mm: clarify __GFP_ZEROTAGS comment To: Alexander Potapenko Cc: andrey.konovalov@linux.dev, Marco Elver , Andrew Morton , Dmitry Vyukov , Andrey Ryabinin , kasan-dev , Linux Memory Management List , Vincenzo Frascino , Catalin Marinas , Will Deacon , Mark Rutland , Linux ARM , Peter Collingbourne , Evgenii Stepanov , LKML , Andrey Konovalov Content-Type: text/plain; charset="UTF-8" Authentication-Results: imf23.hostedemail.com; dkim=pass header.d=gmail.com header.s=20210112 header.b="iom+1/8V"; spf=pass (imf23.hostedemail.com: domain of andreyknvl@gmail.com designates 209.85.166.51 as permitted sender) smtp.mailfrom=andreyknvl@gmail.com; dmarc=pass (policy=none) header.from=gmail.com X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: EC3ED140003 X-Stat-Signature: 71epi79uk5rs9a4xofuhkuz7fkwbwok7 X-HE-Tag: 1640891485-958206 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 Tue, Dec 21, 2021 at 10:17 AM Alexander Potapenko wrote: > > On Mon, Dec 20, 2021 at 10:59 PM wrote: > > > > From: Andrey Konovalov > > Reviewed-by: Alexander Potapenko > > > > > __GFP_ZEROTAGS is intended as an optimization: if memory is zeroed during > > allocation, it's possible to set memory tags at the same time with little > > performance impact. > Perhaps you could mention this intention explicitly in the comment? > Right now it still doesn't reference performance. Sure, will do in v5. Thanks!