kvm/selftests/memslots_perf_test doesn't work with 64KB-page-size-host and 4KB-page-size-guest on aarch64. In the implementation, the host and guest page size have been hardcoded to 4KB. It's ovbiously not working on aarch64 which supports 4KB, 16KB, 64KB individually on host and guest. This series tries to fix it. After the series is applied, the test runs successfully with 64KB-page-size-host and 4KB-page-size-guest. # ./memslots_perf_tests -v -s 512 Since we're here, the code is cleaned up a bit as PATCH[1-3] do. The other patches are fixes to handle the mismatched host/guest page sized. v1: https://lore.kernel.org/kvmarm/20221014071914.227134-1-gshan@xxxxxxxxxx/T/#t v2: https://lore.kernel.org/kvmarm/20221018040454.405719-1-gshan@xxxxxxxxxx/T/#t Changelog ========= v3: * Improved comments about MEM_TEST_MOVE_SIZE, which is set to 64KB in PATCH[v3 4/6] and finally fixed to 192KB in PATCH[v3 5/6]. (Maciej) * Use size instead of pages to do the comparison in test_memslot_move_prepare() (Maciej) * Use tools/include/linux/sizes.h instead of inventing our own macros. (Oliver) v2: * Pick the smaller value between the ones specified by user or probed from KVM_CAP_NR_MEMSLOTS in PATCH[v2 3/6] (Maciej) * Improved comments about MEM_TEST_MOVE_SIZE in PATCH[v2 4/6] (Maciej) * Avoid mismatched guest page size after VM is started in prepare_vm() in PATCH[v2 4/6] (Maciej) * Fix condition to check MEM_TEST_{UNMAP, UNMAP_CHUNK}_SIZE in check_memory_size() in PATCH[v2 4/6] (Maciej) * Define base and huge page size in kvm_util_base.h in PATCH[v2 5/6] (Sean) * Add checks on host/guest page size in check_memory_size() and fail early if any of them exceeds 64KB in PATCH[v2 5/6] (Maciej) Gavin Shan (6): KVM: selftests: memslot_perf_test: Use data->nslots in prepare_vm() KVM: selftests: memslot_perf_test: Consolidate loop conditions in prepare_vm() KVM: selftests: memslot_perf_test: Probe memory slots for once KVM: selftests: memslot_perf_test: Support variable guest page size KVM: selftests: memslot_perf_test: Consolidate memory KVM: selftests: memslot_perf_test: Report optimal memory slots .../testing/selftests/kvm/memslot_perf_test.c | 317 ++++++++++++------ 1 file changed, 208 insertions(+), 109 deletions(-) -- 2.23.0
