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Shutemov" , Mike Kravetz , Michal Hocko , John Hubbard , linux-kernel@vger.kernel.org, Zi Yan Subject: [RFC PATCH 11/15] mm/page_reporting: report pages at section size instead of MAX_ORDER. Date: Thu, 5 Aug 2021 15:02:49 -0400 Message-Id: <20210805190253.2795604-12-zi.yan@sent.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210805190253.2795604-1-zi.yan@sent.com> References: <20210805190253.2795604-1-zi.yan@sent.com> Reply-To: Zi Yan MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 7C7C830025E3 Authentication-Results: imf03.hostedemail.com; dkim=pass header.d=sent.com header.s=fm1 header.b=Kp0Np0Hf; dkim=pass header.d=messagingengine.com header.s=fm3 header.b=cn0whdGO; dmarc=pass (policy=none) header.from=sent.com; spf=pass (imf03.hostedemail.com: domain of zi.yan@sent.com designates 66.111.4.26 as permitted sender) smtp.mailfrom=zi.yan@sent.com X-Stat-Signature: edxffd3npz7rhneprh7juneow7b51qtg X-HE-Tag: 1628190234-507474 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Zi Yan page_reporting_order was set to MAX_ORDER, which is always smaller than a memory section size. An upcoming change will make MAX_ORDER larger than a memory section size. Set page_reporting_order to PFN_SECTION_SHIFT to match existing size assumption. Signed-off-by: Zi Yan Cc: David Hildenbrand Cc: linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org --- mm/page_reporting.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/page_reporting.c b/mm/page_reporting.c index 382958eef8a9..dc4a2d699862 100644 --- a/mm/page_reporting.c +++ b/mm/page_reporting.c @@ -11,7 +11,8 @@ #include "page_reporting.h" #include "internal.h" =20 -unsigned int page_reporting_order =3D MAX_ORDER; +/* Set page_reporting_order at section size */ +unsigned int page_reporting_order =3D PFN_SECTION_SHIFT; module_param(page_reporting_order, uint, 0644); MODULE_PARM_DESC(page_reporting_order, "Set page reporting order"); =20 --=20 2.30.2