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=-3.9 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 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 5E844C55179 for ; Fri, 23 Oct 2020 14:16:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F3F6024640 for ; Fri, 23 Oct 2020 14:16:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="WDuQx2Om" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750417AbgJWOQs (ORCPT ); Fri, 23 Oct 2020 10:16:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55788 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750414AbgJWOQr (ORCPT ); Fri, 23 Oct 2020 10:16:47 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AAD6EC0613CE; Fri, 23 Oct 2020 07:16:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=GVPYMjFqChMjoGfaKLO2uGqLmrcgLH9W7OOdDABUMfg=; b=WDuQx2OmH186JLLCT/V49+cHuG mvx3za9SySicasNgXKx5tLAGyLzzjMdStqRY5+gjhxGKEuIITG+UZILbK9cBxat+a10uw+lowMHgU A4XPvkubtIHPHZyepjYJtQzcRv+/NgS84fDmbjT3ffVSakzeJL/2clY9r2Aw1R+GJNBloYvsS8VlH rS3VhA77U5Ki78fsi0dokXGR1DF0mXSHs1jeElg3ld72bwPIscdEHnUWgCc6qd//dojfah5sbnF4f FA32w4nZVYBUke2t5rabYYM/cRMBDRJV6qjDaaaWY1XXsyx96exYVzQxYNvAH/xg57vNzc1lLniXd zPwjKFvQ==; Received: from willy by casper.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1kVxrf-0000gL-Pn; Fri, 23 Oct 2020 14:16:19 +0000 Date: Fri, 23 Oct 2020 15:16:19 +0100 From: Matthew Wilcox To: Daniel Vetter Cc: DRI Development , Intel Graphics Development , "Paul E . McKenney" , Christoph Lameter , Pekka Enberg , David Rientjes , Joonsoo Kim , Andrew Morton , Peter Zijlstra , Ingo Molnar , Vlastimil Babka , Mathieu Desnoyers , Sebastian Andrzej Siewior , Michel Lespinasse , Waiman Long , Thomas Gleixner , Randy Dunlap , linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, Dave Chinner , Qian Cai , linux-xfs@vger.kernel.org, Daniel Vetter Subject: Re: [PATCH 04/65] mm: Extract might_alloc() debug check Message-ID: <20201023141619.GC20115@casper.infradead.org> References: <20201021163242.1458885-1-daniel.vetter@ffwll.ch> <20201023122216.2373294-1-daniel.vetter@ffwll.ch> <20201023122216.2373294-4-daniel.vetter@ffwll.ch> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20201023122216.2373294-4-daniel.vetter@ffwll.ch> Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org On Fri, Oct 23, 2020 at 02:21:15PM +0200, Daniel Vetter wrote: > Note that unlike fs_reclaim_acquire/release gfpflags_allow_blocking > does not consult the PF_MEMALLOC flags. But there is no flag > equivalent for GFP_NOWAIT, hence this check can't go wrong due to > memalloc_no*_save/restore contexts. I have a patch series that adds memalloc_nowait_save/restore. https://lore.kernel.org/linux-mm/20200625113122.7540-7-willy@infradead.org/