linux-dev/tools/testing/selftests/vm/.gitignore, branch master

selftest: vm: remove deleted local_config.* from .gitignore

2022-09-12T03:26:10Z

Commit d2d6cba5d6623 ("selftest: vm: remove orphaned references to local_config.{h,mk}") took care of removing orphaned references. This commit removes local_config from .gitignore. Parent patch commit 69007f156ba ("Kselftests: remove support of libhugetlbfs from kselftests") Link: https://lkml.kernel.org/r/20220901092315.33619-1-tsahu@linux.ibm.com Signed-off-by: Tarun Sahu Reviewed-by: Axel Rasmussen Signed-off-by: Andrew Morton

selftests: vm: add migration to the .gitignore

2022-05-25T17:47:49Z

Add newly added migration test object to .gitignore file. Link: https://lkml.kernel.org/r/20220521094313.166505-1-usama.anjum@collabora.com Fixes: 0c2d08728470 ("mm: add selftests for migration entries") Signed-off-by: Muhammad Usama Anjum Reviewed-by: Alistair Popple Signed-off-by: Andrew Morton

selftests: vm: add process_mrelease tests

2022-05-25T17:47:48Z

Introduce process_mrelease syscall sanity tests which include tests which expect to fail: - process_mrelease with invalid pidfd and flags inputs - process_mrelease on a live process with no pending signals and valid process_mrelease usage which is expected to succeed. Because process_mrelease has to be used against a process with a pending SIGKILL, it's possible that the process exits before process_mrelease gets called. In such cases we retry the test with a victim that allocates twice more memory up to 1GB. This would require the victim process to spend more time during exit and process_mrelease has a better chance of catching the process before it exits and succeeding. On success the test reports the amount of memory the child had to allocate for reaping to succeed. Sample output: $ mrelease_test Success reaping a child with 1MB of memory allocations On failure the test reports the failure. Sample outputs: $ mrelease_test All process_mrelease attempts failed! $ mrelease_test process_mrelease: Invalid argument Link: https://lkml.kernel.org/r/20220518204316.13131-1-surenb@google.com Signed-off-by: Suren Baghdasaryan Reviewed-by: Shuah Khan Acked-by: Christian Brauner (Microsoft) Reviewed-by: Muhammad Usama Anjum Cc: Michal Hocko Cc: David Rientjes Cc: Matthew Wilcox (Oracle) Cc: Johannes Weiner Cc: Roman Gushchin Cc: Minchan Kim Cc: "Kirill A . Shutemov" Cc: Andrea Arcangeli Cc: Christoph Hellwig Cc: Oleg Nesterov Cc: David Hildenbrand Cc: Jann Horn Cc: Shakeel Butt Cc: Peter Xu Cc: John Hubbard Signed-off-by: Andrew Morton

selftests: vm: add test for Soft-Dirty PTE bit

2022-04-29T06:16:11Z

This introduces three tests: 1) Sanity check soft dirty basic semantics: allocate area, clean, dirty, check if the SD bit is flipped. 2) Check VMA reuse: validate the VM_SOFTDIRTY usage 3) Check soft-dirty on huge pages This was motivated by Will Deacon's fix commit 912efa17e512 ("mm: proc: Invalidate TLB after clearing soft-dirty page state"). I was tracking the same issue that he fixed, and this test would have caught it. Link: https://lkml.kernel.org/r/20220420084036.4101604-2-usama.anjum@collabora.com Signed-off-by: Gabriel Krisman Bertazi Signed-off-by: Muhammad Usama Anjum Co-developed-by: Muhammad Usama Anjum Cc: Will Deacon Cc: Shuah Khan Signed-off-by: Andrew Morton

selftests/vm: add hugetlb madvise MADV_DONTNEED MADV_REMOVE test

2022-03-25T02:06:50Z

Now that MADV_DONTNEED support for hugetlb is enabled, add corresponding tests. MADV_REMOVE has been enabled for some time, but no tests exist so add them as well. Link: https://lkml.kernel.org/r/20220215002348.128823-3-mike.kravetz@oracle.com Signed-off-by: Mike Kravetz Reviewed-by: Shuah Khan Cc: Andrea Arcangeli Cc: Axel Rasmussen Cc: David Hildenbrand Cc: Michal Hocko Cc: Mike Rapoport Cc: Mina Almasry Cc: Naoya Horiguchi Cc: Peter Xu Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

selftests: vm: add a hugetlb test case

2022-03-22T22:57:08Z

Since the head vmemmap page frame associated with each HugeTLB page is reused, we should hide the PG_head flag of tail struct page from the user. Add a tese case to check whether it is work properly. The test steps are as follows. 1) alloc 2MB hugeTLB 2) get each page frame 3) apply those APIs in each page frame 4) Those APIs work completely the same as before. Reading the flags of a page by /proc/kpageflags is done in stable_page_flags(), which has invoked PageHead(), PageTail(), PageCompound() and compound_head(). If those APIs work properly, the head page must have 15 and 17 bits set. And tail pages must have 16 and 17 bits set but 15 bit unset. Those flags are checked in check_page_flags(). Link: https://lkml.kernel.org/r/20211101031651.75851-5-songmuchun@bytedance.com Signed-off-by: Muchun Song Reviewed-by: Barry Song Cc: Bodeddula Balasubramaniam Cc: Chen Huang Cc: David Hildenbrand Cc: Fam Zheng Cc: Jonathan Corbet Cc: Matthew Wilcox Cc: Michal Hocko Cc: Mike Kravetz Cc: Oscar Salvador Cc: Qi Zheng Cc: Xiongchun Duan Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

mm, hugepages: add hugetlb vma mremap() test

2021-11-06T20:30:39Z

[almasrymina@google.com: v8] Link: https://lkml.kernel.org/r/20211014200542.4126947-2-almasrymina@google.com [wanjiabing@vivo.com: remove duplicated include in hugepage-mremap] Link: https://lkml.kernel.org/r/20211021122944.8857-1-wanjiabing@vivo.com Link: https://lkml.kernel.org/r/20211013195825.3058275-2-almasrymina@google.com Signed-off-by: Mina Almasry Signed-off-by: Wan Jiabing Acked-by: Mike Kravetz Cc: Ken Chen Cc: Chris Kennelly Cc: Michal Hocko Cc: Vlastimil Babka Cc: Kirill Shutemov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

selftests: vm: add KSM merge test

2021-09-03T16:58:18Z

Patch series "add KSM selftests". Introduce selftests to validate the functionality of KSM. The tests are run on private anonymous pages. Since some KSM tunables are modified, their starting values are saved and restored after testing. At the start, run is set to 2 to ensure that only test pages will be merged (we assume that no applications make madvise syscalls in the background). If KSM config not enabled, all tests will be skipped. This patch (of 4): Add check_ksm_merge() function to check the basic merging feature of KSM. First, some number of identical pages are allocated and the MADV_MERGEABLE advice is given to merge these pages. Then, pages_shared and pages_sharing values are compared with the expected numbers using assert_ksm_pages_count() function. The number of pages can be changed using -p option. Link: https://lkml.kernel.org/r/cover.1626252248.git.zhansayabagdaulet@gmail.com Link: https://lkml.kernel.org/r/90287685c13300972ea84de93d1f3f900373f9fe.1626252248.git.zhansayabagdaulet@gmail.com Signed-off-by: Zhansaya Bagdauletkyzy Reviewed-by: Pavel Tatashin Reviewed-by: Tyler Hicks Cc: Shuah Khan Cc: Hugh Dickins Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

secretmem: test: add basic selftest for memfd_secret(2)

2021-07-08T18:48:21Z

The test verifies that file descriptor created with memfd_secret does not allow read/write operations, that secret memory mappings respect RLIMIT_MEMLOCK and that remote accesses with process_vm_read() and ptrace() to the secret memory fail. Link: https://lkml.kernel.org/r/20210518072034.31572-8-rppt@kernel.org Signed-off-by: Mike Rapoport Acked-by: James Bottomley Cc: Alexander Viro Cc: Andy Lutomirski Cc: Arnd Bergmann Cc: Borislav Petkov Cc: Catalin Marinas Cc: Christopher Lameter Cc: Dan Williams Cc: Dave Hansen Cc: David Hildenbrand Cc: Elena Reshetova Cc: Hagen Paul Pfeifer Cc: "H. Peter Anvin" Cc: Ingo Molnar Cc: James Bottomley Cc: "Kirill A. Shutemov" Cc: Mark Rutland Cc: Matthew Wilcox Cc: Michael Kerrisk Cc: Palmer Dabbelt Cc: Palmer Dabbelt Cc: Paul Walmsley Cc: Peter Zijlstra Cc: Rick Edgecombe Cc: Roman Gushchin Cc: Shakeel Butt Cc: Shuah Khan Cc: Thomas Gleixner Cc: Tycho Andersen Cc: Will Deacon Cc: kernel test robot Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

selftests/vm: add test for MADV_POPULATE_(READ|WRITE)

2021-07-01T03:47:31Z

Let's add a simple test for MADV_POPULATE_READ and MADV_POPULATE_WRITE, verifying some error handling, that population works, and that softdirty tracking works as expected. For now, limit the test to private anonymous memory. Link: https://lkml.kernel.org/r/20210419135443.12822-6-david@redhat.com Signed-off-by: David Hildenbrand Cc: Arnd Bergmann Cc: Michal Hocko Cc: Oscar Salvador Cc: Matthew Wilcox (Oracle) Cc: Andrea Arcangeli Cc: Minchan Kim Cc: Jann Horn Cc: Jason Gunthorpe Cc: Dave Hansen Cc: Hugh Dickins Cc: Rik van Riel Cc: Michael S. Tsirkin Cc: Kirill A. Shutemov Cc: Vlastimil Babka Cc: Richard Henderson Cc: Ivan Kokshaysky Cc: Matt Turner Cc: Thomas Bogendoerfer Cc: "James E.J. Bottomley" Cc: Helge Deller Cc: Chris Zankel Cc: Max Filippov Cc: Mike Kravetz Cc: Peter Xu Cc: Rolf Eike Beer Cc: Shuah Khan Cc: Ram Pai Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds