It splits page cache folios to orders from 0 to 8 at different in-folio offset.
Signed-off-by: Zi Yan ziy@nvidia.com Cc: Baolin Wang baolin.wang@linux.alibaba.com Cc: David Hildenbrand david@redhat.com Cc: Hugh Dickins hughd@google.com Cc: John Hubbard jhubbard@nvidia.com Cc: Kefeng Wang wangkefeng.wang@huawei.com Cc: Kirill A. Shuemov kirill.shutemov@linux.intel.com Cc: Matthew Wilcox willy@infradead.org Cc: Miaohe Lin linmiaohe@huawei.com Cc: Ryan Roberts ryan.roberts@arm.com Cc: Yang Shi yang@os.amperecomputing.com Cc: Yu Zhao yuzhao@google.com Cc: Kairui Song kasong@tencent.com --- .../selftests/mm/split_huge_page_test.c | 34 +++++++++++++++---- 1 file changed, 27 insertions(+), 7 deletions(-)
diff --git a/tools/testing/selftests/mm/split_huge_page_test.c b/tools/testing/selftests/mm/split_huge_page_test.c index e0304046b1a0..719c5e2a6624 100644 --- a/tools/testing/selftests/mm/split_huge_page_test.c +++ b/tools/testing/selftests/mm/split_huge_page_test.c @@ -14,6 +14,7 @@ #include <fcntl.h> #include <sys/mman.h> #include <sys/mount.h> +#include <sys/param.h> #include <malloc.h> #include <stdbool.h> #include <time.h> @@ -456,7 +457,8 @@ int create_pagecache_thp_and_fd(const char *testfile, size_t fd_size, int *fd, return -1; }
-void split_thp_in_pagecache_to_order(size_t fd_size, int order, const char *fs_loc) +void split_thp_in_pagecache_to_order_at(size_t fd_size, const char *fs_loc, + int order, int offset) { int fd; char *addr; @@ -474,7 +476,12 @@ void split_thp_in_pagecache_to_order(size_t fd_size, int order, const char *fs_l return; err = 0;
- write_debugfs(PID_FMT, getpid(), (uint64_t)addr, (uint64_t)addr + fd_size, order); + if (offset == -1) + write_debugfs(PID_FMT, getpid(), (uint64_t)addr, + (uint64_t)addr + fd_size, order); + else + write_debugfs(PID_FMT, getpid(), (uint64_t)addr, + (uint64_t)addr + fd_size, order, offset);
for (i = 0; i < fd_size; i++) if (*(addr + i) != (char)i) { @@ -493,9 +500,15 @@ void split_thp_in_pagecache_to_order(size_t fd_size, int order, const char *fs_l munmap(addr, fd_size); close(fd); unlink(testfile); - if (err) - ksft_exit_fail_msg("Split PMD-mapped pagecache folio to order %d failed\n", order); - ksft_test_result_pass("Split PMD-mapped pagecache folio to order %d passed\n", order); + if (offset == -1) { + if (err) + ksft_exit_fail_msg("Split PMD-mapped pagecache folio to order %d failed\n", order); + ksft_test_result_pass("Split PMD-mapped pagecache folio to order %d passed\n", order); + } else { + if (err) + ksft_exit_fail_msg("Split PMD-mapped pagecache folio to order %d at in-folio offset %d failed\n", order, offset); + ksft_test_result_pass("Split PMD-mapped pagecache folio to order %d at in-folio offset %d passed\n", order, offset); + } }
int main(int argc, char **argv) @@ -506,6 +519,7 @@ int main(int argc, char **argv) char fs_loc_template[] = "/tmp/thp_fs_XXXXXX"; const char *fs_loc; bool created_tmp; + int offset;
ksft_print_header();
@@ -517,7 +531,7 @@ int main(int argc, char **argv) if (argc > 1) optional_xfs_path = argv[1];
- ksft_set_plan(1+8+1+9+9); + ksft_set_plan(1+8+1+9+9+8*4+2);
pagesize = getpagesize(); pageshift = ffs(pagesize) - 1; @@ -540,7 +554,13 @@ int main(int argc, char **argv) created_tmp = prepare_thp_fs(optional_xfs_path, fs_loc_template, &fs_loc); for (i = 8; i >= 0; i--) - split_thp_in_pagecache_to_order(fd_size, i, fs_loc); + split_thp_in_pagecache_to_order_at(fd_size, fs_loc, i, -1); + + for (i = 0; i < 9; i++) + for (offset = 0; + offset < pmd_pagesize / pagesize; + offset += MAX(pmd_pagesize / pagesize / 4, 1 << i)) + split_thp_in_pagecache_to_order_at(fd_size, fs_loc, i, offset); cleanup_thp_fs(fs_loc, created_tmp);
ksft_finished();