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[129.46.96.20]) by smtp.gmail.com with ESMTPSA id 46e09a7af769-7d5866269a8sm4324502a34.13.2026.02.27.06.07.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 27 Feb 2026 06:07:01 -0800 (PST) From: Yuvraj Sakshith To: akpm@linux-foundation.org Cc: mst@redhat.com, david@kernel.org, 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, 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, virtualization@lists.linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH v1 1/4] page_reporting: add PAGE_REPORTING_DEFAULT_ORDER Date: Fri, 27 Feb 2026 06:06:52 -0800 Message-Id: <20260227140655.360696-2-yuvraj.sakshith@oss.qualcomm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260227140655.360696-1-yuvraj.sakshith@oss.qualcomm.com> References: <20260227140655.360696-1-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: AW1haW4tMjYwMjI3MDEyNSBTYWx0ZWRfXxRkgNEW9Yq+j +zwTjnRfRj1I5IhUZ7fztD6JUZnRE3djxXCCd7cI2qnGDibYCtgg/KqDSbe9+llsdgkfNbRU0rN i428Pcho6qmJuclMHGmEcN3C+PqmZNMoORDfDNGdv3AbgRJ4AC4kjevhh0kdkmesXgtmhcuGebF mxq3A2NY4Pqw4C6TB5ls4xYfFzpd6UkUXVZFwoohyHzPMp9LXRNEGylRUCpHr+VABbIdZdFlY7Y b2cLXSOK1cjTtu7sGhHtYM9ULqKwLDgaRzaJsOBEnLCMzRqdbXzgbKQ3np1ualgLhPDNHDdW034 CSggVJOsRF4apPSarQIFjdqIRved559xEurZP+C0UyRpvzl6uHycVWtOsjCGXTpZlAB2ApaPtZW XKsxlBphvxcT22a8+Y9bhsIi9vNPA1pggU8gQmc7pRLeZcILE5AuHMq7CbUaJgguTSSoW0X6pp6 zltBLY5HIcm7zX3HiTA== X-Proofpoint-GUID: 7Bx1-ajiED0ul-CtoqIIyq0UdUxcA5Kh X-Authority-Analysis: v=2.4 cv=bIsb4f+Z c=1 sm=1 tr=0 ts=69a1a507 cx=c_pps a=z9lCQkyTxNhZyzAvolXo/A==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17 a=HzLeVaNsDn8A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=gowsoOTTUOVcmtlkKump:22 a=EUspDBNiAAAA:8 a=agIWOxjPXKrzBStnBTYA:9 a=EyFUmsFV_t8cxB2kMr4A:22 X-Proofpoint-ORIG-GUID: 7Bx1-ajiED0ul-CtoqIIyq0UdUxcA5Kh 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=2026-02-27_02,2026-02-27_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 spamscore=0 phishscore=0 impostorscore=0 suspectscore=0 malwarescore=0 bulkscore=0 clxscore=1015 priorityscore=1501 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2602130000 definitions=main-2602270125 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_DEFAULT_ORDER and check for it when the driver is being registered. 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..a7e3e30f2 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_DEFAULT_ORDER 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..9ad4fc3f8 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_DEFAULT_ORDER && + prdev->order <=3D MAX_PAGE_ORDER) page_reporting_order =3D prdev->order; else page_reporting_order =3D pageblock_order; --=20 2.34.1