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[129.46.96.20]) by smtp.gmail.com with ESMTPSA id 5614622812f47-464bb59b66fsm7354528b6e.10.2026.03.02.03.17.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 02 Mar 2026 03:18:00 -0800 (PST) From: Yuvraj Sakshith To: akpm@linux-foundation.org, mst@redhat.com, david@kernel.org, jasowang@redhat.com, kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com Cc: linux-mm@kvack.org, virtualization@lists.linux.dev, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, 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 Subject: [PATCH v2 1/4] mm/page_reporting: add PAGE_REPORTING_ORDER_UNSPECIFIED Date: Mon, 2 Mar 2026 03:17:54 -0800 Message-Id: <20260302111757.2191056-2-yuvraj.sakshith@oss.qualcomm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260302111757.2191056-1-yuvraj.sakshith@oss.qualcomm.com> References: <20260302111757.2191056-1-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-Authority-Analysis: v=2.4 cv=GMMF0+NK c=1 sm=1 tr=0 ts=69a571ea cx=c_pps a=4ztaESFFfuz8Af0l9swBwA==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17 a=Yq5XynenixoA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=gowsoOTTUOVcmtlkKump:22 a=EUspDBNiAAAA:8 a=DkB-CqvKoiMeaEFB2csA:9 a=TPnrazJqx2CeVZ-ItzZ-:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzAyMDA5MyBTYWx0ZWRfX8MedoSYrbY6F CLwehz7V67EPjwJP0dUvaz438eZCqK2M53ipUNzj6nZU1V+IF/X6Jh3W1+hbsVJsPJE8st7VvnR dCw0upfl+sIGU2O+f4ckYj6lbPY+4XVclk9okHQCKQzs8Yt4ydSLmgZ44kzHlabMbIY0Ljt/Rrs dbdSclseoksTyFnyvJzCMfKdZeo9BGsQTeQpGg3QQoUUfGFHQnD5hZiT7T9lzt3w5ijTyzqKZFt waIoUx3MhSCnuy8b8OFicrQ1VuLfXFzCUhPj1hd30/2y0jVUx/R2SGuUQXQu4Hjk5xxT31mE5rA TxlyRYtfRYIM7Qk1p6+9T2FVLKfLBo60Sw1fy4bavWN1d8JVplYluyzM8RgsqHesNLdO75gaFAn a623H++/TPNXpCXDVJfTH8Dwwr4H5KizAc2hJXXFZ3Yx9ugym71hBQc8Lo0JM5icSjNKUtgYpJH ED/U9d4qFf02JFyDiTg== X-Proofpoint-GUID: rDYq01ccAyZYfD2PD7FVfIlL7JO0GTk9 X-Proofpoint-ORIG-GUID: rDYq01ccAyZYfD2PD7FVfIlL7JO0GTk9 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_03,2026-02-27_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 clxscore=1015 lowpriorityscore=0 spamscore=0 adultscore=0 priorityscore=1501 impostorscore=0 phishscore=0 malwarescore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2602130000 definitions=main-2603020093 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 --- include/linux/page_reporting.h | 1 + mm/page_reporting.c | 14 +++++--------- 2 files changed, 6 insertions(+), 9 deletions(-) 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..51cd88faf 100644 --- a/mm/page_reporting.c +++ b/mm/page_reporting.c @@ -12,7 +12,7 @@ #include "internal.h" =20 /* Initialize to an unsupported value */ -unsigned int page_reporting_order =3D -1; +unsigned int page_reporting_order =3D PAGE_REPORTING_ORDER_UNSPECIFIED; =20 static int page_order_update_notify(const char *val, const struct kernel_p= aram *kp) { @@ -25,12 +25,7 @@ static int page_order_update_notify(const char *val, con= st struct kernel_param * =20 static const struct kernel_param_ops page_reporting_param_ops =3D { .set =3D &page_order_update_notify, - /* - * For the get op, use param_get_int instead of param_get_uint. - * This is to make sure that when unset the initialized value of - * -1 is shown correctly - */ - .get =3D ¶m_get_int, + .get =3D ¶m_get_uint, }; 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[129.46.96.20]) by smtp.gmail.com with ESMTPSA id 5614622812f47-464bb59b66fsm7354528b6e.10.2026.03.02.03.18.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 02 Mar 2026 03:18:02 -0800 (PST) From: Yuvraj Sakshith To: akpm@linux-foundation.org, mst@redhat.com, david@kernel.org, jasowang@redhat.com, kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com Cc: linux-mm@kvack.org, virtualization@lists.linux.dev, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, 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 Subject: [PATCH v2 2/4] virtio_balloon: set unspecified page reporting order Date: Mon, 2 Mar 2026 03:17:55 -0800 Message-Id: <20260302111757.2191056-3-yuvraj.sakshith@oss.qualcomm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260302111757.2191056-1-yuvraj.sakshith@oss.qualcomm.com> References: <20260302111757.2191056-1-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-Authority-Analysis: v=2.4 cv=BI++bVQG c=1 sm=1 tr=0 ts=69a571ec cx=c_pps a=yymyAM/LQ7lj/HqAiIiKTw==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17 a=Yq5XynenixoA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=YMgV9FUhrdKAYTUUvYB2:22 a=EUspDBNiAAAA:8 a=Jvdq4yWlxvBRgq3Xg-wA:9 a=efpaJB4zofY2dbm2aIRb:22 X-Proofpoint-GUID: TlB9BxjRltVFQ6Q6MHyzLgGywk4OU4aw X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzAyMDA5MyBTYWx0ZWRfX8Vw4lw2YOCO6 btxBUWqiNOqw6Cu2c72avlu+ZRdu3SCSXNl30ZrtBruvEHZU0Z6mqUTDSKuY1W3+5Xb+HzZPcZX pFndH1ltIXlQ2fPUaN/TDlFNIkVQSvbuo1+NAAc7NE2A81jWAvFnS1Aq7WCqpE0X4qGA+sAV5KL H511+KQwt1lnWJi0qwXvN4YnXEXBOq7+untcJ5h3F0T8VL5wklBBawX7+3hHC4PCkGNWGQ++z0N PPs7jUU3G3OrCpfnzv/bYyGNq5xPU0qCerkoCZnyhHwqj2aBuXBdiRu1X3po9OmRRRGfBGaN4hW ZWO0IKJij8e0oANm9OYUsmLYaRCAT2jPe+y1LF29GXqD8pcLn8sbFNK91n4JjKG+AYwCdWo61P7 T6zOjmUcIR7/QzyyVHlOAidLlQCR7XFBeKGLzSB9keh4H7eZT082UJlNXagwFYh2NzrSu3ziCmw gVEA+i/2Pyp9dFTSn8g== X-Proofpoint-ORIG-GUID: TlB9BxjRltVFQ6Q6MHyzLgGywk4OU4aw 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_03,2026-02-27_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 clxscore=1015 lowpriorityscore=0 bulkscore=0 phishscore=0 spamscore=0 adultscore=0 impostorscore=0 priorityscore=1501 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2602130000 definitions=main-2603020093 Content-Type: text/plain; charset="utf-8" virtio_balloon page reporting order is set to MAX_PAGE_ORDER implicitly as vb->prdev.order is never initialised and is auto-set to zero. Explicitly mention usage of default page order by making use of PAGE_REPORTING_ORDER_UNSPECIFIED fallback value. Signed-off-by: Yuvraj Sakshith Acked-by: David Hildenbrand (Arm) --- drivers/virtio/virtio_balloon.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloo= n.c index 74fe59f5a..2dfe2bcd8 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -1044,6 +1044,8 @@ static int virtballoon_probe(struct virtio_device *vd= ev) goto out_unregister_oom; } =20 + vb->pr_dev_info.order =3D PAGE_REPORTING_ORDER_UNSPECIFIED; + /* * The default page reporting order is @pageblock_order, which * corresponds to 512MB in size on ARM64 when 64KB base page --=20 2.34.1 From nobody Thu Apr 9 12:08:33 2026 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CB970362128 for ; Mon, 2 Mar 2026 11:18:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; 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[129.46.96.20]) by smtp.gmail.com with ESMTPSA id 5614622812f47-464bb59b66fsm7354528b6e.10.2026.03.02.03.18.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 02 Mar 2026 03:18:04 -0800 (PST) From: Yuvraj Sakshith To: akpm@linux-foundation.org, mst@redhat.com, david@kernel.org, jasowang@redhat.com, kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com Cc: linux-mm@kvack.org, virtualization@lists.linux.dev, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, 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 Subject: [PATCH v2 3/4] hv_balloon: set unspecified page reporting order Date: Mon, 2 Mar 2026 03:17:56 -0800 Message-Id: <20260302111757.2191056-4-yuvraj.sakshith@oss.qualcomm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260302111757.2191056-1-yuvraj.sakshith@oss.qualcomm.com> References: <20260302111757.2191056-1-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-ORIG-GUID: QGN4Adaw2-FaDBP3uqD9K9RymmnwI9X4 X-Proofpoint-GUID: QGN4Adaw2-FaDBP3uqD9K9RymmnwI9X4 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzAyMDA5MyBTYWx0ZWRfX4leZGQiXikL0 EpZJsT0rpOIwSa28lFWfBQRVMKgEtCj7GVXmS4iZBY2julMIu83FHhpEAK0IPK7ERs3BPogNC1S 91Ab47W+/M0FXC+i1O/VPb7SaA0hc3b90/pO/c+5uM6S9jZDv4Nsc/vjIhAnyOYud743wfz/sHl a334dOaAWcOut3ulYbiZHQ1x7hzL4Mp0DL6CU9nXhxgAWTK+w0XJF+b9cF5cV6rpdHFaXvboS5V wj0RVX29HRj8g/5MGACrKHga4UZSlqOTV7LVrmhVjJb41tf+Y/agt9e1ThFWxFNecYLM+nA9pDx vB726e5bmeg3x5UGIhLLJnRx6ilUqJC0wiUaOUkHIKqwuPcA+mZ0J+RVDAd5G3xtOKqvEuhajgc 1hep6F5hVOGUncX3A/AqzIIcasyj3mial0O+f3Ynksswv+OR9D/gBQ482ms9iFzLYvYu14Cc5ek twbrcgm/4XmRdfSPmrQ== X-Authority-Analysis: v=2.4 cv=cLntc1eN c=1 sm=1 tr=0 ts=69a571ed cx=c_pps a=WJcna6AvsNCxL/DJwPP1KA==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17 a=Yq5XynenixoA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=ZpdpYltYx_vBUK5n70dp:22 a=EUspDBNiAAAA:8 a=yAl3Rinrq36N4FMOn3wA:9 a=_Y9Zt4tPzoBS9L09Snn2:22 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_03,2026-02-27_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 malwarescore=0 bulkscore=0 clxscore=1015 lowpriorityscore=0 impostorscore=0 phishscore=0 spamscore=0 suspectscore=0 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2602130000 definitions=main-2603020093 Content-Type: text/plain; charset="utf-8" Explicitly mention page reporting order to be set to default value using PAGE_REPORTING_ORDER_UNSPECIFIED fallback value. Signed-off-by: Yuvraj Sakshith Acked-by: David Hildenbrand (Arm) --- drivers/hv/hv_balloon.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c index 2b4080e51..09da68101 100644 --- a/drivers/hv/hv_balloon.c +++ b/drivers/hv/hv_balloon.c @@ -1663,7 +1663,7 @@ static void enable_page_reporting(void) * We let the page_reporting_order parameter decide the order * in the page_reporting code */ - dm_device.pr_dev_info.order =3D 0; + dm_device.pr_dev_info.order =3D PAGE_REPORTING_ORDER_UNSPECIFIED; ret =3D page_reporting_register(&dm_device.pr_dev_info); if (ret < 0) { dm_device.pr_dev_info.report =3D NULL; --=20 2.34.1 From nobody Thu Apr 9 12:08:33 2026 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A5EDC362153 for ; Mon, 2 Mar 2026 11:18:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; 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[129.46.96.20]) by smtp.gmail.com with ESMTPSA id 5614622812f47-464bb59b66fsm7354528b6e.10.2026.03.02.03.18.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 02 Mar 2026 03:18:06 -0800 (PST) From: Yuvraj Sakshith To: akpm@linux-foundation.org, mst@redhat.com, david@kernel.org, jasowang@redhat.com, kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com Cc: linux-mm@kvack.org, virtualization@lists.linux.dev, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, 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 Subject: [PATCH v2 4/4] mm/page_reporting: change PAGE_REPORTING_ORDER_UNSPECIFIED to -1 Date: Mon, 2 Mar 2026 03:17:57 -0800 Message-Id: <20260302111757.2191056-5-yuvraj.sakshith@oss.qualcomm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260302111757.2191056-1-yuvraj.sakshith@oss.qualcomm.com> References: <20260302111757.2191056-1-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-GUID: Q3PBCqZ14MUqOr5FiCjhsl51ga9LGlex X-Authority-Analysis: v=2.4 cv=Hol72kTS c=1 sm=1 tr=0 ts=69a571f0 cx=c_pps a=AKZTfHrQPB8q3CcvmcIuDA==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17 a=Yq5XynenixoA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=Um2Pa8k9VHT-vaBCBUpS:22 a=EUspDBNiAAAA:8 a=c6WgzpUFESAvjm-ZtrYA:9 a=pF_qn-MSjDawc0seGVz6:22 X-Proofpoint-ORIG-GUID: Q3PBCqZ14MUqOr5FiCjhsl51ga9LGlex X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzAyMDA5MyBTYWx0ZWRfX4Q6tM6qLREub mp+5s3xYCZNZ+GMxcxiiSnzc+8MoA4V3DQ556DjUSdgKGvVSQOFeUjw/dBhdoiaBeuo9H+dLF85 8+euDW/66b4xvKuBwqXLHtLipyGglQHOO/uXSh/ydJbszRdZAO1+qZcQ3mmOlK+4r6RCru2L2YL 0xyCK3oMucqcCX2Apq7kQFb8zYOzI802c+kDsNHb3SWcHX0EtGOroe5Km4mXK/4rvr7lZapTo3G mWQhT9lSZLIi17uQ+rkvnVM5ms/cNHSsRpkcv7rDdLTtfJm97+8AzkswKq4imos2Nh1aYKEoVd0 WTwLGCOv/9q/oqrP8tdmdlu82DQYQXRmTe5ZTVrtYJj+OapuNw/ZEXbRICYpOwAxqB7+1LwUEjp BgcEmawM6L3WjKHhEiW/RnjZamS7y+fVrsaNf7arr6yFyN0QcZy1iGdsE+W39PbEKKnZH1k/ado skJqpUoqrd3t36ekilw== 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_03,2026-02-27_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 impostorscore=0 malwarescore=0 adultscore=0 suspectscore=0 lowpriorityscore=0 phishscore=0 priorityscore=1501 bulkscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2602130000 definitions=main-2603020093 Content-Type: text/plain; charset="utf-8" PAGE_REPORTING_ORDER_UNSPECIFIED is now set to zero. This means, pages of order zero cannot be reported to a client/driver -- as zero is used to signal a fallback to MAX_PAGE_ORDER. Change PAGE_REPORTING_ORDER_UNSPECIFIED to (-1), so that zero can be used as a valid order with which pages can be reported. Signed-off-by: Yuvraj Sakshith --- include/linux/page_reporting.h | 2 +- mm/page_reporting.c | 7 ++++++- 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/include/linux/page_reporting.h b/include/linux/page_reporting.h index d1886c657..9d4ca5c21 100644 --- a/include/linux/page_reporting.h +++ b/include/linux/page_reporting.h @@ -7,7 +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 +#define PAGE_REPORTING_ORDER_UNSPECIFIED -1 =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 51cd88faf..21c11b75e 100644 --- a/mm/page_reporting.c +++ b/mm/page_reporting.c @@ -25,7 +25,12 @@ static int page_order_update_notify(const char *val, con= st struct kernel_param * =20 static const struct kernel_param_ops page_reporting_param_ops =3D { .set =3D &page_order_update_notify, - .get =3D ¶m_get_uint, + /* + * For the get op, use param_get_int instead of param_get_uint. + * This is to make sure that when unset the initialized value of + * -1 is shown correctly + */ + .get =3D ¶m_get_int, }; =20 module_param_cb(page_reporting_order, &page_reporting_param_ops, --=20 2.34.1