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[129.46.96.20]) by smtp.gmail.com with ESMTPSA id 46e09a7af769-7d59785d8d5sm9311790a34.17.2026.03.03.03.30.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 Mar 2026 03:30:36 -0800 (PST) From: Yuvraj Sakshith To: mst@redhat.com, david@kernel.org Cc: kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, longli@microsoft.com, jasowang@redhat.com, xuanzhuo@linux.alibaba.com, eperezma@redhat.com, akpm@linux-foundation.org, lorenzo.stoakes@oracle.com, Liam.Howlett@oracle.com, vbabka@suse.cz, rppt@kernel.org, surenb@google.com, mhocko@suse.com, jackmanb@google.com, hannes@cmpxchg.org, ziy@nvidia.com, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux.dev, linux-mm@kvack.org Subject: [PATCH v4 1/5] mm/page_reporting: add PAGE_REPORTING_ORDER_UNSPECIFIED Date: Tue, 3 Mar 2026 03:30:28 -0800 Message-Id: <20260303113032.3008371-2-yuvraj.sakshith@oss.qualcomm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260303113032.3008371-1-yuvraj.sakshith@oss.qualcomm.com> References: <20260303113032.3008371-1-yuvraj.sakshith@oss.qualcomm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzAzMDA4OSBTYWx0ZWRfX/FCtTxr/icfQ NRs0/95FZZrgaLBNvpex08iiBDkq6LY4m/DT+jkfQDYvYt6SR3y72l8cANui+e0BXDl28ie6JNN IUlc4axn8P8t5rS5EYZDKJDZpwe4Qg9QrkPXp8GxjTNO2KKYrMG3mTUWgV3mIoG6Cz/WifsCozF NKsPd3hyJD4/+wqHQJ9BC+vQEI7r4o8LYHXoQZxzER9QG4nznlXJ6dLk9ovccBcgLr3YdL1pnXu dJEn8nxpyPLvVMAWXTXB8sV666P/fBGF8NFYcbUMyrDlf3LGhHJL/JlpVG6TWDTsK6GAesO1i73 waXKbovFYSD7LkJOIp2++9MsozBFYLf58HoNoa1+CVLGw2+GUTL36sAHlc2xZNr4vBTj95FMxuA 5rKrJlMlE8WB+pWP+ex15gjGOxYGlLx34CUROv7K/vQSo0MoukIHl/hEh4O92VFbyjWQeVKgjgv 3JGFK14Jaz/4RRmWQ2w== X-Proofpoint-ORIG-GUID: kOR55jekdg5pwPIf6AQ_TleXSWsSlFya X-Authority-Analysis: v=2.4 cv=S+HUAYsP c=1 sm=1 tr=0 ts=69a6c65d cx=c_pps a=+3WqYijBVYhDct2f5Fivkw==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17 a=Yq5XynenixoA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=3WHJM1ZQz_JShphwDgj5:22 a=EUspDBNiAAAA:8 a=agIWOxjPXKrzBStnBTYA:9 a=eYe2g0i6gJ5uXG_o6N4q:22 X-Proofpoint-GUID: kOR55jekdg5pwPIf6AQ_TleXSWsSlFya X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-03-02_05,2026-03-03_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 malwarescore=0 lowpriorityscore=0 bulkscore=0 suspectscore=0 clxscore=1015 spamscore=0 priorityscore=1501 adultscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2602130000 definitions=main-2603030089 Content-Type: text/plain; charset="utf-8" Drivers can pass order of pages to be reported while registering itself. Today, this is a magic number, 0. Label this with PAGE_REPORTING_ORDER_UNSPECIFIED and check for it when the driver is being registered. This macro will be used in relevant drivers next. Signed-off-by: Yuvraj Sakshith Acked-by: David Hildenbrand (Arm) --- include/linux/page_reporting.h | 1 + mm/page_reporting.c | 3 ++- 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/include/linux/page_reporting.h b/include/linux/page_reporting.h index fe648dfa3..d1886c657 100644 --- a/include/linux/page_reporting.h +++ b/include/linux/page_reporting.h @@ -7,6 +7,7 @@ =20 /* This value should always be a power of 2, see page_reporting_cycle() */ #define PAGE_REPORTING_CAPACITY 32 +#define PAGE_REPORTING_ORDER_UNSPECIFIED 0 =20 struct page_reporting_dev_info { /* function that alters pages to make them "reported" */ diff --git a/mm/page_reporting.c b/mm/page_reporting.c index e4c428e61..a97ee07cb 100644 --- a/mm/page_reporting.c +++ b/mm/page_reporting.c @@ -370,7 +370,8 @@ int page_reporting_register(struct page_reporting_dev_i= nfo *prdev) */ =20 if (page_reporting_order =3D=3D -1) { - if (prdev->order > 0 && prdev->order <=3D MAX_PAGE_ORDER) + if (prdev->order !=3D PAGE_REPORTING_ORDER_UNSPECIFIED && + prdev->order <=3D MAX_PAGE_ORDER) page_reporting_order =3D prdev->order; else page_reporting_order =3D pageblock_order; --=20 2.34.1