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=-13.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_IN_DEF_DKIM_WL 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 4DB2FC43462 for ; Tue, 18 May 2021 15:45:01 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id CA94F61261 for ; Tue, 18 May 2021 15:45:00 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CA94F61261 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.microsoft.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id E07BE6B00D9; Tue, 18 May 2021 11:44:59 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id DDE436B00DA; Tue, 18 May 2021 11:44:59 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id CA6EF6B00DB; Tue, 18 May 2021 11:44:59 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0190.hostedemail.com [216.40.44.190]) by kanga.kvack.org (Postfix) with ESMTP id 9BE256B00D9 for ; Tue, 18 May 2021 11:44:59 -0400 (EDT) Received: from smtpin15.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 37650181AEF1E for ; Tue, 18 May 2021 15:44:59 +0000 (UTC) X-FDA: 78154775118.15.AB9EE59 Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by imf20.hostedemail.com (Postfix) with ESMTP id 7F99678C for ; Tue, 18 May 2021 15:44:58 +0000 (UTC) Received: from mail-pj1-f51.google.com (mail-pj1-f51.google.com [209.85.216.51]) by linux.microsoft.com (Postfix) with ESMTPSA id 7281220B8010 for ; Tue, 18 May 2021 08:44:57 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 7281220B8010 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1621352697; bh=3HQYFgD4lxpqADotbbiCx33GTkFHpxK08+XG1XtrjPI=; h=References:In-Reply-To:From:Date:Subject:To:Cc:From; b=aAkJCclcikW+/0HQ2xhJWDmuSo5v7++8kyppG7KPOk4FYls1Zr4KkH7FOig1KrT0x ntrA36/umwOyfuecwNuHVZ6ntToWOuTNJ0pu0kn1/nZnuU2sMxEQYFplD9v8InxJ4P aQ39IUDGyxvZV8dxu0tCsJ9FJ0BqtoIMKvM4COxg= Received: by mail-pj1-f51.google.com with SMTP id ne24-20020a17090b3758b029015f2dafecb0so601861pjb.4 for ; Tue, 18 May 2021 08:44:57 -0700 (PDT) X-Gm-Message-State: AOAM530DQteCo1abK66FXVIiTgRbvgkv9WuIC4afvsmfZqCJdLWkOCnQ hnHnJ0F6yEpRxP8TDpBk1r6bPQcODLPE57ebdqc= X-Google-Smtp-Source: ABdhPJyH71DOHHf5vAHuwNoiGYshpXvPej6HckHw0XokpfXTIkipE9bPqtisiMcZNB0rqtLKF6U49DPWaygEV8C2+PI= X-Received: by 2002:a17:902:bc88:b029:ee:7ef1:e770 with SMTP id bb8-20020a170902bc88b02900ee7ef1e770mr5296175plb.19.1621352697022; Tue, 18 May 2021 08:44:57 -0700 (PDT) MIME-Version: 1.0 References: <20210513165846.23722-1-mcroce@linux.microsoft.com> <20210513165846.23722-2-mcroce@linux.microsoft.com> In-Reply-To: From: Matteo Croce Date: Tue, 18 May 2021 17:44:21 +0200 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH net-next v5 1/5] mm: add a signature in struct page To: Matthew Wilcox Cc: netdev@vger.kernel.org, linux-mm@kvack.org, Ayush Sawal , Vinay Kumar Yadav , Rohit Maheshwari , "David S. Miller" , Jakub Kicinski , Thomas Petazzoni , Marcin Wojtas , Russell King , Mirko Lindner , Stephen Hemminger , Tariq Toukan , Jesper Dangaard Brouer , Ilias Apalodimas , Alexei Starovoitov , Daniel Borkmann , John Fastabend , Boris Pismenny , Arnd Bergmann , Andrew Morton , "Peter Zijlstra (Intel)" , Vlastimil Babka , Yu Zhao , Will Deacon , Fenghua Yu , Roman Gushchin , Hugh Dickins , Peter Xu , Jason Gunthorpe , Jonathan Lemon , Alexander Lobakin , Cong Wang , wenxu , Kevin Hao , Jakub Sitnicki , Marco Elver , Willem de Bruijn , Miaohe Lin , Yunsheng Lin , Guillaume Nault , linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, bpf@vger.kernel.org, Eric Dumazet , David Ahern , Lorenzo Bianconi , Saeed Mahameed , Andrew Lunn , Paolo Abeni , Sven Auhagen Content-Type: text/plain; charset="UTF-8" Authentication-Results: imf20.hostedemail.com; dkim=pass header.d=linux.microsoft.com header.s=default header.b=aAkJCclc; dmarc=pass (policy=none) header.from=linux.microsoft.com; spf=pass (imf20.hostedemail.com: domain of mcroce@linux.microsoft.com designates 13.77.154.182 as permitted sender) smtp.mailfrom=mcroce@linux.microsoft.com X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 7F99678C X-Stat-Signature: 4crn86rb4y9p3pdfsschmccmyyqx3n36 X-HE-Tag: 1621352698-442647 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 Fri, May 14, 2021 at 3:01 AM Matthew Wilcox wrote: > > I feel like I want to document the pfmemalloc bit in mm_types.h, > but I don't have a concrete suggestion yet. > Maybe simply: /* Bit zero is set * Bit one if pfmemalloc page */ unsigned long compound_head; Regards, -- per aspera ad upstream