From nobody Thu Apr 9 13:33:10 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; arc=none smtp.client-ip=205.220.168.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772450294; cv=none; b=SJQWeYmcF9X/LNufq+8g78l4ZWKvt4nswuO6PaX6NZQfZVhvAubjoti7/+IqdbHyuvL6uEGvFTSpt0qwuDNyYKQA5+DOU4LMRI88Pi1r0vtqytVaaOLwfv3QvRFs5ZnN6+xgbqk3HcJ1cKqeiFVPCnCR1mvAyl7pzaWdrNa2w7I= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772450294; c=relaxed/simple; bh=HLXtTAzPnUYaOa2u23iqxrz4snTgAGJKoQDn5bKXMek=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=Pod4ktXAsvzX1HOVVJBX63eX0gfX2EbZZSe8/Q3vxDlcBC45dKYbHh8sZM3tpXf7p60RcBeqJk7jHE8vKBhXHR42u29nhZ8LqYtPtGWUeDqe4GOlTnpgVG06e+oN9iV1tl+bBVHWjOoYYN8wVzbNlpu7pq7Re7VJB/7Q9wyWRAQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com; spf=pass smtp.mailfrom=oss.qualcomm.com; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b=e7dupRXg; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b=C3pxzszh; arc=none smtp.client-ip=205.220.168.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b="e7dupRXg"; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b="C3pxzszh" Received: from pps.filterd (m0279865.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 62288Qe63223966 for ; Mon, 2 Mar 2026 11:18:08 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=qualcomm.com; h= cc:content-transfer-encoding:date:from:in-reply-to:message-id :mime-version:references:subject:to; s=qcppdkim1; bh=9SaV6NeFszm MR6mTHDZ6hjb5x1BYzXavRsIhe+Tko7A=; b=e7dupRXgFjWwN5RgK14fr25qfiE ViK+0pp8NQ9Biv6jQfqP03nbbdCBZ23zvXjZZhkSR4P9uuO48s6zwScjChTDoVqN cMvhLgEAXeZJE1335THfZvZr9Ic2qSLVrn0RUtuY6CJPhzf1kXzypUmxtVWZy7s6 Z3Wf1Bxn/rmgK5d08iU//gLwYHSspodfSQeNQv4NC6ruBmIWeKicTQhXMWzNfWoz DhfL87Qiiha++Ya4rGDPV3tJW4E+7HrBDSWa6jdr+Yz/fhAg9hjonXDjpkXXZeXc esfCSegwQCW3rwELNNkw1Hz04rl1NXOBZ1UqDgpRG+Rh6hbG6A/BguFy7Qg== Received: from mail-oi1-f200.google.com (mail-oi1-f200.google.com [209.85.167.200]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 4cn0b1hweu-1 (version=TLSv1.3 cipher=TLS_AES_128_GCM_SHA256 bits=128 verify=NOT) for ; Mon, 02 Mar 2026 11:18:07 +0000 (GMT) Received: by mail-oi1-f200.google.com with SMTP id 5614622812f47-45f0b597f04so53136415b6e.1 for ; Mon, 02 Mar 2026 03:18:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oss.qualcomm.com; s=google; t=1772450287; x=1773055087; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=9SaV6NeFszmMR6mTHDZ6hjb5x1BYzXavRsIhe+Tko7A=; b=C3pxzszhV7oSAqZUx4oU9jlEIO07+FvwZkCNiXSON7naYnYSZ8g0ZCAVpDFEell0L/ c0QWim/enqnW6KAXGiheZnqxtVnvZ9Wn3x9RxFSsO65bR4IcSOq5omn5XkQnZOIX+P2+ WmQxzJbzykiAZuoAPrDq91aYgYhiXjd/GJmSoorqZM0UTUGxnF2ybRDUKoxMF7o0HieJ 7j8p1/xEsZV524Ks8fupQDWCLCQZCsna05tNFVTB82LWmtPohZDiC9tyFMMq7SHLeQCP P8ar9XaK+MJpEif3HHTWqIA6sDb1BeHVsteiVxfcxXuRJn6gqjyu5K9dzOs5VHV1QSNb XVoA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1772450287; x=1773055087; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=9SaV6NeFszmMR6mTHDZ6hjb5x1BYzXavRsIhe+Tko7A=; b=Fn5bDA/IG8etweFNoAn6u/ZtBRKrUhN5LIOsii6TKMBNte65iNQ9eCtvVE5wRbkFi8 if0v2EVbwhyWV3tlHx/CxdqoZDGMyTILllszRbdkNfCau8XfOPf3Cc6VjMgPlXD92uKf sOYXKEXRIO4s+C4N8zuOzw9jSqQuToI2tDYEP9LLzo9hg69y8X4qlHvBFY/BRb9FbKjv PBf1qHy2gk6zSpuO5ra4EFjSl7nG38r8sz4wvLXdIZBE9EjC7Ba8dp9+RZ2voZqVYwiu USTwCLgcB3k9lz8SveGMgykvcWCOhxYAXtGxzFRhcQHtUrgC95nVxWb1dvtfLdw08aal TuGA== X-Forwarded-Encrypted: i=1; AJvYcCU4b5z6NFAdgMVQ8AlPOWpFTR6Yl+XZJX0nWZmwhG3Bx+XzPLYoVC41kyZxPHnzwWrASATlb+7WnA9dLXw=@vger.kernel.org X-Gm-Message-State: AOJu0Yw/xcBpXMbXG5z0ld7wvDnwkYkuS7izM9Gf0qa6G3wS6UK8YV5G jbRxfl0RffiuEyKiLF1HsQTt7Dso6uGWqLa2zqGfbFLtdbunh1vyq12y5vq0YW9pstBbIxMzzji b0Sem9bqjkG0B0ez1Xwt5+skfUkkFrVDykHkgabJv7Lznn31F2UnvZaKRhSFmJ6M3pb4= X-Gm-Gg: ATEYQzxQ4ul2JVgSgItrBI0Q9XtcVy13Z2AEz2SOQ3tZFDeZUmqR9wJH6NJNbBfHjG1 kunhOz35gpnvT93sAHxWl82tHrNGU0YZzbfFVImL+XLLYTfscz/LsqPp46wW81qsvtkvtTPTdwq QSn380IBYfIbxAAeBNefT0dWsTmqy2NnJk5FRz/XhcG5TIKBGb6nuOi141qbYCrN7RVDfnXuVyl KYJYqLZJBf2RaEGHo9+h3i2BqkqYwOsowigZeixpm9yv4sChZZe7I+HRNZ4hp4Gkb4CSATH6+Xc XMrs5F+mdHmXHxRbGThoW6Kmjy8FqwqghkjNDZOf+XXI2LMecFelohTIG+bEjoGBXFSX0yJkqL4 G1WW7+cGJ8vqq8r4xoSFmZOOV4IXJGRSCKYKhE6Lqs0z/xTrHAFGQPJ9ELuMXtC+/5/N308vcPJ 4a3d3W X-Received: by 2002:a05:6808:1a29:b0:463:a32f:ed4b with SMTP id 5614622812f47-464be9c74e5mr5728076b6e.22.1772450287160; Mon, 02 Mar 2026 03:18:07 -0800 (PST) X-Received: by 2002:a05:6808:1a29:b0:463:a32f:ed4b with SMTP id 5614622812f47-464be9c74e5mr5728038b6e.22.1772450286733; Mon, 02 Mar 2026 03:18:06 -0800 (PST) Received: from hu-ysakshit-lv.qualcomm.com (Global_NAT1.qualcomm.com. [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