Commit ff4ef2fb authored Feb 06, 2026 by Miaohe Lin Committed by Andrew Morton Feb 12, 2026

selftests/mm: add memory failure anonymous page test

Patch series "selftests/mm: add memory failure selftests", v4.

Introduce selftests to validate the functionality of memory failure. 
These tests help ensure that memory failure handling for anonymous pages,
pagecaches pages works correctly, including proper SIGBUS delivery to user
processes, page isolation, and recovery paths.

Currently madvise syscall is used to inject memory failures.  And only
anonymous pages and pagecaches are tested.  More test scenarios, e.g. 
hugetlb, shmem, thp, will be added.  Also more memory failure injecting
methods will be supported, e.g.  APEI Error INJection, if required.


This patch (of 3):

This patch adds a new kselftest to validate memory failure handling for
anonymous pages. The test performs the following operations:
1. Allocates anonymous pages using mmap().
2. Injects memory failure via madvise syscall.
3. Verifies expected error handling behavior.
4. Unpoison memory.

This test helps ensure that memory failure handling for anonymous pages
works correctly, including proper SIGBUS delivery to user processes, page
isolation and recovery paths.

Link: https://lkml.kernel.org/r/20260206031639.2707102-1-linmiaohe@huawei.com
Link: https://lkml.kernel.org/r/20260206031639.2707102-2-linmiaohe@huawei.com


Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Naoya Horiguchi <nao.horiguchi@gmail.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: kernel test robot <lkp@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

parent a67fe41e

MAINTAINERS

+1 −0

Original line number	Diff line number	Diff line
		@@ -11691,6 +11691,7 @@ F: include/linux/memory-failure.h
		F: include/trace/events/memory-failure.h
		F: mm/hwpoison-inject.c
		F: mm/memory-failure.c
		F: tools/testing/selftests/mm/memory-failure.c

		HYCON HY46XX TOUCHSCREEN SUPPORT
		M: Giulio Benetti <giulio.benetti@benettiengineering.com>

tools/testing/selftests/mm/.gitignore

+1 −0

Original line number	Diff line number	Diff line
		@@ -12,6 +12,7 @@ map_hugetlb
		map_populate
		thuge-gen
		compaction_test
		memory-failure
		migration
		mlock2-tests
		mrelease_test

tools/testing/selftests/mm/Makefile

+2 −0

Original line number	Diff line number	Diff line
		@@ -75,6 +75,7 @@ TEST_GEN_FILES += map_populate
		ifneq (,$(filter $(ARCH),arm64 riscv riscv64 x86 x86_64))
		TEST_GEN_FILES += memfd_secret
		endif
		TEST_GEN_FILES += memory-failure
		TEST_GEN_FILES += migration
		TEST_GEN_FILES += mkdirty
		TEST_GEN_FILES += mlock-random-test
		@@ -154,6 +155,7 @@ TEST_PROGS += ksft_ksm_numa.sh
		TEST_PROGS += ksft_madv_guard.sh
		TEST_PROGS += ksft_madv_populate.sh
		TEST_PROGS += ksft_memfd_secret.sh
		TEST_PROGS += ksft_memory_failure.sh
		TEST_PROGS += ksft_migration.sh
		TEST_PROGS += ksft_mkdirty.sh
		TEST_PROGS += ksft_mlock.sh

tools/testing/selftests/mm/config

+2 −0

Original line number	Diff line number	Diff line
		@@ -11,3 +11,5 @@ CONFIG_ANON_VMA_NAME=y
		CONFIG_FTRACE=y
		CONFIG_PROFILING=y
		CONFIG_UPROBES=y
		CONFIG_MEMORY_FAILURE=y
		CONFIG_HWPOISON_INJECT=m

tools/testing/selftests/mm/ksft_memory_failure.sh

0 → 100755

+4 −0

Original line number	Diff line number	Diff line
		#!/bin/sh -e
		# SPDX-License-Identifier: GPL-2.0

		./run_vmtests.sh -t memory-failure