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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_2 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 C2EE9C10F14 for ; Tue, 8 Oct 2019 13:33:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9F2A520815 for ; Tue, 8 Oct 2019 13:33:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730921AbfJHNdn (ORCPT ); Tue, 8 Oct 2019 09:33:43 -0400 Received: from mail.kernel.org ([198.145.29.99]:59772 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730301AbfJHNdm (ORCPT ); Tue, 8 Oct 2019 09:33:42 -0400 Received: from gandalf.local.home (cpe-66-24-58-225.stny.res.rr.com [66.24.58.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 522E320673; Tue, 8 Oct 2019 13:33:41 +0000 (UTC) Date: Tue, 8 Oct 2019 09:33:39 -0400 From: Steven Rostedt To: Qian Cai Cc: Petr Mladek , Michal Hocko , sergey.senozhatsky.work@gmail.com, peterz@infradead.org, linux-mm@kvack.org, john.ogness@linutronix.de, akpm@linux-foundation.org, david@redhat.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2] mm/page_isolation: fix a deadlock with printk() Message-ID: <20191008093339.7092313b@gandalf.local.home> In-Reply-To: <1570541032.5576.297.camel@lca.pw> References: <1570228005-24979-1-git-send-email-cai@lca.pw> <20191007143002.l37bt2lzqtnqjqxu@pathway.suse.cz> <1570460350.5576.290.camel@lca.pw> <20191007151237.GP2381@dhcp22.suse.cz> <1570462407.5576.292.camel@lca.pw> <20191008081510.ptwmb7zflqiup5py@pathway.suse.cz> <20191008091349.6195830d@gandalf.local.home> <1570541032.5576.297.camel@lca.pw> X-Mailer: Claws Mail 3.17.3 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 08 Oct 2019 09:23:52 -0400 Qian Cai wrote: > I feel like that is what I trying to do, but there seems a lot of resistances > with that approach where pragmatism met with perfectionism. It's the way it came across. It sounded as if you were proposing "the solution". I'm coming out and explicitly saying that this may be a "temporary solution", as having "printk_deferred()" we can easily remove them when that becomes the default operation. -- Steve