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selftests/mm: ensure uffd-wp-mremap gets pages of each size

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This test allocates a page of every available size and doesn't have any
SKIP logic if the allocation fails.  So, ensure it's available and skip
the test if we can't do so.

Link: https://lkml.kernel.org/r/20250311-mm-selftests-v4-10-dec210a658f5@google.com
Signed-off-by: Brendan Jackman <jackmanb@google.com>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Mateusz Guzik <mjguzik@gmail.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Brendan Jackman 2025-03-11 13:18:21 +00:00 committed by Andrew Morton
parent e9269b2cc4
commit f896c6de83
1 changed files with 22 additions and 1 deletions
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23
tools/testing/selftests/mm/run_vmtests.sh
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@ -325,9 +325,30 @@ CATEGORY="userfaultfd" run_test ${uffd_stress_bin} hugetlb "$half_ufd_size_MB" 3
CATEGORY="userfaultfd" run_test ${uffd_stress_bin} hugetlb-private "$half_ufd_size_MB" 32
CATEGORY="userfaultfd" run_test ${uffd_stress_bin} shmem 20 16
CATEGORY="userfaultfd" run_test ${uffd_stress_bin} shmem-private 20 16
CATEGORY="userfaultfd" run_test ./uffd-wp-mremap
# uffd-wp-mremap requires at least one page of each size.
have_all_size_hugepgs=true
declare -A nr_size_hugepgs
for f in /sys/kernel/mm/hugepages/**/nr_hugepages; do
old=$(cat $f)
nr_size_hugepgs["$f"]="$old"
if [ "$old" == 0 ]; then
echo 1 > "$f"
fi
if [ $(cat "$f") == 0 ]; then
have_all_size_hugepgs=false
break
fi
done
if $have_all_size_hugepgs; then
CATEGORY="userfaultfd" run_test ./uffd-wp-mremap
else
echo "# SKIP ./uffd-wp-mremap"
fi
#cleanup
for f in "${!nr_size_hugepgs[@]}"; do
echo "${nr_size_hugepgs["$f"]}" > "$f"
done
echo "$nr_hugepgs" > /proc/sys/vm/nr_hugepages
CATEGORY="compaction" run_test ./compaction_test