linux-kernel - [PATCH 0/1] selftest/mm/hugetlb: SIGBUS on stolen page

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Message-Id: <20240105155419.1939484-1-leitao@debian.org>
Date: Fri,  5 Jan 2024 07:54:18 -0800
From: Breno Leitao <leitao@...ian.org>
To: riel@...riel.com,
	linux-mm@...ck.org,
	akpm@...ux-foundation.org
Cc: vegard.nossum@...cle.com,
	rppt@...nel.org,
	songmuchun@...edance.com,
	shy828301@...il.com,
	linux-kselftest@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 0/1] selftest/mm/hugetlb: SIGBUS on stolen page

This test case triggers a race between madvise(MADV_DONTNEED) and
mmap() in a single huge page, which got stolen (while reserved).

Once the only page is stolen, the memory previously mmaped (and
madvise(MADV_DONTNEED) got a SIGBUS when accessed.

I am not adding this test to the un_vmtests.sh scripts, since this test
fails at upstream.

Breno Leitao (1):
  selftests/mm: add a new test for madv and hugetlb mmap

 tools/testing/selftests/mm/.gitignore         |   1 +
 tools/testing/selftests/mm/Makefile           |   1 +
 .../selftests/mm/hugetlb_madv_vs_map.c        | 124 ++++++++++++++++++
 3 files changed, 126 insertions(+)
 create mode 100644 tools/testing/selftests/mm/hugetlb_madv_vs_map.c

-- 
2.34.1