kernel/linux.git/tools/testing/selftests/cgroup, branch v6.1.168

selftests: cgroup: fix unexpected failure on test_memcg_low

2023-07-19T14:21:08+00:00

[ Upstream commit 19ab365762c6cc39dfdee9e13ab0d12fe4b5540d ] Since commit f079a020ba95 ("selftests: memcg: factor out common parts of memory.{low,min} tests"), the value used in second alloc_anon has changed from 148M to 170M. Because memory.low allows reclaiming page cache in child cgroups, so the memory.current is close to 30M instead of 50M. Therefore, adjust the expected value of parent cgroup. Link: https://lkml.kernel.org/r/20230522095233.4246-2-haifeng.xu@shopee.com Fixes: f079a020ba95 ("selftests: memcg: factor out common parts of memory.{low,min} tests") Signed-off-by: Haifeng Xu Cc: Johannes Weiner Cc: Michal Hocko Cc: Roman Gushchin Cc: Shakeel Butt Signed-off-by: Andrew Morton Signed-off-by: Sasha Levin

selftests: cgroup: Add 'malloc' failures checks in test_memcontrol

2023-05-24T16:32:33+00:00

[ Upstream commit c83f320e55a49abd90629f42a72897afd579e0de ] There are several 'malloc' calls in test_memcontrol, which can be unsuccessful. This patch will add 'malloc' failures checking to give more details about test's fail reasons and avoid possible undefined behavior during the future null dereference (like the one in alloc_anon_50M_check_swap function). Signed-off-by: Ivan Orlov Reviewed-by: Muchun Song Acked-by: Shakeel Butt Acked-by: Roman Gushchin Signed-off-by: Shuah Khan Signed-off-by: Sasha Levin

cgroup/cpuset: Fix wrong check in update_parent_subparts_cpumask()

2023-02-09T10:28:15+00:00

commit e5ae8803847b80fe9d744a3174abe2b7bfed222a upstream. It was found that the check to see if a partition could use up all the cpus from the parent cpuset in update_parent_subparts_cpumask() was incorrect. As a result, it is possible to leave parent with no effective cpu left even if there are tasks in the parent cpuset. This can lead to system panic as reported in [1]. Fix this probem by updating the check to fail the enabling the partition if parent's effective_cpus is a subset of the child's cpus_allowed. Also record the error code when an error happens in update_prstate() and add a test case where parent partition and child have the same cpu list and parent has task. Enabling partition in the child will fail in this case. [1] https://www.spinics.net/lists/cgroups/msg36254.html Fixes: f0af1bfc27b5 ("cgroup/cpuset: Relax constraints to partition & cpus changes") Cc: stable@vger.kernel.org # v6.1 Reported-by: Srinivas Pandruvada Signed-off-by: Waiman Long Signed-off-by: Tejun Heo Signed-off-by: Greg Kroah-Hartman

selftests: cgroup: fix unsigned comparison with less than zero

2022-12-31T12:31:56+00:00

[ Upstream commit 333d073dee3a6865171d43e3b0a9ff688bff5891 ] 'size' is unsigned, it never less than zero. Link: https://lkml.kernel.org/r/20221105110611.28920-1-yuehaibing@huawei.com Fixes: 6c26df84e1f2 ("selftests: cgroup: return -errno from cg_read()/cg_write() on failure") Signed-off-by: YueHaibing Reviewed-by: Yosry Ahmed Acked-by: Roman Gushchin Reviewed-by: Kamalesh Babulal Cc: David Rientjes Cc: Johannes Weiner Cc: Shakeel Butt Cc: Shuah Khan Cc: Tejun Heo Cc: zefan li Signed-off-by: Andrew Morton Signed-off-by: Sasha Levin

kselftests: cgroup: update kmem test precision tolerance

2022-12-10T02:41:16+00:00

1813e51eece0 ("memcg: increase MEMCG_CHARGE_BATCH to 64") has changed the batch size while this test case has been left behind. This has led to a test failure reported by test bot: not ok 2 selftests: cgroup: test_kmem # exit=1 Update the tolerance for the pcp charges to reflect the MEMCG_CHARGE_BATCH change to fix this. [akpm@linux-foundation.org: update comments, per Roman] Link: https://lkml.kernel.org/r/Y4m8Unt6FhWKC6IH@dhcp22.suse.cz Fixes: 1813e51eece0a ("memcg: increase MEMCG_CHARGE_BATCH to 64") Signed-off-by: Michal Hocko Reported-by: kernel test robot Link: https://lore.kernel.org/oe-lkp/202212010958.c1053bd3-yujie.liu@intel.com Acked-by: Shakeel Butt Acked-by: Roman Gushchin Tested-by: Yujie Liu Cc: Eric Dumazet Cc: Feng Tang Cc: Johannes Weiner Cc: "Michal Koutný" Cc: Muchun Song Cc: Soheil Hassas Yeganeh Signed-off-by: Andrew Morton

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

2022-10-11T00:53:04+00:00

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

2022-10-03T21:03:36+00:00

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

2022-09-04T20:47:28+00:00

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

2022-05-27T18:40:49+00:00

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

2022-05-27T16:33:45+00:00

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