Commit f896c6de authored by Brendan Jackman's avatar Brendan Jackman Committed by Andrew Morton
Browse files

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

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: default avatarBrendan 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: default avatarAndrew Morton <akpm@linux-foundation.org>
parent e9269b2c

tools/testing/selftests/mm/run_vmtests.sh

+22 −1
Original line number Diff line number Diff line
@@ -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

# 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