From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=148.163.156.1 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793357110; b=D/sH+LYdGp+7uIKLcqI+4+0d7Er3u+rxcaWHJOyAtH73eTe6iKqDXg81K7JRIBoNps5X WujA/xvGkxWAphT5KOvpMTnyIap1ATh+RCrMFESUbYJPlxX2MwxD2mqNRyeFtBCHKfJ8l WybxUJHsiis7PrxR50yYIZ8uV5pR6O1BKwDKloN8jil53h57s4y4LJsN/QrBNIvlQapEj umIa2UXlylYNthrugiVD5IVH8X7kZfl4RG9rKlR+CwpfBNYN6h7vWjusN1V1rrxoF6t9n 81esSGV2ITE5yzAtH+AjBwnjk9EHHgjqEB59UgNdnZXFL+Ta6FWc1OrLa48CNSELGhQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793357110; h=DMARC-Filter:Received:DKIM-Signature:Received:Received:Received: Received:Received:Received:Received:From:To:Cc:Subject:Date: Message-ID:X-Mailer:In-Reply-To:References:MIME-Version:Content-Type: Content-Transfer-Encoding:X-TM-AS-GCONF:X-Proofpoint-Reinject: X-Proofpoint-GUID:X-Proofpoint-Spam-Details-Enc: X-Proofpoint-Spam-Info:X-Authority-Analysis:X-Proofpoint-ORIG-GUID: X-Proofpoint-Virus-Version:X-Proofpoint-Spam-Details; bh=+c1ihJ1Xln4zEcrREqgDAfDTBrnVULNOnFAexlBeung=; b=kc2IT7ZMgGi7tg4sN8eD4fhYnHmUkM3D4MItUp+Y25NzwjaB0muBf8oEnPEeO3IxgbqU Z2ii1kA53XuXiUEqySNKoQhulS8F8vqiXXiB+0xJ/oN2NFVyIqfdWrao5T1ZOOjMO8yRK IdRkAM6qVYbFUn4ErVT86PB/m+mG7k5zIPrhDNlrC/tTSbIspLlwY70DpDZdRtP1+0wAK mvexS0D3EgNZA49AQ0+Ic7gHxeKpVMn8IPKAL3V9IgZOQcB1AcerGDkVghe0Te/4L0dgs 9jLW+LNdhH5ovBKUE8cJ71ltHbHn8k/CIb+4qZK6ecZnjhbr5z7FYtRU40qW2ZUtXnw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=linux.ibm.com; spf=pass smtp.mailfrom=linux.ibm.com; dkim=pass header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=dss6POhi; arc=none smtp.remote-ip=148.163.156.1 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 885A960A3802; Fri, 30 Oct 2026 10:45:09 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 885A960A3802 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=dss6POhi Received: from pps.filterd (m0356517.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 69U8ET8p2376743; Fri, 30 Oct 2026 10:44:24 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc :content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=pp1; bh=+c1ihJ 1Xln4zEcrREqgDAfDTBrnVULNOnFAexlBeung=; b=dss6POhisLc8cfJCKTifeh e+zeaNYuHH/S+VNxv02rsfOpAAnPd4o3EXWVOgIGXK9wUtudQiLRLunlWU3HQbEF S+RaUFDI4QzfXTaudAzQsGpG3ulq9R05Lr8IiUi53XbtCC5IhlRkLd02Jj3UHjEf 4BqxYQLvkunC4NMK6BIf1xCGsuPlWAxHVvfNCoeq3IP9B8Dmu/h2XQgk+MADFPuJ SX4qeCc3Gn40ncO7VNprWTsvmwMinfoZaD0Fdjb+T6w4q+QwsicEEUW9BDNaVvkf OJwxYVInsMUKK8S2FTdTdK29t27jsAs5n/zYE/1G643+3AszcO47WJxIxHRkWXVw == Received: from ppma12.dal12v.mail.ibm.com (dc.9e.1632.ip4.static.sl-reverse.com [50.22.158.220]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 4hmeay29j6-1 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Fri, 30 Oct 2026 10:44:23 +0000 (GMT) Received: from pps.filterd (ppma12.dal12v.mail.ibm.com [127.0.0.1]) by ppma12.dal12v.mail.ibm.com (8.18.1.11/8.18.1.11) with ESMTP id 69U8Jvbq238919; Fri, 30 Oct 2026 10:44:22 GMT Received: from smtprelay06.fra02v.mail.ibm.com ([9.218.2.230]) by ppma12.dal12v.mail.ibm.com (PPS) with ESMTPS id 4hm69e47b2-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 30 Oct 2026 10:44:22 +0000 (GMT) Received: from smtpav01.fra02v.mail.ibm.com (smtpav01.fra02v.mail.ibm.com [10.20.54.100]) by smtprelay06.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 69UAiJoN44892546 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 30 Oct 2026 10:44:19 GMT Received: from smtpav01.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0651320040; Fri, 30 Oct 2026 10:44:19 +0000 (GMT) Received: from smtpav01.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4028220043; Fri, 30 Oct 2026 10:44:13 +0000 (GMT) Received: from li-49acbccc-2994-11b2-a85c-d51b89e344f1.ibm.com.com (unknown [9.43.39.23]) by smtpav01.fra02v.mail.ibm.com (Postfix) with ESMTP; Fri, 30 Oct 2026 10:44:13 +0000 (GMT) From: Pavithra To: songmuchun@bytedance.com Cc: akpm@linux-foundation.org, chleroy@kernel.org, corbet@lwn.net, david@kernel.org, lance.yang@linux.dev, liam@infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, ljs@kernel.org, maddy@linux.ibm.com, mhocko@suse.com, mpe@ellerman.id.au, muchun.song@linux.dev, npiggin@gmail.com, osalvador@suse.de, qi.zheng@linux.dev, rdunlap@infradead.org, ritesh.list@gmail.com, rppt@kernel.org, skhan@linuxfoundation.org, sshegde@linux.ibm.com, surenb@google.com, pavrampu@linux.ibm.com, vbabka@kernel.org Subject: Re: [PATCH 0/4] mm: Enforce read-only shared vmemmap tail mappings Date: Fri, 30 Oct 2026 16:14:10 +0530 Message-ID: <20261030104410.417740-1-pavrampu@linux.ibm.com> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261019090830.1917657-1-songmuchun@bytedance.com> References: <20261019090830.1917657-1-songmuchun@bytedance.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Proofpoint-GUID: Cq-D5FMcULtYQJqPtFBU-Ss_evhba_3I X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDMwMDA0MiBTYWx0ZWRfXyG+fs1ghDdeu MufdeAtSObpnKs0XjFFcDX2NqGMGt7MHQXUNybXyz53Fpx5amXAtuMm34jTk75sa+4qr1stjkxL W4mTEW2Wg+tKYnjBZPaniDSxElpoM6rAiJnRlo+5BEcOeBlWQmiSqtSkWZg/0RqOhdewZE5nCHS 7F4GF6CU7dxnmGk6bXQZHzXUjhtxmPB8nhEizRkNqNRacXRUjHfBtpcS3vHNNqhbNQdbb2k6SyP 4iWd5KSjzbKBagjm3VDXKfdYWa6BxZ71PxnqFHfPoO3orZam21OnNKnNL1mznBWbHnLEZR5yiAF nDT181Dq8h0ROzEuGXqsq3AAvYUh50njhXSMNxxLZu3pfolJkFLeftBVau3zEFP28NqImjRMB5V GyfgLl3sU7eiZvH4nBoBbVhnvQrP9SSBSXEWVfNTwXvjlfqm88/iv3UwT9mdRlxXt22gSpz+Htf OPlw6g22K/JelFWbJxQ== X-Proofpoint-Spam-Info: AW1haW4tMjYxMDMwMDA0MiBTYWx0ZWRfX5dC/lVTICYYG PJrbr8wpoREtd2C2ydh3d2GuaJgASQ9dZh5g7ZaHXI4cuQzosbh6FtReDhmycaMxMNbqAdhNIgz Meh5Gf3IkxQBnIaTiPevwSoYHYeShng= X-Authority-Analysis: v=2.4 cv=QbjzLcbv c=1 sm=1 tr=0 ts=6ae47508 cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=660iZSQnnn4A:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=U7nrCbtTmkRpXpFmAIza:22 a=Uv9NjG45AAAA:20 a=VnNF1IyMAAAA:8 a=8zS9G5xvJLahJeJr1kgA:9 a=zgiPjhLxNE0A:10 a=bA3UWDv6hWIuX7UZL3qL:22 X-Proofpoint-ORIG-GUID: 8kHx2nZ45Fplgz9D0Wt0xILKkBxGZrzM X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.138,FMLib:17.12.100.49 definitions=2026-10-30_03,2026-10-21_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 impostorscore=0 phishscore=0 adultscore=0 malwarescore=0 spamscore=0 suspectscore=0 clxscore=1011 bulkscore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610190000 definitions=main-2610300042 Tested on Power10 (ppc64le) Test configurations validated: Page sizes : 4K, 64K, 2MB hugepage, 1GB hugepage Test suites run: - libhugetlbfs test suite - LTP hugetlb tests - mm selftests (tools/testing/selftests/mm) - ndctl test suite via avocado (--map=mem and --map=dev, 2MB and 1GB alignment) https://github.com/avocado-framework-tests/avocado-misc-tests/blob/master/memory/ndctl.py - HTX mdt.pmem_all - Memory savings validation with 1GB alignment - Hash mode basic pmem tests No issues observed. Thanks for the patches. Tested-by: Pavithra Prakash