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GET /api/patches/2220086/?format=api
{ "id": 2220086, "url": "http://patchwork.ozlabs.org/api/patches/2220086/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/67c963da1868fd91d2814dcd1b80d385ebf63c35.1775466329.git.sayalip@linux.ibm.com/", "project": { "id": 2, "url": "http://patchwork.ozlabs.org/api/projects/2/?format=api", "name": "Linux PPC development", "link_name": "linuxppc-dev", "list_id": "linuxppc-dev.lists.ozlabs.org", "list_email": "linuxppc-dev@lists.ozlabs.org", "web_url": "https://github.com/linuxppc/wiki/wiki", "scm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git", "webscm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/", "list_archive_url_format": "https://lore.kernel.org/linuxppc-dev/{}/", "commit_url_format": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id={}" }, "msgid": "<67c963da1868fd91d2814dcd1b80d385ebf63c35.1775466329.git.sayalip@linux.ibm.com>", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/67c963da1868fd91d2814dcd1b80d385ebf63c35.1775466329.git.sayalip@linux.ibm.com/", "date": "2026-04-06T09:19:21", "name": "[v4,02/15] selftests/mm: fix hugetlb pathname construction in charge_reserved_hugetlb.sh", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "53b4658db1f112c20bb1e7f72441b1fe960adba2", "submitter": { "id": 92656, "url": "http://patchwork.ozlabs.org/api/people/92656/?format=api", "name": "Sayali Patil", "email": "sayalip@linux.ibm.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/67c963da1868fd91d2814dcd1b80d385ebf63c35.1775466329.git.sayalip@linux.ibm.com/mbox/", "series": [ { "id": 498833, "url": "http://patchwork.ozlabs.org/api/series/498833/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=498833", "date": "2026-04-06T09:19:22", "name": "selftests/mm: fix failures and robustness improvements", "version": 4, "mbox": "http://patchwork.ozlabs.org/series/498833/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2220086/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2220086/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linuxppc-dev+bounces-19401-incoming=patchwork.ozlabs.org@lists.ozlabs.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linuxppc-dev@lists.ozlabs.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256\n header.s=pp1 header.b=cM40Y6hg;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n (client-ip=112.213.38.117; helo=lists.ozlabs.org;\n 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bh=M4+alkDxk2QDPF16d\n\tmwas9Ikm+JFGV/Ks8483HUpmmI=; b=cM40Y6hgSbyOdEX5FkSVGj4iL575l2al2\n\t+3Yxf/fkmwOsRfO8V7gRuUgPbyZyaGuhSkO4aR32H+s4XDeUNyaqv2uuz/9zcGPM\n\tcTwJGM4cKZeZA/iuY/G85rId296AoTk6WiKjgsLdSLP8ynuYihZsZ3OwmzxSKFQj\n\tJSuQotx9PWh7HkuvzAL60VAq5sbLPAIXansE3ZQFD7mGJ3q6Gfiv16FFZzmVMj+/\n\tmZd1E+g/YadSwEvofVV9yIBaAjUc83XG/MIQYej0Fke6fU4XyT/ullyE/VkqfAWe\n\tQ3wfQWBaDCpne8bL7yDl95IOC9Zhe85xQwxLwYu0TLswjLZb09yiQ==", "From": "Sayali Patil <sayalip@linux.ibm.com>", "To": "Andrew Morton <akpm@linux-foundation.org>, Shuah Khan <shuah@kernel.org>,\n linux-mm@kvack.org, linux-kernel@vger.kernel.org,\n linux-kselftest@vger.kernel.org,\n Ritesh Harjani <ritesh.list@gmail.com>", "Cc": "David Hildenbrand <david@kernel.org>, Zi Yan <ziy@nvidia.com>,\n Michal Hocko <mhocko@kernel.org>, Oscar Salvador <osalvador@suse.de>,\n Lorenzo Stoakes <lorenzo.stoakes@oracle.com>,\n Dev Jain <dev.jain@arm.com>, Liam.Howlett@oracle.com,\n linuxppc-dev@lists.ozlabs.org, Miaohe Lin <linmiaohe@huawei.com>,\n Venkat Rao Bagalkote <venkat88@linux.ibm.com>,\n Sayali Patil <sayalip@linux.ibm.com>", "Subject": "[PATCH v4 02/15] selftests/mm: fix hugetlb pathname construction in\n charge_reserved_hugetlb.sh", "Date": "Mon, 6 Apr 2026 14:49:21 +0530", "Message-ID": "\n <67c963da1868fd91d2814dcd1b80d385ebf63c35.1775466329.git.sayalip@linux.ibm.com>", "X-Mailer": "git-send-email 2.52.0", "In-Reply-To": "<cover.1775466329.git.sayalip@linux.ibm.com>", "References": "<cover.1775466329.git.sayalip@linux.ibm.com>", "X-Mailing-List": "linuxppc-dev@lists.ozlabs.org", "List-Id": "<linuxppc-dev.lists.ozlabs.org>", "List-Help": "<mailto:linuxppc-dev+help@lists.ozlabs.org>", "List-Owner": "<mailto:linuxppc-dev+owner@lists.ozlabs.org>", "List-Post": "<mailto:linuxppc-dev@lists.ozlabs.org>", "List-Archive": "<https://lore.kernel.org/linuxppc-dev/>,\n <https://lists.ozlabs.org/pipermail/linuxppc-dev/>", "List-Subscribe": "<mailto:linuxppc-dev+subscribe@lists.ozlabs.org>,\n <mailto:linuxppc-dev+subscribe-digest@lists.ozlabs.org>,\n <mailto:linuxppc-dev+subscribe-nomail@lists.ozlabs.org>", "List-Unsubscribe": "<mailto:linuxppc-dev+unsubscribe@lists.ozlabs.org>", "Precedence": "list", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-TM-AS-GCONF": "00", "X-Proofpoint-Reinject": "loops=2 maxloops=12", "X-Authority-Analysis": "v=2.4 cv=Bp+QAIX5 c=1 sm=1 tr=0 ts=69d37abc cx=c_pps\n a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17\n a=A5OVakUREuEA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22\n a=uAbxVGIbfxUO_5tXvNgY:22 a=Ikd4Dj_1AAAA:8 a=VwQbUJbxAAAA:8 a=VnNF1IyMAAAA:8\n a=TdliVB_93dTD34Rfq5YA:9", "X-Proofpoint-Spam-Details-Enc": "AW1haW4tMjYwNDA2MDA5MCBTYWx0ZWRfXyIR0f9sXMiHR\n 4volGAleBjScG14mEgUoX/SYMxdizzzclNpUobfSCV7Ql3LhXXGj7T2MqsPnGC+PspTDAOXYo5G\n jfJ0Ewl5HLed8al79WODuTF3aqJVFSBXTRryiyhBYEYaejIKCTaivpy9bNLhXmG2ogW5dAKe8Mf\n 1oEdpVl1rZ0wX7/A5F6ct3CIpj25IY01de9yV9vZIpGOpXVWbXGWTKk2Sg1yT+uJtwscll8Ege6\n /8aL/0MmcJvKwYIbcKDM/bSrdXnZClUpkdY1vPGaxo+pwgzNxzhdtTxBB3qAmdu0GIPw4Jr2mVb\n zNiVyx3VYV1JtMQpablqQWqDkI3WFnvaRNwJZVe2qYvRI5A5y/5HWynyK7LRjfvxwZZMHRYmJhD\n I3tKxtW5T7iHCkKsc6G/PItq+23so4jRni4eUig/g3s5IIxCy8Vo/C+bpaP7gOmEt/VNH1yTnK/\n k9xWAUO9tP1HQ9/DYBw==", "X-Proofpoint-GUID": "6uWWAE2Cts1bRfKlzPWidc2c4_HYNEm9", "X-Proofpoint-ORIG-GUID": "5uGU7oxt_xsx-GFfGTIr0VVr179USnLp", "X-Proofpoint-Virus-Version": "vendor=baseguard\n engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49\n definitions=2026-04-06_02,2026-04-03_01,2025-10-01_01", "X-Proofpoint-Spam-Details": "rule=outbound_notspam policy=outbound score=0\n phishscore=0 malwarescore=0 suspectscore=0 adultscore=0 impostorscore=0\n spamscore=0 priorityscore=1501 lowpriorityscore=0 bulkscore=0 clxscore=1015\n classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0\n reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2604060090", "X-Spam-Status": "No, score=-0.7 required=3.0 tests=DKIM_SIGNED,DKIM_VALID,\n\tRCVD_IN_DNSWL_LOW,RCVD_IN_MSPIKE_H4,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,\n\tSPF_PASS autolearn=disabled version=4.0.1 OzLabs 8", "X-Spam-Checker-Version": "SpamAssassin 4.0.1 (2024-03-25) on lists.ozlabs.org" }, "content": "The charge_reserved_hugetlb.sh script assumes hugetlb cgroup memory\ninterface file names use the \"<size>MB\" format\n(e.g. hugetlb.1024MB.current).\nThis assumption breaks on systems with larger huge pages such as 1GB,\nwhere the kernel exposes normalized units:\n hugetlb.1GB.current\n hugetlb.1GB.max\n hugetlb.1GB.rsvd.max\n ...\n\nAs a result, the script attempts to access files like\nhugetlb.1024MB.current, which do not exist when the kernel reports the\nsize in GB.\n\nNormalize the huge page size and construct the pathname using the\nappropriate unit (MB or GB), matching the hugetlb controller naming.\n\nFixes: 209376ed2a84 (\"selftests/vm: make charge_reserved_hugetlb.sh work with existing cgroup setting\")\nFixes: 29750f71a9b4 (\"hugetlb_cgroup: add hugetlb_cgroup reservation tests\")\nReviewed-by: Zi Yan <ziy@nvidia.com>\nAcked-by: David Hildenbrand (Arm) <david@kernel.org>\nTested-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com>\nSigned-off-by: Sayali Patil <sayalip@linux.ibm.com>\n---\n .../selftests/mm/charge_reserved_hugetlb.sh | 42 +++++++++++++------\n 1 file changed, 29 insertions(+), 13 deletions(-)", "diff": "diff --git a/tools/testing/selftests/mm/charge_reserved_hugetlb.sh b/tools/testing/selftests/mm/charge_reserved_hugetlb.sh\nindex ca33ec83ebf2..4aa7920b533e 100755\n--- a/tools/testing/selftests/mm/charge_reserved_hugetlb.sh\n+++ b/tools/testing/selftests/mm/charge_reserved_hugetlb.sh\n@@ -89,6 +89,15 @@ function get_machine_hugepage_size() {\n }\n \n MB=$(get_machine_hugepage_size)\n+if (( MB >= 1024 )); then\n+ # For 1GB hugepages\n+ UNIT=\"GB\"\n+ MB_DISPLAY=$((MB / 1024))\n+else\n+ # For 2MB hugepages\n+ UNIT=\"MB\"\n+ MB_DISPLAY=$MB\n+fi\n \n function setup_cgroup() {\n local name=\"$1\"\n@@ -98,11 +107,12 @@ function setup_cgroup() {\n mkdir $cgroup_path/$name\n \n echo writing cgroup limit: \"$cgroup_limit\"\n- echo \"$cgroup_limit\" >$cgroup_path/$name/hugetlb.${MB}MB.$fault_limit_file\n+ echo \"$cgroup_limit\" > \\\n+\t $cgroup_path/$name/hugetlb.${MB_DISPLAY}${UNIT}.$fault_limit_file\n \n echo writing reservation limit: \"$reservation_limit\"\n echo \"$reservation_limit\" > \\\n- $cgroup_path/$name/hugetlb.${MB}MB.$reservation_limit_file\n+ $cgroup_path/$name/hugetlb.${MB_DISPLAY}${UNIT}.$reservation_limit_file\n \n if [ -e \"$cgroup_path/$name/cpuset.cpus\" ]; then\n echo 0 >$cgroup_path/$name/cpuset.cpus\n@@ -137,7 +147,7 @@ function wait_for_file_value() {\n \n function wait_for_hugetlb_memory_to_get_depleted() {\n local cgroup=\"$1\"\n- local path=\"$cgroup_path/$cgroup/hugetlb.${MB}MB.$reservation_usage_file\"\n+ local path=\"$cgroup_path/$cgroup/hugetlb.${MB_DISPLAY}${UNIT}.$reservation_usage_file\"\n \n wait_for_file_value \"$path\" \"0\"\n }\n@@ -145,7 +155,7 @@ function wait_for_hugetlb_memory_to_get_depleted() {\n function wait_for_hugetlb_memory_to_get_reserved() {\n local cgroup=\"$1\"\n local size=\"$2\"\n- local path=\"$cgroup_path/$cgroup/hugetlb.${MB}MB.$reservation_usage_file\"\n+ local path=\"$cgroup_path/$cgroup/hugetlb.${MB_DISPLAY}${UNIT}.$reservation_usage_file\"\n \n wait_for_file_value \"$path\" \"$size\"\n }\n@@ -153,7 +163,7 @@ function wait_for_hugetlb_memory_to_get_reserved() {\n function wait_for_hugetlb_memory_to_get_written() {\n local cgroup=\"$1\"\n local size=\"$2\"\n- local path=\"$cgroup_path/$cgroup/hugetlb.${MB}MB.$fault_usage_file\"\n+ local path=\"$cgroup_path/$cgroup/hugetlb.${MB_DISPLAY}${UNIT}.$fault_usage_file\"\n \n wait_for_file_value \"$path\" \"$size\"\n }\n@@ -175,8 +185,8 @@ function write_hugetlbfs_and_get_usage() {\n hugetlb_difference=0\n reserved_difference=0\n \n- local hugetlb_usage=$cgroup_path/$cgroup/hugetlb.${MB}MB.$fault_usage_file\n- local reserved_usage=$cgroup_path/$cgroup/hugetlb.${MB}MB.$reservation_usage_file\n+ local hugetlb_usage=$cgroup_path/$cgroup/hugetlb.${MB_DISPLAY}${UNIT}.$fault_usage_file\n+ local reserved_usage=$cgroup_path/$cgroup/hugetlb.${MB_DISPLAY}${UNIT}.$reservation_usage_file\n \n local hugetlb_before=$(cat $hugetlb_usage)\n local reserved_before=$(cat $reserved_usage)\n@@ -307,8 +317,10 @@ function run_test() {\n \n cleanup_hugetlb_memory \"hugetlb_cgroup_test\"\n \n- local final_hugetlb=$(cat $cgroup_path/hugetlb_cgroup_test/hugetlb.${MB}MB.$fault_usage_file)\n- local final_reservation=$(cat $cgroup_path/hugetlb_cgroup_test/hugetlb.${MB}MB.$reservation_usage_file)\n+ local final_hugetlb=$(cat \\\n+\t $cgroup_path/hugetlb_cgroup_test/hugetlb.${MB_DISPLAY}${UNIT}.$fault_usage_file)\n+ local final_reservation=$(cat \\\n+\t $cgroup_path/hugetlb_cgroup_test/hugetlb.${MB_DISPLAY}${UNIT}.$reservation_usage_file)\n \n echo $hugetlb_difference\n echo $reserved_difference\n@@ -364,10 +376,14 @@ function run_multiple_cgroup_test() {\n reservation_failed1=$reservation_failed\n oom_killed1=$oom_killed\n \n- local cgroup1_hugetlb_usage=$cgroup_path/hugetlb_cgroup_test1/hugetlb.${MB}MB.$fault_usage_file\n- local cgroup1_reservation_usage=$cgroup_path/hugetlb_cgroup_test1/hugetlb.${MB}MB.$reservation_usage_file\n- local cgroup2_hugetlb_usage=$cgroup_path/hugetlb_cgroup_test2/hugetlb.${MB}MB.$fault_usage_file\n- local cgroup2_reservation_usage=$cgroup_path/hugetlb_cgroup_test2/hugetlb.${MB}MB.$reservation_usage_file\n+ local cgroup1_hugetlb_usage=\\\n+\t $cgroup_path/hugetlb_cgroup_test1/hugetlb.${MB_DISPLAY}${UNIT}.$fault_usage_file\n+ local cgroup1_reservation_usage=\\\n+\t $cgroup_path/hugetlb_cgroup_test1/hugetlb.${MB_DISPLAY}${UNIT}.$reservation_usage_file\n+ local cgroup2_hugetlb_usage=\\\n+\t $cgroup_path/hugetlb_cgroup_test2/hugetlb.${MB_DISPLAY}${UNIT}.$fault_usage_file\n+ local cgroup2_reservation_usage=\\\n+\t $cgroup_path/hugetlb_cgroup_test2/hugetlb.${MB_DISPLAY}${UNIT}.$reservation_usage_file\n \n local usage_before_second_write=$(cat $cgroup1_hugetlb_usage)\n local reservation_usage_before_second_write=$(cat $cgroup1_reservation_usage)\n", "prefixes": [ "v4", "02/15" ] }