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Thu, 30 Apr 2026 05:57:05 -0700 (PDT) X-Received: by 2002:a05:622a:408e:b0:50d:597e:4b50 with SMTP id d75a77b69052e-5102ab23012mr41254981cf.13.1777553825018; Thu, 30 Apr 2026 05:57:05 -0700 (PDT) Received: from [192.168.2.110] ([70.53.202.134]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-8b3ff301dd3sm17442166d6.7.2026.04.30.05.57.03 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 30 Apr 2026 05:57:04 -0700 (PDT) Message-ID: <749c836e-30e0-44b9-a85a-34c6575bde18@redhat.com> Date: Thu, 30 Apr 2026 08:56:48 -0400 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 00/54] make MM selftests more CI friendly To: Mike Rapoport , Andrew Morton , David Hildenbrand Cc: Baolin Wang , Barry Song , Dev Jain , Donet Tom , Jason Gunthorpe , John Hubbard , "Liam R. Howlett" , Lance Yang , Leon Romanovsky , Lorenzo Stoakes , Mark Brown , Michal Hocko , Nico Pache , Peter Xu , Ryan Roberts , Sarthak Sharma , Shuah Khan , Suren Baghdasaryan , Vlastimil Babka , Zi Yan , linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org References: <20260428204240.1924129-1-rppt@kernel.org> From: Luiz Capitulino In-Reply-To: <20260428204240.1924129-1-rppt@kernel.org> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: UyOw5Xhlytm8F-QMyX1zMgTnbWDC6mkeEP5F1_UHHdc_1777553826 X-Mimecast-Originator: redhat.com Content-Language: en-US, en-CA Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Queue-Id: 2D2254000F X-Rspamd-Server: rspam04 X-Stat-Signature: ygkh9cmee7rqpnxutpn5wsfxch4hcfka X-HE-Tag: 1777553829-661282 X-HE-Meta: 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 URFiVlL/ 9RfKXT1yWp2s2+txycmqJuVWfgVA0g9NrL1YtM1odXodKxT5bsitpv82kbxE5CG9K+XEBgoNYXP7Njx6K4Yl/nH9LkBZOs7XVtrQfmAqmoddQ8D2Pyi5TBxsDC8zyQ+NCDGelcw9xmNYwSgVZCD+9T0dXvnMks7RkHs128+HGGPJCr1u4KMe761l2EMXUQz0NDUljAkzstgPbeifzDYu/Ki7kOIe0HD3Ce43XNVvcbxAMbArtMpmUPGQ90HTSaHGhIE98d6nR6EYzEN2wk9+sxSW/Eshzyj3y+b/srvfB9dWzlrWDDQRCOZW9Z5hcVcHa8ezhbelrKd00NxGk1Ji0RIp8efU+WHsBHLBoplsvBY/7nh3sC4tindBD9Wx/+mX+/Cd+AEsGm6R7tGmkAa6i/U7HPWs3xTmBF2GbzHI38ih23odWgTYtPTu82fPwUsXppplSPZ9DKnkWy41xv0gZp6Lr0XTYfFsBRnYK Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 2026-04-28 16:41, Mike Rapoport wrote: > From: "Mike Rapoport (Microsoft)" > > Hi, > > There's a lot of dancing around HugeTLB settings in run_vmtests.sh. > Some test need just a few default huge pages, some require at least 256 MB, and > some just skip lots of tests if huge pages of all supported sizes are not > available. > > The goal of this set is to make tests deal with HugeTLB setup and teardown. > > There are already convenient helpers that allow easy reading and writing of > /proc and /sysfs, so adding a few APIs that will detect and update HugeTLB > settings shouldn't be a big deal. But these nice helpers use kselftest > framework, and many of HugeTLB (and even THP) test don't, so as a result this > patchset also includes a lot of churn for conversion of those tests to > kselftest framework (patches 7-19). > > The series break out: > patches 1-5: small fixes > patch 6: merge of hugetlb mmap tests > patch 7: renaming of hugepage-* to hugetlb-* > patches 8-20: mechanical conversion to kselftest framework > patches 21-27: extension of thp_settings to hugepage_settings to also include > HugeTLB helpers > patches 28-29: add helpers for setting up SHM limits in hugetlb-shm and > thuge-gen tests > patches 30-52: integrate the new APIs in all the tests that use HugeTLB > patches 53-54: drop HugeTLB setup from run_vmtests.sh > > v3 changes: > * add patches that fix cleanup of fork()ed processes in migration test > * drop MADV_REMOVE changes to khugepage test > * properly setup memfd for non-default hugepages in hugetlb-mmap test > * add forgotten hugetlb_save_settings() to hugetlb_setup() > * fixes for ksft reporting > * rebase on v7.1-rc1 > * add more tags, thanks everyone! I reran my testing that previously reveled some of the bugs I reported for v2, they pass now. I ran them on an x86-64 guest with 88 vCPUs and also on a small s390 guest. The suite as a whole works as before (I also checked the HugeTLB state gets restored for each test). I'll be reviewing some of the individual patches, but for the suite as whole: Tested-by: Luiz Capitulino > v2: https://lore.kernel.org/all/20260418105539.1261536-1-rppt@kernel.org > * fix hugetlb mmap tests to actually test file mappings > * increase maximal tests number in khugepaged > * add tags, thanks everyone! > > v1: https://lore.kernel.org/all/20260406141735.2179309-1-rppt@kernel.org > > Mike Rapoport (Microsoft) (54): > selftests/mm: hugetlb-read-hwpoison: add SIGBUS handler > selftests/mm: migration: don't assume hupe page is TWOMEG > selftests/mm: migration: make nthreads represent number of working threads > selftests/mm: migration: properly cleanup fork()ed processes > selftests/mm: run_vmtests.sh: don't gate THP and KSM tests on HAVE_HUGEPAGES > selftests/mm: merge map_hugetlb into hugepage-mmap > selftests/mm: rename hugepage-* tests to hugetlb-* > selftests/mm: hugetlb-shm: use kselftest framework > selftests/mm: hugetlb-vmemmap: use kselftest framework > selftests/mm: hugetlb-madvise: use kselftest framework > selftests/mm: hugetlb_madv_vs_map: use kselftest framework > selftests/mm: hugetlb-read-hwpoison: use kselftest framework > selftests/mm: khugepaged: group tests in an array > selftests/mm: khugepaged: use ksefltest framework > selftests/mm: ksm_tests: use kselftest framework > selftests/mm: protection_keys: use descriptive test names in TAP output > selftests/mm: protection_keys: use kselftest framework > selftests/mm: uffd-stress: use kselftest framework > selftests/mm: uffd-unit-tests: use kselftest framework > selftests/mm: va_high_addr_switch: use kselftest framework > selftests/mm: add atexit() and signal handlers to thp_settings > selftests/mm: rename thp_settings.[ch] to hugepage_settings.[ch] > selftests/mm: move HugeTLB helpers to hugepage_settings > selftests/mm: hugepage_settings: use unsigned long in detect_hugetlb_page_size > selftests/mm: hugepage_settings: add APIs to get and set nr_hugepages > selftests/mm: hugepage_settings: rename get_free_hugepages() > selftests/mm: hugepage_settings: add APIs for HugeTLB setup and teardown > selftests/mm: move read_file(), read_num() and write_num() to vm_util > selftests/mm: vm_util: add helpers to set and restore shm limits > selftests/mm: compaction_test: use HugeTLB helpers ... > selftests/mm: cow: add setup of HugeTLB pages > selftests/mm: gup_longterm: add setup of HugeTLB pages > selftests/mm: gup_test: add setup of HugeTLB pages > selftests/mm: hmm-tests: add setup of HugeTLB pages > selftests/mm: hugepage_dio: add setup of HugeTLB pages > selftests/mm: hugetlb_fault_after_madv: add setup of HugeTLB pages > selftests/mm: hugetlb-madvise: add setup of HugeTLB pages > selftests/mm: hugetlb_madv_vs_map: add setup of HugeTLB pages > selftests/mm: hugetlb-mmap: add setup of HugeTLB pages > selftests/mm: hugetlb-mremap: add setup of HugeTLB pages > selftests/mm: hugetlb-shm: add setup of HugeTLB pages > selftests/mm: hugetlb-soft-online: add setup of HugeTLB pages > selftests/mm: hugetlb-vmemmap: add setup of HugeTLB pages > selftests/mm: migration: add setup of HugeTLB pages > selftests/mm: pagemap_ioctl: add setup of HugeTLB pages > selftests/mm: protection_keys: use library code for HugeTLB setup > selftests/mm: thuge-gen: add setup of HugeTLB pages > selftests/mm: uffd-stress: use hugetlb_save and alloc huge pages > selftests/mm: uffd-unit-tests: add setup of HugeTLB pages > selftests/mm: uffd-wp-mremap: add setup of HugeTLB pages > selftests/mm: va_high_addr_switch: add setup of HugeTLB pages > selftests/mm: va_high_addr_switch.sh: drop huge pages setup > selftests/mm: run_vmtests.sh: free memory if available memory is low > selftests/mm: run_vmtests.sh: drop detection and setup of HugeTLB > > tools/testing/selftests/mm/.gitignore | 4 + > tools/testing/selftests/mm/Makefile | 13 +- > tools/testing/selftests/mm/compaction_test.c | 113 +----- > tools/testing/selftests/mm/cow.c | 29 +- > .../selftests/mm/folio_split_race_test.c | 2 +- > tools/testing/selftests/mm/guard-regions.c | 2 +- > tools/testing/selftests/mm/gup_longterm.c | 3 +- > tools/testing/selftests/mm/gup_test.c | 12 + > tools/testing/selftests/mm/hmm-tests.c | 24 +- > tools/testing/selftests/mm/hugepage-mmap.c | 78 ---- > .../{thp_settings.c => hugepage_settings.c} | 286 +++++++++++-- > .../{thp_settings.h => hugepage_settings.h} | 75 +++- > tools/testing/selftests/mm/hugetlb-madvise.c | 209 ++++------ > tools/testing/selftests/mm/hugetlb-mmap.c | 145 +++++++ > .../{hugepage-mremap.c => hugetlb-mremap.c} | 13 +- > .../selftests/mm/hugetlb-read-hwpoison.c | 123 +++--- > .../mm/{hugepage-shm.c => hugetlb-shm.c} | 64 +-- > .../selftests/mm/hugetlb-soft-offline.c | 45 +-- > .../{hugepage-vmemmap.c => hugetlb-vmemmap.c} | 46 +-- > tools/testing/selftests/mm/hugetlb_dio.c | 15 +- > .../selftests/mm/hugetlb_fault_after_madv.c | 7 +- > .../selftests/mm/hugetlb_madv_vs_map.c | 22 +- > tools/testing/selftests/mm/khugepaged.c | 380 ++++++++---------- > tools/testing/selftests/mm/ksm_tests.c | 182 ++++----- > tools/testing/selftests/mm/map_hugetlb.c | 88 ---- > tools/testing/selftests/mm/migration.c | 152 ++++--- > tools/testing/selftests/mm/pagemap_ioctl.c | 13 +- > tools/testing/selftests/mm/pkey-helpers.h | 6 +- > .../testing/selftests/mm/prctl_thp_disable.c | 2 +- > tools/testing/selftests/mm/protection_keys.c | 130 +++--- > tools/testing/selftests/mm/run_vmtests.sh | 177 ++------ > tools/testing/selftests/mm/soft-dirty.c | 2 +- > .../selftests/mm/split_huge_page_test.c | 2 +- > tools/testing/selftests/mm/thuge-gen.c | 80 +--- > tools/testing/selftests/mm/transhuge-stress.c | 2 +- > tools/testing/selftests/mm/uffd-common.h | 1 + > tools/testing/selftests/mm/uffd-stress.c | 44 +- > tools/testing/selftests/mm/uffd-unit-tests.c | 110 +++-- > tools/testing/selftests/mm/uffd-wp-mremap.c | 12 +- > .../selftests/mm/va_high_addr_switch.c | 42 +- > .../selftests/mm/va_high_addr_switch.sh | 41 +- > tools/testing/selftests/mm/vm_util.c | 133 +++--- > tools/testing/selftests/mm/vm_util.h | 15 +- > 43 files changed, 1424 insertions(+), 1520 deletions(-) > delete mode 100644 tools/testing/selftests/mm/hugepage-mmap.c > rename tools/testing/selftests/mm/{thp_settings.c => hugepage_settings.c} (60%) > rename tools/testing/selftests/mm/{thp_settings.h => hugepage_settings.h} (55%) > create mode 100644 tools/testing/selftests/mm/hugetlb-mmap.c > rename tools/testing/selftests/mm/{hugepage-mremap.c => hugetlb-mremap.c} (94%) > rename tools/testing/selftests/mm/{hugepage-shm.c => hugetlb-shm.c} (57%) > rename tools/testing/selftests/mm/{hugepage-vmemmap.c => hugetlb-vmemmap.c} (76%) > delete mode 100644 tools/testing/selftests/mm/map_hugetlb.c > > > base-commit: 254f49634ee16a731174d2ae34bc50bd5f45e731 > -- > 2.53.0 >