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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> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-GUID: _1ck3va-rGfXf0GhXEjdWOsH-rDAolb7 X-Authority-Analysis: v=2.4 cv=GIUF0+NK c=1 sm=1 tr=0 ts=69a6c65d cx=c_pps a=OI0sxtj7PyCX9F1bxD/puw==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17 a=Yq5XynenixoA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=yOCtJkima9RkubShWh1s:22 a=EUspDBNiAAAA:8 a=agIWOxjPXKrzBStnBTYA:9 a=Z1Yy7GAxqfX1iEi80vsk:22 X-Proofpoint-ORIG-GUID: _1ck3va-rGfXf0GhXEjdWOsH-rDAolb7 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzAzMDA4OSBTYWx0ZWRfXw3E8rmi+V9kp xfSe+I7FO4wRKEe8sZl8n7l5dPftgi/6k+h6PuSgUiKwZNVNWFkihZHVxpzy246NfVpBxcy04m8 0VxtQee+KmKrOrivAFnWuGA8kMWdL4XmNrcyln6mHHRVYV32zmQWBRJMxDtXrct5TxqPGyjtnm/ Z2EjkKLDx61iDumb5U4QN9wHZJOnPwkDkX4tBRuTDx0VjlKZYjO4VhZprPmWoanD9x0QK8zOudy /DU5cQQf+u5BbQdGdSue/F/ILJsn1aivQexiVVibEzzMvViD77oDw3v09FnEXrDQGT2pZbO1Dgt pxYJopATe5W/w7DiW6fIiwleYwOWrjTDNdtsLgBUyiUXyvAasNuhHfNYV83MtqR9Bb6Lj7H+vqm ERuNA9cJ3bl/+2huGttmo3eHDbk9EgiQCpUtbp78xtnel8/G0lcfPAtAz+C85dXxC+4rLjOC4I2 g15n1yFl0YgVUbumeOA== 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 bulkscore=0 impostorscore=0 priorityscore=1501 clxscore=1015 malwarescore=0 suspectscore=0 spamscore=0 phishscore=0 lowpriorityscore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2602130000 definitions=main-2603030089 X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 2B52DC0010 X-Stat-Signature: 6z1mqx7kpndktuskwrdbte4zoiz4maub X-Rspam-User: X-HE-Tag: 1772537438-904112 X-HE-Meta: U2FsdGVkX19RAKjLy2u8IrF6eHDwnejC09XauY+GXXbFkobhOdLsmfrEd7NrwJM0ufjsyORqa50tP6qCCtYBpr8il7JLtt9a1IQKaBm5db9OPh3l2gkeGBYgVpnP6/ePNjvkw1GH98ywqEPaAKy7nGlGpISq9F+0jXp6BhzL28AInML+/Lru2qoqSx7yGGJ66MxkbfotSdzH3X7Mms6nEkfWkx7XDoNitfpFxhkWhd+BrTHycplSeg9NHeDqu4BKsm/4n0dUCrihzIrhWkR/tnLsTQmybfMEE5nGczPSZWrqVl9CxhLTZMqnCTRxiUWcaWGewMXVDuO6zTjiy/yY17txxduLxwzZ0ubWXXW5L7QErnhH7djrX7IAC2pq/QELBreE0x4WULMkWJMpLFFoAjeNt03U3d2kd3co8OX++D8G1B3EVHVXF/XJF4wiCM47yZev17uvWgF4mUmdGhnCUPB9xTrwWZbdtGTuW4KvffvbzT8eiYmPuIBdYDUaOtwxYr3puwZyEVoLcndd6V7GP4T/nBsuQaIgt3iGAzpaMH6WQExVuhSCbJVwPLHZiARvacjKsaLSPrNDJRo9tVRjSIzHemuoVWmJC6ZRWAdLJldFuJcpHZRVkM++Dw9MIIssBnQImqMPDc4hHKtWgtkIF/vYUw3C5V+mOCkyqbr5RiYraPnPImXKIv+Zb0ibUakQ4UIbQQa3qUHkthJGF938s6pKrHlAQGJ9oplpyVr2GTrIo9T4+I9WXNb9nl5bc6QgRsE66WVy3lnGfRFxRG1g3AIMtdhHO7os+uhV47A+hjwpD2NK5VlhWkCQ5/LLjMadQFhX/e67un0sud8jAEGE031oDlOlKe++0T7ulDYwsAagHZnDq1WpdRFAqNRHUo2J/OamWm17tLQmW2y/TrbuOqUAToUMQPWVx2rGgMBpYUJHdc27yfwZ2TFD1x2aIJTZ02BrYwU6tzY3scf9u2+ 65wT7IYN 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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 --- 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 @@ /* This value should always be a power of 2, see page_reporting_cycle() */ #define PAGE_REPORTING_CAPACITY 32 +#define PAGE_REPORTING_ORDER_UNSPECIFIED 0 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_info *prdev) */ if (page_reporting_order == -1) { - if (prdev->order > 0 && prdev->order <= MAX_PAGE_ORDER) + if (prdev->order != PAGE_REPORTING_ORDER_UNSPECIFIED && + prdev->order <= MAX_PAGE_ORDER) page_reporting_order = prdev->order; else page_reporting_order = pageblock_order; -- 2.34.1