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[71.184.117.43]) by smtp.gmail.com with ESMTPSA id p199sm5506182qke.18.2019.09.30.04.22.23 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 30 Sep 2019 04:22:23 -0700 (PDT) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable From: Qian Cai Mime-Version: 1.0 (1.0) Subject: Re: [PATCH] mm/page_alloc: fix a crash in free_pages_prepare() Date: Mon, 30 Sep 2019 07:22:23 -0400 Message-Id: References: <20190930110434.5k47w7xfvkjcohkp@box> Cc: akpm@linux-foundation.org, heiko.carstens@de.ibm.com, gor@linux.ibm.com, borntraeger@de.ibm.com, linux-s390@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org In-Reply-To: <20190930110434.5k47w7xfvkjcohkp@box> To: "Kirill A. Shutemov" X-Mailer: iPhone Mail (17A844) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000212, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: > On Sep 30, 2019, at 7:04 AM, Kirill A. Shutemov wro= te: >=20 > Looks like Power also uses the hook. Have you check that this patch will > not affect Power? Yes, I did. Although I did only test radix memory which seems just return im= mediately in arch_free_page(), I code-review the non-radix memory path and d= id not find anything suspicious. However, if really needed, I could test has= h memory config or adding powerpc developers to double-check.=