{"id":2232288,"url":"http://patchwork.ozlabs.org/api/patches/2232288/?format=json","web_url":"http://patchwork.ozlabs.org/project/linuxppc-dev/patch/91e4eb8e0d0b5a27e166eca59fd7750fe6e34036.1777877814.git.sayalip@linux.ibm.com/","project":{"id":2,"url":"http://patchwork.ozlabs.org/api/projects/2/?format=json","name":"Linux PPC 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<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 v6 14/14] selftests/mm: clarify alternate unmapping in\n compaction_test","Date":"Mon,  4 May 2026 13:54:51 +0530","Message-ID":"\n <91e4eb8e0d0b5a27e166eca59fd7750fe6e34036.1777877814.git.sayalip@linux.ibm.com>","X-Mailer":"git-send-email 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engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49\n definitions=2026-05-04_03,2026-04-30_02,2025-10-01_01","X-Proofpoint-Spam-Details":"rule=outbound_notspam policy=outbound score=0\n bulkscore=0 lowpriorityscore=0 suspectscore=0 adultscore=0 spamscore=0\n priorityscore=1501 impostorscore=0 phishscore=0 malwarescore=0 clxscore=1015\n classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0\n reason=mlx scancount=1 engine=8.22.0-2604200000 definitions=main-2605040087","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":"Add a comment explaining that every other entry in the list is\nunmapped to intentionally create fragmentation with\nlocked pages before invoking check_compaction().\n\nFixes: bd67d5c15cc1 (\"Test compaction of mlocked memory\")\nTested-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com>\nSigned-off-by: Sayali Patil <sayalip@linux.ibm.com>\n---\n tools/testing/selftests/mm/compaction_test.c | 3 +++\n 1 file changed, 3 insertions(+)","diff":"diff --git a/tools/testing/selftests/mm/compaction_test.c b/tools/testing/selftests/mm/compaction_test.c\nindex 30209c40b697..e1610e2fbdf6 100644\n--- a/tools/testing/selftests/mm/compaction_test.c\n+++ b/tools/testing/selftests/mm/compaction_test.c\n@@ -261,6 +261,9 @@ int main(int argc, char **argv)\n \t\tmem_fragmentable_MB -= MAP_SIZE_MB;\n \t}\n \n+\t/* Unmap every other entry in the list to create fragmentation with\n+\t * locked pages before invoking check_compaction().\n+\t */\n \tfor (entry = list; entry != NULL; entry = entry->next) {\n \t\tmunmap(entry->map, MAP_SIZE);\n \t\tif (!entry->next)\n","prefixes":["v6","14/14"]}