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 8264AC43460 for ; Tue, 18 May 2021 15:45:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6908E6117A for ; Tue, 18 May 2021 15:45:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350288AbhERPqQ (ORCPT ); Tue, 18 May 2021 11:46:16 -0400 Received: from linux.microsoft.com ([13.77.154.182]:54446 "EHLO linux.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1350273AbhERPqP (ORCPT ); Tue, 18 May 2021 11:46:15 -0400 Received: from mail-pl1-f178.google.com (mail-pl1-f178.google.com [209.85.214.178]) by linux.microsoft.com (Postfix) with ESMTPSA id 6016C20B7188; Tue, 18 May 2021 08:44:57 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 6016C20B7188 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-pl1-f178.google.com with SMTP id s4so3753280plg.12; Tue, 18 May 2021 08:44:57 -0700 (PDT) X-Gm-Message-State: AOAM531qjQTQ8yutVE4m2F6w1hajF6tHAx7wLhTefLKPyxAu3OV76w2D B+fJ2jhlSgJSLxkQYv4iQ5jaMafjtot5ku8Z4fs= 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" Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org 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