linux-dev/tools/testing/selftests/cgroup, branch master

Merge tag 'mm-stable-2022-10-08' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2022-10-11T00:53:04Z

Pull MM updates from Andrew Morton: - Yu Zhao's Multi-Gen LRU patches are here. They've been under test in linux-next for a couple of months without, to my knowledge, any negative reports (or any positive ones, come to that). - Also the Maple Tree from Liam Howlett. An overlapping range-based tree for vmas. It it apparently slightly more efficient in its own right, but is mainly targeted at enabling work to reduce mmap_lock contention. Liam has identified a number of other tree users in the kernel which could be beneficially onverted to mapletrees. Yu Zhao has identified a hard-to-hit but "easy to fix" lockdep splat at [1]. This has yet to be addressed due to Liam's unfortunately timed vacation. He is now back and we'll get this fixed up. - Dmitry Vyukov introduces KMSAN: the Kernel Memory Sanitizer. It uses clang-generated instrumentation to detect used-unintialized bugs down to the single bit level. KMSAN keeps finding bugs. New ones, as well as the legacy ones. - Yang Shi adds a userspace mechanism (madvise) to induce a collapse of memory into THPs. - Zach O'Keefe has expanded Yang Shi's madvise(MADV_COLLAPSE) to support file/shmem-backed pages. - userfaultfd updates from Axel Rasmussen - zsmalloc cleanups from Alexey Romanov - cleanups from Miaohe Lin: vmscan, hugetlb_cgroup, hugetlb and memory-failure - Huang Ying adds enhancements to NUMA balancing memory tiering mode's page promotion, with a new way of detecting hot pages. - memcg updates from Shakeel Butt: charging optimizations and reduced memory consumption. - memcg cleanups from Kairui Song. - memcg fixes and cleanups from Johannes Weiner. - Vishal Moola provides more folio conversions - Zhang Yi removed ll_rw_block() :( - migration enhancements from Peter Xu - migration error-path bugfixes from Huang Ying - Aneesh Kumar added ability for a device driver to alter the memory tiering promotion paths. For optimizations by PMEM drivers, DRM drivers, etc. - vma merging improvements from Jakub Matěn. - NUMA hinting cleanups from David Hildenbrand. - xu xin added aditional userspace visibility into KSM merging activity. - THP & KSM code consolidation from Qi Zheng. - more folio work from Matthew Wilcox. - KASAN updates from Andrey Konovalov. - DAMON cleanups from Kaixu Xia. - DAMON work from SeongJae Park: fixes, cleanups. - hugetlb sysfs cleanups from Muchun Song. - Mike Kravetz fixes locking issues in hugetlbfs and in hugetlb core. Link: https://lkml.kernel.org/r/CAOUHufZabH85CeUN-MEMgL8gJGzJEWUrkiM58JkTbBhh-jew0Q@mail.gmail.com [1] * tag 'mm-stable-2022-10-08' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (555 commits) hugetlb: allocate vma lock for all sharable vmas hugetlb: take hugetlb vma_lock when clearing vma_lock->vma pointer hugetlb: fix vma lock handling during split vma and range unmapping mglru: mm/vmscan.c: fix imprecise comments mm/mglru: don't sync disk for each aging cycle mm: memcontrol: drop dead CONFIG_MEMCG_SWAP config symbol mm: memcontrol: use do_memsw_account() in a few more places mm: memcontrol: deprecate swapaccounting=0 mode mm: memcontrol: don't allocate cgroup swap arrays when memcg is disabled mm/secretmem: remove reduntant return value mm/hugetlb: add available_huge_pages() func mm: remove unused inline functions from include/linux/mm_inline.h selftests/vm: add selftest for MADV_COLLAPSE of uffd-minor memory selftests/vm: add file/shmem MADV_COLLAPSE selftest for cleared pmd selftests/vm: add thp collapse shmem testing selftests/vm: add thp collapse file and tmpfs testing selftests/vm: modularize thp collapse memory operations selftests/vm: dedup THP helpers mm/khugepaged: add tracepoint to hpage_collapse_scan_file() mm/madvise: add file and shmem support to MADV_COLLAPSE ...

mm: memcontrol: drop dead CONFIG_MEMCG_SWAP config symbol

2022-10-03T21:03:36Z

Since 2d1c498072de ("mm: memcontrol: make swap tracking an integral part of memory control"), CONFIG_MEMCG_SWAP hasn't been a user-visible config option anymore, it just means CONFIG_MEMCG && CONFIG_SWAP. Update the sites accordingly and drop the symbol. [ While touching the docs, remove two references to CONFIG_MEMCG_KMEM, which hasn't been a user-visible symbol for over half a decade. ] Link: https://lkml.kernel.org/r/20220926135704.400818-5-hannes@cmpxchg.org Signed-off-by: Johannes Weiner Acked-by: Shakeel Butt Cc: Hugh Dickins Cc: Michal Hocko Cc: Roman Gushchin Signed-off-by: Andrew Morton

kselftest/cgroup: Add cpuset v2 partition root state test

2022-09-04T20:47:28Z

Add a test script test_cpuset_prs.sh with a helper program wait_inotify for exercising the cpuset v2 partition root state code. Signed-off-by: Waiman Long Signed-off-by: Tejun Heo

Merge tag 'mm-stable-2022-05-27' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2022-05-27T18:40:49Z

Pull more MM updates from Andrew Morton: - Two follow-on fixes for the post-5.19 series "Use pageblock_order for cma and alloc_contig_range alignment", from Zi Yan. - A series of z3fold cleanups and fixes from Miaohe Lin. - Some memcg selftests work from Michal Koutný - Some swap fixes and cleanups from Miaohe Lin - Several individual minor fixups * tag 'mm-stable-2022-05-27' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (25 commits) mm/shmem.c: suppress shift warning mm: Kconfig: reorganize misplaced mm options mm: kasan: fix input of vmalloc_to_page() mm: fix is_pinnable_page against a cma page mm: filter out swapin error entry in shmem mapping mm/shmem: fix infinite loop when swap in shmem error at swapoff time mm/madvise: free hwpoison and swapin error entry in madvise_free_pte_range mm/swapfile: fix lost swap bits in unuse_pte() mm/swapfile: unuse_pte can map random data if swap read fails selftests: memcg: factor out common parts of memory.{low,min} tests selftests: memcg: remove protection from top level memcg selftests: memcg: adjust expected reclaim values of protected cgroups selftests: memcg: expect no low events in unprotected sibling selftests: memcg: fix compilation mm/z3fold: fix z3fold_page_migrate races with z3fold_map mm/z3fold: fix z3fold_reclaim_page races with z3fold_free mm/z3fold: always clear PAGE_CLAIMED under z3fold page lock mm/z3fold: put z3fold page back into unbuddied list when reclaim or migration fails revert "mm/z3fold.c: allow __GFP_HIGHMEM in z3fold_alloc" mm/z3fold: throw warning on failure of trylock_page in z3fold_alloc ...

selftests: memcg: factor out common parts of memory.{low,min} tests

2022-05-27T16:33:45Z

The memory protection test setup and runtime is almost equal for memory.low and memory.min cases. It makes modification of the common parts prone to mistakes, since the protections are similar not only in setup but also in principle, factor the common part out. Past exceptions between the tests: - missing memory.min is fine (kept), - test_memcg_low protected orphaned pagecache (adapted like test_memcg_min and we keep the processes of protected memory running). The evaluation in two tests is different (OOM of allocator vs low events of protégés), this is kept different. Link: https://lkml.kernel.org/r/20220518161859.21565-6-mkoutny@suse.com Signed-off-by: Michal Koutný Acked-by: Roman Gushchin CC: Johannes Weiner Cc: Michal Hocko Cc: Shakeel Butt Cc: Richard Palethorpe Cc: David Vernet Signed-off-by: Andrew Morton

selftests: memcg: remove protection from top level memcg

2022-05-27T16:33:45Z

The reclaim is triggered by memory limit in a subtree, therefore the testcase does not need configured protection against external reclaim. Also, correct respective comments. Link: https://lkml.kernel.org/r/20220518161859.21565-5-mkoutny@suse.com Signed-off-by: Michal Koutný Acked-by: Roman Gushchin Cc: David Vernet Cc: Johannes Weiner Cc: Michal Hocko Cc: Richard Palethorpe Cc: Shakeel Butt Signed-off-by: Andrew Morton

selftests: memcg: adjust expected reclaim values of protected cgroups

2022-05-27T16:33:45Z

The numbers are not easy to derive in a closed form (certainly mere protections ratios do not apply), therefore use a simulation to obtain expected numbers. Link: https://lkml.kernel.org/r/20220518161859.21565-4-mkoutny@suse.com Signed-off-by: Michal Koutný Acked-by: Roman Gushchin Cc: David Vernet Cc: Johannes Weiner Cc: Michal Hocko Cc: Richard Palethorpe Cc: Shakeel Butt Signed-off-by: Andrew Morton

selftests: memcg: expect no low events in unprotected sibling

2022-05-27T16:33:45Z

This is effectively a revert of commit cdc69458a5f3 ("cgroup: account for memory_recursiveprot in test_memcg_low()"). The case test_memcg_low will fail with memory_recursiveprot until resolved in reclaim code. However, this patch preserves the existing helpers and variables for later uses. Link: https://lkml.kernel.org/r/20220518161859.21565-3-mkoutny@suse.com Signed-off-by: Michal Koutný Reviewed-by: David Vernet Cc: Johannes Weiner Cc: Michal Hocko Cc: Richard Palethorpe Cc: Roman Gushchin Cc: Shakeel Butt Signed-off-by: Andrew Morton

selftests: memcg: fix compilation

2022-05-27T16:33:44Z

Patch series "memcontrol selftests fixups", v2. Flushing the patches to make memcontrol selftests check the events behavior we had consensus about (test_memcg_low fails). (test_memcg_reclaim, test_memcg_swap_max fail for me now but it's present even before the refactoring.) The two bigger changes are: - adjustment of the protected values to make tests succeed with the given tolerance, - both test_memcg_low and test_memcg_min check protection of memory in populated cgroups (actually as per Documentation/admin-guide/cgroup-v2.rst memory.min should not apply to empty cgroups, which is not the case currently. Therefore I unified tests with the populated case in order to to bring more broken tests). This patch (of 5): This fixes mis-applied changes from commit 72b1e03aa725 ("cgroup: account for memory_localevents in test_memcg_oom_group_leaf_events()"). Link: https://lkml.kernel.org/r/20220518161859.21565-1-mkoutny@suse.com Link: https://lkml.kernel.org/r/20220518161859.21565-2-mkoutny@suse.com Signed-off-by: Michal Koutný Reviewed-by: David Vernet Acked-by: Roman Gushchin Cc: Johannes Weiner Cc: Michal Hocko Cc: Richard Palethorpe Cc: Shakeel Butt Signed-off-by: Andrew Morton

Merge tag 'mm-stable-2022-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2022-05-26T19:32:41Z

Pull MM updates from Andrew Morton: "Almost all of MM here. A few things are still getting finished off, reviewed, etc. - Yang Shi has improved the behaviour of khugepaged collapsing of readonly file-backed transparent hugepages. - Johannes Weiner has arranged for zswap memory use to be tracked and managed on a per-cgroup basis. - Munchun Song adds a /proc knob ("hugetlb_optimize_vmemmap") for runtime enablement of the recent huge page vmemmap optimization feature. - Baolin Wang contributes a series to fix some issues around hugetlb pagetable invalidation. - Zhenwei Pi has fixed some interactions between hwpoisoned pages and virtualization. - Tong Tiangen has enabled the use of the presently x86-only page_table_check debugging feature on arm64 and riscv. - David Vernet has done some fixup work on the memcg selftests. - Peter Xu has taught userfaultfd to handle write protection faults against shmem- and hugetlbfs-backed files. - More DAMON development from SeongJae Park - adding online tuning of the feature and support for monitoring of fixed virtual address ranges. Also easier discovery of which monitoring operations are available. - Nadav Amit has done some optimization of TLB flushing during mprotect(). - Neil Brown continues to labor away at improving our swap-over-NFS support. - David Hildenbrand has some fixes to anon page COWing versus get_user_pages(). - Peng Liu fixed some errors in the core hugetlb code. - Joao Martins has reduced the amount of memory consumed by device-dax's compound devmaps. - Some cleanups of the arch-specific pagemap code from Anshuman Khandual. - Muchun Song has found and fixed some errors in the TLB flushing of transparent hugepages. - Roman Gushchin has done more work on the memcg selftests. ... and, of course, many smaller fixes and cleanups. Notably, the customary million cleanup serieses from Miaohe Lin" * tag 'mm-stable-2022-05-25' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (381 commits) mm: kfence: use PAGE_ALIGNED helper selftests: vm: add the "settings" file with timeout variable selftests: vm: add "test_hmm.sh" to TEST_FILES selftests: vm: check numa_available() before operating "merge_across_nodes" in ksm_tests selftests: vm: add migration to the .gitignore selftests/vm/pkeys: fix typo in comment ksm: fix typo in comment selftests: vm: add process_mrelease tests Revert "mm/vmscan: never demote for memcg reclaim" mm/kfence: print disabling or re-enabling message include/trace/events/percpu.h: cleanup for "percpu: improve percpu_alloc_percpu event trace" include/trace/events/mmflags.h: cleanup for "tracing: incorrect gfp_t conversion" mm: fix a potential infinite loop in start_isolate_page_range() MAINTAINERS: add Muchun as co-maintainer for HugeTLB zram: fix Kconfig dependency warning mm/shmem: fix shmem folio swapoff hang cgroup: fix an error handling path in alloc_pagecache_max_30M() mm: damon: use HPAGE_PMD_SIZE tracing: incorrect isolate_mote_t cast in mm_vmscan_lru_isolate nodemask.h: fix compilation error with GCC12 ...