Hongfu Li 4050b5b0b6 selftests/mm: fix read_file() return value check ...

read_file() returns 0 on open/read failures and never returns negative
values.  Existing < 0 error checks never trigger, so read failures are
silently ignored.  Check for zero return to detect read_file() failures.

Also fix misleading error message in get_finfo().  The error string
incorrectly references read_num when reading uevent files.

Link: https://lore.kernel.org/20260807013555.36525-1-hongfu.li@linux.dev
Fixes: e0c13f9761 ("khugepaged: add self test")
Signed-off-by: Hongfu Li <lihongfu@kylinos.cn>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Barry Song <baohua@kernel.org>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Lance Yang <lance.yang@linux.dev>
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: Ryan Roberts <ryan.roberts@arm.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

2026-08-24 18:43:11 -07:00

..

page_frag

mm/page_frag: reject invalid CPUs in page_frag_test

2026-06-21 11:37:37 -07:00

.gitignore

selftests/mm: use pattern matching in .gitignore

2026-08-24 18:43:02 -07:00

charge_reserved_hugetlb.sh

selftests/mm: fix hugetlb pathname construction in charge_reserved_hugetlb.sh

2026-06-21 11:37:32 -07:00

check_config.sh

selftests/mm: rename local_config.h to local_config.h_gen

2026-08-24 18:43:01 -07:00

compaction_test.c

selftests/mm: read memory information without popen

2026-08-24 18:43:01 -07:00

config

selftests/mm: specify requirement for PROC_MEM_ALWAYS_FORCE=y

2026-04-27 05:54:26 -07:00

cow.c

selftests/mm: skip COW tmpfile cases when fallocate() is unsupported

2026-08-24 18:43:09 -07:00

droppable.c

selftests: mm: fix and speedup "droppable" test

2026-06-21 11:37:36 -07:00

folio_split_race_test.c

selftests: mm: extend the check_huge() to support mTHP check

2026-08-24 18:43:07 -07:00

guard-regions.c

selftests/mm: skip guard hole-punch test if MADV_REMOVE is unsupported

2026-08-24 18:43:09 -07:00

gup_longterm.c

selftests/mm: rename local_config.h to local_config.h_gen

2026-08-24 18:43:01 -07:00

gup_test.c

selftests/mm: gup_test: add setup of HugeTLB pages

2026-06-21 11:37:26 -07:00

hmm-tests.c

selftests/mm: factor out hmm_buffer_alloc() to consolidate buffer setup

2026-08-06 18:56:56 -07:00

hugepage_settings.c

selftests/mm: handle EINVAL when configuring gigantic hugepages

2026-08-04 19:18:47 -07:00

hugepage_settings.h

selftests/mm: move read_file(), read_num() and write_num() to vm_util

2026-06-21 11:37:24 -07:00

hugetlb_dio.c

selftests/mm: hugepage_dio: add setup of HugeTLB pages

2026-06-21 11:37:26 -07:00

hugetlb_fault_after_madv.c

selftests/mm: hugetlb_fault_after_madv: add setup of HugeTLB pages

2026-06-21 11:37:26 -07:00

hugetlb_madv_vs_map.c

selftests/mm: hugetlb_madv_vs_map: add setup of HugeTLB pages

2026-06-21 11:37:27 -07:00

hugetlb_reparenting_test.sh

selftests/mm: fix cgroup task placement and drop memory.current checks in hugetlb_reparenting_test.sh

2026-06-21 11:37:33 -07:00

hugetlb-madvise.c

selftests/mm: hugetlb-madvise: add setup of HugeTLB pages

2026-06-21 11:37:27 -07:00

hugetlb-mmap.c

selftests/mm: hugetlb-mmap: add setup of HugeTLB pages

2026-06-21 11:37:27 -07:00

hugetlb-mremap.c

selftests/mm: ensure destination is hugetlb-backed in hugetlb-mremap

2026-06-21 11:37:34 -07:00

hugetlb-read-hwpoison.c

selftests/mm: hugetlb-read-hwpoison: use kselftest framework

2026-06-21 11:37:20 -07:00

hugetlb-shm.c

selftests/mm: hugetlb-shm: add setup of HugeTLB pages

2026-06-21 11:37:28 -07:00

hugetlb-soft-offline.c

selftests/mm: hugetlb-soft-offline: add setup of HugeTLB pages

2026-06-21 11:37:28 -07:00

khugepaged.c

selftests/mm: fix read_file() return value check

2026-08-24 18:43:11 -07:00

ksft_compaction.sh

selftests/mm: have the harness run each test category separately

2026-01-31 14:22:53 -08:00

ksft_cow.sh

selftests/mm: have the harness run each test category separately

2026-01-31 14:22:53 -08:00

ksft_gup_test.sh

selftests/mm: have the harness run each test category separately

2026-01-31 14:22:53 -08:00

ksft_hmm.sh

selftests/mm: have the harness run each test category separately

2026-01-31 14:22:53 -08:00

ksft_hugetlb.sh

selftests/mm: have the harness run each test category separately

2026-01-31 14:22:53 -08:00

ksft_hugevm.sh

selftests/mm: have the harness run each test category separately

2026-01-31 14:22:53 -08:00

ksft_kmemleak_dedup.sh

selftests/mm: add kmemleak verbose dedup test

2026-05-28 21:05:09 -07:00

ksft_ksm_numa.sh

selftests/mm: have the harness run each test category separately

2026-01-31 14:22:53 -08:00

ksft_ksm.sh

selftests/mm: have the harness run each test category separately

2026-01-31 14:22:53 -08:00

ksft_madv_guard.sh

selftests/mm: have the harness run each test category separately

2026-01-31 14:22:53 -08:00

ksft_madv_populate.sh

selftests/mm: have the harness run each test category separately

2026-01-31 14:22:53 -08:00

ksft_mdwe.sh

selftests/mm: have the harness run each test category separately

2026-01-31 14:22:53 -08:00

ksft_memfd_secret.sh

selftests/mm: have the harness run each test category separately

2026-01-31 14:22:53 -08:00

ksft_memory_failure.sh

selftests/mm: add memory failure anonymous page test

2026-02-12 15:43:01 -08:00

ksft_migration.sh

selftests/mm: have the harness run each test category separately

2026-01-31 14:22:53 -08:00

ksft_mkdirty.sh

selftests/mm: have the harness run each test category separately

2026-01-31 14:22:53 -08:00

ksft_mlock.sh

selftests/mm: have the harness run each test category separately

2026-01-31 14:22:53 -08:00

ksft_mmap.sh

selftests/mm: have the harness run each test category separately

2026-01-31 14:22:53 -08:00

ksft_mremap.sh

selftests/mm: have the harness run each test category separately

2026-01-31 14:22:53 -08:00

ksft_page_frag.sh

selftests/mm: have the harness run each test category separately

2026-01-31 14:22:53 -08:00

ksft_pagemap.sh

selftests/mm: have the harness run each test category separately

2026-01-31 14:22:53 -08:00

ksft_pfnmap.sh

selftests/mm: have the harness run each test category separately

2026-01-31 14:22:53 -08:00

ksft_pkey.sh

selftests/mm: have the harness run each test category separately

2026-01-31 14:22:53 -08:00

ksft_process_madv.sh

selftests/mm: fix ksft_process_madv.sh test category

2026-07-01 19:02:52 -07:00

ksft_process_mrelease.sh

selftests/mm: have the harness run each test category separately

2026-01-31 14:22:53 -08:00

ksft_rmap.sh

selftests/mm: have the harness run each test category separately

2026-01-31 14:22:53 -08:00

ksft_soft_dirty.sh

selftests/mm: have the harness run each test category separately

2026-01-31 14:22:53 -08:00

ksft_thp.sh

selftests/mm: have the harness run each test category separately

2026-01-31 14:22:53 -08:00

ksft_userfaultfd.sh

selftests/mm: have the harness run each test category separately

2026-01-31 14:22:53 -08:00

ksft_vma_merge.sh

selftests/mm: have the harness run each test category separately

2026-01-31 14:22:53 -08:00

ksft_vmalloc.sh

selftests/mm: have the harness run each test category separately

2026-01-31 14:22:53 -08:00

ksm_functional_tests.c

selftests/mm: ksm-functional-tests: fix partial write handling

2026-06-02 15:22:15 -07:00

ksm_tests.c

selftests/mm: fix ternary operator precedence in ksm_tests

2026-08-04 19:18:48 -07:00

madv_populate.c

selftests/mm: fix incorrect mmap() error handling with NULL instead of MAP_FAILED

2026-06-21 11:37:31 -07:00

Makefile

selftests/mm: rename local_config.h to local_config.h_gen

2026-08-24 18:43:01 -07:00

map_fixed_noreplace.c

selftests: complete kselftest include centralization

2025-11-27 14:24:31 -08:00

map_populate.c

selftests: complete kselftest include centralization

2025-11-27 14:24:31 -08:00

mdwe_test.c

selftests: complete kselftest include centralization

2025-11-27 14:24:31 -08:00

memfd_secret.c

selftests: complete kselftest include centralization

2025-11-27 14:24:31 -08:00

memory-failure.c

selftests/mm: skip hard dirty page-cache test on NFS

2026-08-24 18:43:09 -07:00

merge.c

tools/testing/selftests/mm: test anonymous page offset merge behaviour

2026-08-24 18:42:54 -07:00

migration.c

selftests/mm: retry migration failures for the full runtime

2026-08-24 18:43:10 -07:00

mkdirty.c

selftests: complete kselftest include centralization

2025-11-27 14:24:31 -08:00

mlock2-tests.c

selftests/mm: verify droppable mappings cannot be locked

2026-05-28 21:04:48 -07:00

mlock2.h

selftests/mm/mlock: print error on failure

2025-03-16 22:06:40 -07:00

mlock-random-test.c

selftests/mm: fix potential wild pointer access of getline due to missing init

2026-07-28 17:37:34 -07:00

mrelease_test.c

selftests: complete kselftest include centralization

2025-11-27 14:24:31 -08:00

mremap_dontunmap.c

selftests/mm: fix BUG_ON checking wrong variable in mremap_dontunmap

2026-08-06 18:57:14 -07:00

mremap_test.c

selftests/mm: simplify byte pattern checking in mremap_test

2026-05-28 21:04:53 -07:00

mseal_helpers.h

selftests/mm: mseal, self_elf: rename TEST_END_CHECK to REPORT_TEST_PASS

2024-07-03 19:30:07 -07:00

mseal_test.c

selftests/mm: drop duplicate test_seal_mprotect_two_vma_with_gap() call

2026-08-24 18:43:08 -07:00

on-fault-limit.c

selftests: complete kselftest include centralization

2025-11-27 14:24:31 -08:00

pagemap_ioctl.c

selftests: mm: extend the check_huge() to support mTHP check

2026-08-24 18:43:07 -07:00

pfnmap.c

selftests/mm: report SKIP in pfnmap if a check fails

2026-01-31 14:22:42 -08:00

pkey_sighandler_tests.c

selftests/mm: fix clone cleartid race in pkey sighandler tests

2026-07-30 19:40:30 -07:00

pkey_util.c

selftests/mm: move pkey selftest helpers to pkey_util.c

2026-07-30 19:40:29 -07:00

pkey-arm64.h

selftests/mm: Fix resv_sz when parsing arm64 signal frame

2026-05-19 11:54:03 +01:00

pkey-helpers.h

selftests/mm: move pkey selftest helpers to pkey_util.c

2026-07-30 19:40:29 -07:00

pkey-powerpc.h

selftests/mm: add missing mmap() return checks in pkey tests

2026-07-30 19:40:30 -07:00

pkey-x86.h

selftests/mm: ensure pkey-*.h define inline functions only

2025-01-13 22:40:55 -08:00

prctl_thp_disable.c

selftests: mm: extend the check_huge() to support mTHP check

2026-08-24 18:43:07 -07:00

process_madv.c

mm/madvise: reject invalid process_madvise() advice for zero-length vectors

2026-05-28 21:04:57 -07:00

protection_keys.c

selftests/mm: add missing mmap() return checks in pkey tests

2026-07-30 19:40:30 -07:00

rmap.c

ksm: add mremap selftests for ksm_rmap_walk

2026-08-04 19:18:45 -07:00

run_vmtests.sh

selftests: mm: add mTHP collapse test cases

2026-08-24 18:43:07 -07:00

settings

selftests/mm: increase timeout from 180 to 900 seconds

2025-06-19 20:48:01 -07:00

soft-dirty.c

selftests: mm: extend the check_huge() to support mTHP check

2026-08-24 18:43:07 -07:00

split_huge_page_test.c

selftests: mm: move gather_after_split_folio_orders() into vm_util.c file

2026-08-24 18:43:07 -07:00

test_hmm.sh

selftests/mm: give scripts execute permission

2023-07-14 09:24:31 -07:00

test_page_frag.sh

mm: page_frag: add a test module for page_frag

2024-11-11 10:56:26 -08:00

test_vmalloc.sh

lib/test_vmalloc.c: minor fixes to test_vmalloc.c

2026-01-20 19:24:47 -08:00

thuge-gen.c

selftests/mm: thuge-gen: fix test_shmget() for PAGE_SIZE check

2026-08-15 21:12:24 -07:00

transhuge-stress.c

selftests/mm: rename thp_settings.[ch] to hugepage_settings.[ch]

2026-06-21 11:37:23 -07:00

uffd-common.c

selftests: mm: extend the check_huge() to support mTHP check

2026-08-24 18:43:07 -07:00

uffd-common.h

selftests/mm: move HugeTLB helpers to hugepage_settings

2026-06-21 11:37:23 -07:00

uffd-stress.c

selftests/mm: skip uffd-stress test when nr_pages_per_cpu is zero

2026-06-21 11:37:34 -07:00

uffd-unit-tests.c

selftests/mm: add userfaultfd RWP tests

2026-08-04 19:18:39 -07:00

uffd-wp-mremap.c

selftests/mm: skip uffd-wp-mremap if UFFD write-protect is unsupported

2026-06-21 11:37:34 -07:00

va_high_addr_switch.c

selftests/mm: va_high_addr_switch: add setup of HugeTLB pages

2026-06-21 11:37:30 -07:00

va_high_addr_switch.sh

selftests/mm: va_high_addr_switch.sh: drop huge pages setup

2026-06-21 11:37:30 -07:00

vm_util.c

selftests/mm: fix read_file() return value check

2026-08-24 18:43:11 -07:00

vm_util.h

selftests: mm: move gather_after_split_folio_orders() into vm_util.c file

2026-08-24 18:43:07 -07:00

write_hugetlb_memory.sh

selftests/mm: switch to bash from sh

2024-01-25 23:52:20 -08:00

write_to_hugetlbfs.c

selftests/mm/write_to_hugetlbfs: parse -s as size_t

2026-01-20 19:24:50 -08:00