The patch titled
Subject: selftests/mm: fix thuge-gen test bugs
has been added to the -mm mm-unstable branch. Its filename is
selftests-mm-fix-thuge-gen-test-bugs.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/selftests-mm-fix-thuge-gen-test-bugs.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Ryan Roberts <ryan.roberts@xxxxxxx>
Subject: selftests/mm: fix thuge-gen test bugs
Date: Mon, 24 Jul 2023 09:25:18 +0100
thuge-gen was previously only munmapping part of the mmapped buffer, which
caused us to run out of 1G huge pages for a later part of the test. Fix
this by munmapping the whole buffer. Based on the code, it looks like a
typo rather than an intention to keep some of the buffer mapped.
thuge-gen was also calling mmap with SHM_HUGETLB flag (bit 11 set), which
is actually MAP_DENYWRITE in mmap context. The man page says this flag is
ignored in modern kernels. I'm pretty sure from the context that the
author intended to pass the MAP_HUGETLB flag so I've fixed that up too.
Link: https://lkml.kernel.org/r/20230724082522.1202616-5-ryan.roberts@xxxxxxx
Signed-off-by: Ryan Roberts <ryan.roberts@xxxxxxx>
Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
Cc: Florent Revest <revest@xxxxxxxxxxxx>
Cc: Jérôme Glisse <jglisse@xxxxxxxxxx>
Cc: John Hubbard <jhubbard@xxxxxxxxxx>
Cc: Mark Brown <broonie@xxxxxxxxxx>
Cc: Peter Xu <peterx@xxxxxxxxxx>
Cc: Shuah Khan <shuah@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
tools/testing/selftests/mm/thuge-gen.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/tools/testing/selftests/mm/thuge-gen.c~selftests-mm-fix-thuge-gen-test-bugs
+++ a/tools/testing/selftests/mm/thuge-gen.c
@@ -139,7 +139,7 @@ void test_mmap(unsigned long size, unsig
before, after, before - after, size);
assert(size == getpagesize() || (before - after) == NUM_PAGES);
show(size);
- err = munmap(map, size);
+ err = munmap(map, size * NUM_PAGES);
assert(!err);
}
@@ -222,7 +222,7 @@ int main(void)
test_mmap(ps, MAP_HUGETLB | arg);
}
printf("Testing default huge mmap\n");
- test_mmap(default_hps, SHM_HUGETLB);
+ test_mmap(default_hps, MAP_HUGETLB);
puts("Testing non-huge shmget");
test_shmget(getpagesize(), 0);
_
Patches currently in -mm which might be from ryan.roberts@xxxxxxx are
mm-allow-deferred-splitting-of-arbitrary-large-anon-folios.patch
mm-implement-folio_remove_rmap_range.patch
mm-batch-zap-large-anonymous-folio-pte-mappings.patch
selftests-line-buffer-test-programs-stdout.patch
selftests-mm-skip-soft-dirty-tests-on-arm64.patch
selftests-mm-enable-mrelease_test-for-arm64.patch
selftests-mm-fix-thuge-gen-test-bugs.patch
selftests-mm-va_high_addr_switch-should-skip-unsupported-arm64-configs.patch
selftests-mm-make-migration-test-robust-to-failure.patch
selftests-mm-optionally-pass-duration-to-transhuge-stress.patch
selftests-mm-run-all-tests-from-run_vmtestssh.patch
