Messages in this thread | | | From | David Hildenbrand <> | Subject | [PATCH v1 0/7] selftests/vm: test COW handling of anonymous memory | Date | Tue, 27 Sep 2022 13:01:13 +0200 |
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On top of mm-stable.
This is my current set of tests for testing COW handling of anonymous memory, especially when interacting with GUP. I developed these tests while working on PageAnonExclusive and managed to clean them up just now.
On current upstream Linux, all tests pass except the hugetlb tests that rely on vmsplice -- these tests should pass as soon as vmsplice properly uses FOLL_PIN instead of FOLL_GET.
I'm working on additional tests for COW handling in private mappings, focusing on long-term R/O pinning e.g., of the shared zeropage, pagecache pages and KSM pages. These tests, however, will go into a different file. So this is everything I have regarding tests for anonymous memory.
Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Shuah Khan <shuah@kernel.org> Cc: Jason Gunthorpe <jgg@nvidia.com> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Nadav Amit <namit@vmware.com> Cc: Peter Xu <peterx@redhat.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Mike Rapoport <rppt@kernel.org> Cc: Christoph von Recklinghausen <crecklin@redhat.com> Cc: Don Dutile <ddutile@redhat.com>
David Hildenbrand (7): selftests/vm: anon_cow: test COW handling of anonymous memory selftests/vm: factor out pagemap_is_populated() into vm_util selftests/vm: anon_cow: THP tests selftests/vm: anon_cow: hugetlb tests selftests/vm: anon_cow: add liburing test cases mm/gup_test: start/stop/read functionality for PIN LONGTERM test selftests/vm: anon_cow: add R/O longterm tests via gup_test
mm/gup_test.c | 140 +++ mm/gup_test.h | 12 + tools/testing/selftests/vm/.gitignore | 1 + tools/testing/selftests/vm/Makefile | 25 +- tools/testing/selftests/vm/anon_cow.c | 1126 ++++++++++++++++++++ tools/testing/selftests/vm/check_config.sh | 31 + tools/testing/selftests/vm/madv_populate.c | 8 - tools/testing/selftests/vm/run_vmtests.sh | 3 + tools/testing/selftests/vm/vm_util.c | 15 + tools/testing/selftests/vm/vm_util.h | 2 + 10 files changed, 1353 insertions(+), 10 deletions(-) create mode 100644 tools/testing/selftests/vm/anon_cow.c create mode 100644 tools/testing/selftests/vm/check_config.sh
-- 2.37.3
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