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=-0.9 required=3.0 tests=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 3178CC33CB2 for ; Wed, 15 Jan 2020 12:35:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F282724679 for ; Wed, 15 Jan 2020 12:35:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lca.pw header.i=@lca.pw header.b="bB1RWKWZ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726559AbgAOMft (ORCPT ); Wed, 15 Jan 2020 07:35:49 -0500 Received: from mail-qk1-f180.google.com ([209.85.222.180]:38441 "EHLO mail-qk1-f180.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726071AbgAOMfs (ORCPT ); Wed, 15 Jan 2020 07:35:48 -0500 Received: by mail-qk1-f180.google.com with SMTP id k6so15433016qki.5 for ; Wed, 15 Jan 2020 04:35:48 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=lca.pw; s=google; h=content-transfer-encoding:from:mime-version:subject:date:message-id :references:cc:in-reply-to:to; bh=iqApvHFhN/2y0vIYJ3VQfDet+rTcg9cDecADYiR5JVU=; b=bB1RWKWZMEneVE4Y5JXxfIQj3cSUOnG4agG6xpED5c78v4My2ZxnFoZ+WMxAPgslhd JVkMISZNbybG0bX8TNxmJnMSvWApNKd2Id/EBLco2/Ii+GOIdOpZhVzYtKmFc93NfJD1 2f5AmgsPm3oaoWeBThw5rqLj/u/Fu6zwfnozi7Z+jKjrEYPwL791CQwdvJVmXjPTTU3I tSiklFVWzEngTJBXW+8U6MajiNRAmD9xBRvAVLxMV8/WAImaXih3uvL5Ax19Gtps0v71 lHk3NKCQrtaZ8HNOV4ZuobUrtMG07l4Tggue9V0/M2GMeQNl38KLUjipG38Hu11bSQ1r 2eDw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:content-transfer-encoding:from:mime-version :subject:date:message-id:references:cc:in-reply-to:to; bh=iqApvHFhN/2y0vIYJ3VQfDet+rTcg9cDecADYiR5JVU=; b=qJfflfXkmBnoE2osgMIX2r1A6vN4R0dlr8vEoE3LCZBNpxCOzQDaZyhjfY9n82dVLq Ww9HXGzLS3TR7WNtmzosgtrLMIE90FCmjLUdZAjMDw5V1vK07x6OpBJz2YvDiw3nfGq5 qvQi3TrAtMGe+XgOeZhJqgGpv9dbEsWTkhp378xnFuK444tDDGCNKenezq5G3cMDbAgZ u2mboNITRSC0omgN822bSJsHnvL0ze5hnARLYg46DFsy6z61+ZiVC6kANu/kStoMkVuS 4KA8ap51snJRHAbrAkCKKHKJyk8i0a52TcXYVsUAENMpbbZbtCocP5dYG/9S3SEPJ+N7 E+8w== X-Gm-Message-State: APjAAAUWMnH5saHqmZOBaf1reCTIjugcyK58ETPg/nQyZLOdmwKJTO7R Gm38go9LfKxcnb9LKzkFTcGgkdOeJWU8/A== X-Google-Smtp-Source: APXvYqwAXI2OjM9Fg8agJQyfEn0+0DpAuXhCeo2L0sBGBb7M/5mZE/BcGtIoBElTJBWIyL7ZPBan3w== X-Received: by 2002:a05:620a:3cf:: with SMTP id r15mr27565236qkm.12.1579091747280; Wed, 15 Jan 2020 04:35:47 -0800 (PST) Received: from [192.168.1.183] (pool-71-184-117-43.bstnma.fios.verizon.net. [71.184.117.43]) by smtp.gmail.com with ESMTPSA id q131sm8414276qke.1.2020.01.15.04.35.45 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 15 Jan 2020 04:35:46 -0800 (PST) Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable From: Qian Cai Mime-Version: 1.0 (1.0) Subject: Re: [PATCH -next v2] mm/hotplug: silence a lockdep splat with printk() Date: Wed, 15 Jan 2020 07:35:45 -0500 Message-Id: <39D75B58-A5CE-4837-BCD3-8026E2C88861@lca.pw> References: <20200115092221.GX19428@dhcp22.suse.cz> Cc: akpm@linux-foundation.org, sergey.senozhatsky.work@gmail.com, pmladek@suse.com, rostedt@goodmis.org, peterz@infradead.org, david@redhat.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Mike Kravetz In-Reply-To: <20200115092221.GX19428@dhcp22.suse.cz> To: Michal Hocko X-Mailer: iPhone Mail (17C54) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > On Jan 15, 2020, at 4:22 AM, Michal Hocko wrote: >=20 > Is this correct? CMA pages cannot be comound? I never saw a CMA page also a compound page. Also, in alloc_contig_range(), i= t calls migrate_pages()=E2=80=94> unmap_and_move_huge_page() which will free= the old huge page, so I think that will clear pageCompound. Cc Mike in case I miss anything.=