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=-2.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT autolearn=unavailable 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 CAF06C10F00 for ; Thu, 28 Feb 2019 04:45:26 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 648B6218AE for ; Thu, 28 Feb 2019 04:45:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="VdAJ8jKE" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 648B6218AE Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id C08168E0003; Wed, 27 Feb 2019 23:45:25 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id BB7988E0001; Wed, 27 Feb 2019 23:45:25 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id AA6358E0003; Wed, 27 Feb 2019 23:45:25 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from mail-pg1-f197.google.com (mail-pg1-f197.google.com [209.85.215.197]) by kanga.kvack.org (Postfix) with ESMTP id 68C7C8E0001 for ; Wed, 27 Feb 2019 23:45:25 -0500 (EST) Received: by mail-pg1-f197.google.com with SMTP id 202so14012199pgb.6 for ; Wed, 27 Feb 2019 20:45:25 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:dkim-signature:date:from:to:cc:subject :message-id:references:mime-version:content-disposition:in-reply-to :user-agent; bh=fgAty79c/lcTaOsIWZQePEkdQgJCu7xgRPDwcH+fVr0=; b=uPUtrYNqxAWIe4gQ0Nop8TiIkQOEKcWdqvOAmgE4G3qWJgCZ8H94weqZTScIQSxdP8 C2hEzh0lrd55RVZDKg7HIZVMdSDaFimvHPGCuG+E3JRE6QIruJtzgdUa+h4yhXAs0x2W xJ1bzeiTIr2hkanPS9BxOLxolkMsM9xGsWOuhI7j4sPV7x4p5wZEak6Q87/a9yQ2Xrw5 bXZiVhwWpRNXto+XOyVikAgM++Mu1x5tiHPjhoZwzqyycsdKWuJd2Un7TQeg78P9iu15 HONnYlaoaOEi2uY1cu+76By+8vcNWNgOVRyUhELEq6o6eTfhpm1kOXngL7L9F8GkgrjQ KL9A== X-Gm-Message-State: AHQUAubB+Q31Liji4EJYRrFeWPSsqH3dV+5VzbpnjfjRgn0oIbbSD0vn 65PM3Kbvhvaw7udBapsXgMeFoYVcDL4/ym8p6hv8GYXnQjF1a9YLNeDUZAF0ubS7KXz3FVPRPjG AxjwgdsTQbTjbxaAresKQL163LOAW+ysGoXqKCEuiZbrJ7q/8r157jozXpVQq+db9LDhYwV6Vju pNcpam8N6cn+894h9LzSbBnQTUQ5VhIajHVXWpL0GCSKm7W8dJESQTJjhViJPtqLcXs+kutSrSS m996ZUmzwa1zPDlpn0/orIWjFglF84wMXSZw3/djXAWDstd+OzHNH2aMD7CAxs0ez+VLmLHpIFE rqMEkCrMY51qHccq80dWOKG23EQbQklQK2quKtWylNIL0Oq10KiHC39Jq9WWTNhBKFlJ9kg86KL W X-Received: by 2002:a63:7403:: with SMTP id p3mr6497321pgc.343.1551329124895; Wed, 27 Feb 2019 20:45:24 -0800 (PST) X-Received: by 2002:a63:7403:: with SMTP id p3mr6497272pgc.343.1551329123927; Wed, 27 Feb 2019 20:45:23 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1551329123; cv=none; d=google.com; s=arc-20160816; b=AJce9f6crV/S8yJGrKvwLtui2xpyqpOGu/h9LkfcLmopz/WBj8gI5rvGEl5C/tvmOH +apHvbUM7eLlMRcojYS7qGwpSRj1GnbN0Kvj5XU5Yc1QhWCQ9H8XSH2Lvd1YjmRapx0W NtK5LMCOcytafEKrbOmpFyz6lLeck9om18Wb3Yx+p0TTDjOWwwD1YdMpGQPzTQ1gs/hM sTYhQT0ckB5T4TgzEHF5LywZKLmpLAzuJ3zqbNBPsLjVB+uXJA0278UVcnBzlL/YSPfF huVp9mZqd+OpPUPwlhV64hmhAKPuhsR3S46aPPZtNhj+TKQfLkoSo6uhp/m7ZWiAN8JF +7dQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=user-agent:in-reply-to:content-disposition:mime-version:references :message-id:subject:cc:to:from:date:dkim-signature; bh=fgAty79c/lcTaOsIWZQePEkdQgJCu7xgRPDwcH+fVr0=; b=oToV0kSpVY0sUAJbailRU6rqWC0km8jca1cBkFoqv6q3TfNFImrd625xcuZBvrfAUX irKm/iYwxLjcuRsel8x6r75gaRlDeBwt0tJTH2WLMa9qVEwOGai7u7qvfdcywPigIQ9+ u64zDjONbZWfSKEP/m0Luw5HhL/AaJ/LOUta1r/5z2kIqck72DvpfO1ipyD1qFhfezjt vvHwpm0Jt1WwfNDj2tXwUXONmoiR+dXWUfsrrVl1O02ySCFxci6afx4Y8Xuy6PWvGXY/ 6mXXaDt/IiOzQQNOpJp2wHMSY/oitEwhXoXoJYLcMVPzxixBwippHB2+dQqAItE7WqLX T0Ng== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=VdAJ8jKE; spf=pass (google.com: domain of sergey.senozhatsky.work@gmail.com designates 209.85.220.65 as permitted sender) smtp.mailfrom=sergey.senozhatsky.work@gmail.com; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: from mail-sor-f65.google.com (mail-sor-f65.google.com. [209.85.220.65]) by mx.google.com with SMTPS id 3sor26013725pls.12.2019.02.27.20.45.23 for (Google Transport Security); Wed, 27 Feb 2019 20:45:23 -0800 (PST) Received-SPF: pass (google.com: domain of sergey.senozhatsky.work@gmail.com designates 209.85.220.65 as permitted sender) client-ip=209.85.220.65; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=VdAJ8jKE; spf=pass (google.com: domain of sergey.senozhatsky.work@gmail.com designates 209.85.220.65 as permitted sender) smtp.mailfrom=sergey.senozhatsky.work@gmail.com; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=fgAty79c/lcTaOsIWZQePEkdQgJCu7xgRPDwcH+fVr0=; b=VdAJ8jKEkysg0W4tEP6OepXy9a85wkqBr2+SdikdbgRN9wtPzn8CvDsiDswiKvN3tg 5DIYKmgOg3sKbObRSFqDnpQJSnrF1lWv0ypOdbdhErhoc8R95t/qG7CmwtaNOF/r+c6O yvvLRqMtlq3vAXZWze43Bvq9D8KbtoPKXmi6DLbWGyPux8xQAQjudmruzzSDyFsUQXLe qP+MznCe8HZui9mZqYzcmGI8FklqNcJ7Lda/v8f0gdEqYvDfY9QdkUmsKqCUjxSLZ4oz dN6fq+gtNREHj4xu48tUo0SbRUAENoZ0r0nvBeOQVkznEZ0CoMZJtXLu3JirvkI/vREe h7Qg== X-Google-Smtp-Source: AHgI3IbmcnpWIW0bdA25pVX5YJj7DOMRjR3ZgFouaOsl6Zr+zykJpsNmSY/QARG7ODwR3pnNUGNZTA== X-Received: by 2002:a17:902:b591:: with SMTP id a17mr6109349pls.228.1551329123575; Wed, 27 Feb 2019 20:45:23 -0800 (PST) Received: from localhost ([110.70.46.182]) by smtp.gmail.com with ESMTPSA id i10sm5388057pgs.26.2019.02.27.20.45.21 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Wed, 27 Feb 2019 20:45:22 -0800 (PST) Date: Thu, 28 Feb 2019 13:45:19 +0900 From: Sergey Senozhatsky To: Tetsuo Handa Cc: Petr Mladek , Sergey Senozhatsky , Steven Rostedt , akpm@linux-foundation.org, linux-mm@kvack.org, Peter Zijlstra , Jan Kara , Tejun Heo , linux-kernel@vger.kernel.org, Sergey Senozhatsky Subject: Re: [PATCH] printk: Ratelimit messages printed by console drivers Message-ID: <20190228044519.GA32563@jagdpanzerIV> References: <20180420145720.hb7bbyd5xbm5je32@pathway.suse.cz> <20180420111307.44008fc7@gandalf.local.home> <20180423103232.k23yulv2e7fah42r@pathway.suse.cz> <20180423073603.6b3294ba@gandalf.local.home> <20180423124502.423fb57thvbf3zet@pathway.suse.cz> <20180425053146.GA25288@jagdpanzerIV> <20180426094211.okftwdzgfn72rik3@pathway.suse.cz> <20180427102245.GA591@jagdpanzerIV> <20180509120050.eyuprdh75grhdsh4@pathway.suse.cz> <63adb127-bb4b-d952-73f4-764d0cd78c52@i-love.sakura.ne.jp> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <63adb127-bb4b-d952-73f4-764d0cd78c52@i-love.sakura.ne.jp> User-Agent: Mutt/1.11.3 (2019-02-01) 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 (02/26/19 19:24), Tetsuo Handa wrote: > Does memory allocation by network stack / driver while trying to emit > the messages include __GFP_DIRECT_RECLAIM flag (e.g. GFP_KERNEL) ? > Commit 400e22499dd92613821 handles only memory allocations with > __GFP_DIRECT_RECLAIM flag. If memory allocation when trying to emit > the messages does not include __GFP_DIRECT_RECLAIM flag (e.g. > GFP_ATOMIC / GFP_NOWAIT), doesn't this particular problem still exist? Console drivers are always called from atomic contexts (including IRQ->printk->console_driver paths); if any console driver does a GFP_KERNEL allocation then it should be fixed. -ss