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selftests/mm: run_vmtests.sh: free memory if available memory is low

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Currently when running THP and HugeTLB tests, if HAVE_HUGEPAGES is set
run_test() drops caches, compacts memory and runs the test.  But if
HAVE_HUGEPAGES is not set it skips the tests entirely, even if THP tests
have nothing to do with HAVE_HUGEPAGES.

Replace the check if HAVE_HUGEPAGES is set with a check of how much memory
is available.  If there is less than 256 MB of available memory, drop
caches and run compaction and then continue to run a test regardless of
HAVE_HUGEPAGES value.

Link: https://lore.kernel.org/20260511162840.375890-55-rppt@kernel.org
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Tested-by: Luiz Capitulino <luizcap@redhat.com>
Tested-by: Sarthak Sharma <sarthak.sharma@arm.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Barry Song <baohua@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Donet Tom <donettom@linux.ibm.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Leon Romanovsky <leon@kernel.org>
Cc: Liam Howlett <liam@infradead.org>
Cc: Li Wang <li.wang@linux.dev>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Mark Brown <broonie@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Nico Pache <npache@redhat.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Mike Rapoport (Microsoft) 2026-05-11 19:28:38 +03:00 committed by Andrew Morton
parent e8a83b3a12
commit 157adc22f0
1 changed files with 6 additions and 12 deletions
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18
tools/testing/selftests/mm/run_vmtests.sh
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@ -234,19 +234,17 @@ pretty_name() {
# Usage: run_test [test binary] [arbitrary test arguments...]
run_test() {
if test_selected ${CATEGORY}; then
local skip=0
# On memory constrainted systems some tests can fail to allocate hugepages.
# perform some cleanup before the test for a higher success rate.
if [ ${CATEGORY} == "thp" -o ${CATEGORY} == "hugetlb" ]; then
if [ "${HAVE_HUGEPAGES}" = "1" ]; then
mem_kb=$(awk '/MemAvailable/ {print $2}' /proc/meminfo)
mem_Mb=$((mem_kb / 1024))
if (( $mem_Mb < 256 )); then
echo 3 > /proc/sys/vm/drop_caches
sleep 2
echo 1 > /proc/sys/vm/compact_memory
sleep 2
else
echo "hugepages not supported" | tap_prefix
skip=1
fi
fi
@ -255,12 +253,8 @@ run_test() {
local sep=$(echo -n "$title" | tr "[:graph:][:space:]" -)
printf "%s\n%s\n%s\n" "$sep" "$title" "$sep" | tap_prefix
if [ "${skip}" != "1" ]; then
("$@" 2>&1) | tap_prefix
local ret=${PIPESTATUS[0]}
else
local ret=$ksft_skip
fi
("$@" 2>&1) | tap_prefix
local ret=${PIPESTATUS[0]}
count_total=$(( count_total + 1 ))
if [ $ret -eq 0 ]; then
count_pass=$(( count_pass + 1 ))