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[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) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000005, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: > 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.=