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selftests/mm: pagemap_ioctl: use the correct page size for transact_test()

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There are several places in transact_test() where we use the hardcoded
0x1000 (4k) as page size, which is not always correct for architectures
supporting multiple page sizes.

Switch to use the correct page size.  Otherwise ./ksft_pagemap.sh on a
16k-page-size arm64 box fails with

 $ ./ksft_pagemap.sh
 [...]
 # ok 96 mprotect_tests Both pages written after remap and mprotect
 # ok 97 mprotect_tests Clear and make the pages written
 # Bail out! ioctl failed
 # # Planned tests != run tests (117 != 97)
 # # Totals: pass:97 fail:0 xfail:0 xpass:0 skip:0 error:0
 # [FAIL]
 not ok 1 pagemap_ioctl # exit=1
 # SUMMARY: PASS=0 SKIP=0 FAIL=1
 1..1

Link: https://lore.kernel.org/20260628101118.35861-1-zenghui.yu@linux.dev
Fixes: 46fd75d4a3 ("selftests: mm: add pagemap ioctl tests")
Signed-off-by: Zenghui Yu <zenghui.yu@linux.dev>
Cc: Muhammad Usama Anjum <usama.anjum@arm.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Zenghui Yu <zenghui.yu@linux.dev>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Zenghui Yu 2026-06-28 18:11:18 +08:00 committed by Andrew Morton
parent 81401cebfc
commit dccf636bf1
1 changed files with 6 additions and 6 deletions
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12
tools/testing/selftests/mm/pagemap_ioctl.c
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@ -1368,7 +1368,7 @@ void *thread_proc(void *mem)
ksft_exit_fail_msg("pthread_barrier_wait\n");
for (i = 0; i < access_per_thread; ++i)
__atomic_add_fetch(m + i * (0x1000 / sizeof(*m)), 1, __ATOMIC_SEQ_CST);
__atomic_add_fetch(m + i * (page_size / sizeof(*m)), 1, __ATOMIC_SEQ_CST);
ret = pthread_barrier_wait(&end_barrier);
if (ret && ret != PTHREAD_BARRIER_SERIAL_THREAD)
@ -1403,15 +1403,15 @@ static void transact_test(int page_size)
if (pthread_barrier_init(&end_barrier, NULL, nthreads + 1))
ksft_exit_fail_msg("pthread_barrier_init\n");
mem = mmap(NULL, 0x1000 * nthreads * pages_per_thread, PROT_READ | PROT_WRITE,
mem = mmap(NULL, page_size * nthreads * pages_per_thread, PROT_READ | PROT_WRITE,
MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
if (mem == MAP_FAILED)
ksft_exit_fail_msg("Error mmap %s.\n", strerror(errno));
wp_init(mem, 0x1000 * nthreads * pages_per_thread);
wp_addr_range(mem, 0x1000 * nthreads * pages_per_thread);
wp_init(mem, page_size * nthreads * pages_per_thread);
wp_addr_range(mem, page_size * nthreads * pages_per_thread);
memset(mem, 0, 0x1000 * nthreads * pages_per_thread);
memset(mem, 0, page_size * nthreads * pages_per_thread);
count = get_dirty_pages_reset(mem, nthreads * pages_per_thread, 1, page_size);
ksft_test_result(count > 0, "%s count %u\n", __func__, count);
@ -1420,7 +1420,7 @@ static void transact_test(int page_size)
finish = 0;
for (i = 0; i < nthreads; ++i)
pthread_create(&th, NULL, thread_proc, mem + 0x1000 * i * pages_per_thread);
pthread_create(&th, NULL, thread_proc, mem + page_size * i * pages_per_thread);
extra_pages = 0;
for (i = 0; i < iter_count; ++i) {