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Howlett" , Lance Yang , Leon Romanovsky , Lorenzo Stoakes , Mark Brown , Michal Hocko , Mike Rapoport , Nico Pache , Peter Xu , Ryan Roberts , Shuah Khan , Suren Baghdasaryan , Vlastimil Babka , Zi Yan , linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 53/53] selftests/mm: run_vmtests.sh: drop detection and setup of HugeTLB Date: Mon, 6 Apr 2026 17:17:35 +0300 Message-ID: <20260406141735.2179309-54-rppt@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260406141735.2179309-1-rppt@kernel.org> References: <20260406141735.2179309-1-rppt@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 9832DC0011 X-Stat-Signature: 5o7337saktr86hj1heddbuczds4u677w X-Rspam-User: X-Rspamd-Server: rspam10 X-HE-Tag: 1775485373-782802 X-HE-Meta: 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 vOMa4DJM MyiCh4xD2TYndXmQEsZk69pYUHWnoijzWSVqGfiHApCDbaW9gdFFAu9rrXzBrfXIw8sIbZB4VvYgVqcMg6WN0aZTDqBCJUHM02T7RpNAUjAQeoLeyYdiEIB/86S8XBlTijVG/I+AHaMsluZn1y94bpfarA1yuiPtM1VllhZRgjmu6z3jyUxD6dEu3dv9Pl07aPxEsVf6dJUm8CJCkxIVFvQyct6s+KCOX7cfFHYVsTuNCUGVkiPJgQOV3gZReVMrg7C7WTrfck/0rGfwe5GPI2BIDvZ/OcSF3X9qh Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: "Mike Rapoport (Microsoft)" All the tests that use HugeTLB can detect and setup HugeTLB pages on their own. Drop detection and setup of HugeTLB from run_vmtests.sh. Signed-off-by: Mike Rapoport (Microsoft) --- tools/testing/selftests/mm/run_vmtests.sh | 128 ++-------------------- 1 file changed, 9 insertions(+), 119 deletions(-) diff --git a/tools/testing/selftests/mm/run_vmtests.sh b/tools/testing/selftests/mm/run_vmtests.sh index b42d19036182..7e0c379e7af4 100755 --- a/tools/testing/selftests/mm/run_vmtests.sh +++ b/tools/testing/selftests/mm/run_vmtests.sh @@ -157,60 +157,6 @@ run_gup_matrix() { done } -# get huge pagesize and freepages from /proc/meminfo -while read -r name size unit; do - if [ "$name" = "HugePages_Free:" ]; then - freepgs="$size" - fi - if [ "$name" = "Hugepagesize:" ]; then - hpgsize_KB="$size" - fi -done < /proc/meminfo - -# Simple hugetlbfs tests have a hardcoded minimum requirement of -# huge pages totaling 256MB (262144KB) in size. The userfaultfd -# hugetlb test requires a minimum of 2 * nr_cpus huge pages. Take -# both of these requirements into account and attempt to increase -# number of huge pages available. -nr_cpus=$(nproc) -uffd_min_KB=$((hpgsize_KB * nr_cpus * 2)) -hugetlb_min_KB=$((256 * 1024)) -if [[ $uffd_min_KB -gt $hugetlb_min_KB ]]; then - needmem_KB=$uffd_min_KB -else - needmem_KB=$hugetlb_min_KB -fi - -# set proper nr_hugepages -if [ -n "$freepgs" ] && [ -n "$hpgsize_KB" ]; then - orig_nr_hugepgs=$(cat /proc/sys/vm/nr_hugepages) - needpgs=$((needmem_KB / hpgsize_KB)) - tries=2 - while [ "$tries" -gt 0 ] && [ "$freepgs" -lt "$needpgs" ]; do - lackpgs=$((needpgs - freepgs)) - echo 3 > /proc/sys/vm/drop_caches - if ! echo $((lackpgs + orig_nr_hugepgs)) > /proc/sys/vm/nr_hugepages; then - echo "Please run this test as root" - exit $ksft_skip - fi - while read -r name size unit; do - if [ "$name" = "HugePages_Free:" ]; then - freepgs=$size - fi - done < /proc/meminfo - tries=$((tries - 1)) - done - nr_hugepgs=$(cat /proc/sys/vm/nr_hugepages) - if [ "$freepgs" -lt "$needpgs" ]; then - printf "Not enough huge pages available (%d < %d)\n" \ - "$freepgs" "$needpgs" - fi - HAVE_HUGEPAGES=1 -else - echo "no hugetlbfs support in kernel?" - HAVE_HUGEPAGES=0 -fi - # filter 64bit architectures ARCH64STR="arm64 mips64 parisc64 ppc64 ppc64le riscv64 s390x sparc64 x86_64" if [ -z "$ARCH" ]; then @@ -283,29 +229,13 @@ run_test() { echo "TAP version 13" | tap_output CATEGORY="hugetlb" run_test ./hugetlb-mmap - -shmmax=$(cat /proc/sys/kernel/shmmax) -shmall=$(cat /proc/sys/kernel/shmall) -echo 268435456 > /proc/sys/kernel/shmmax -echo 4194304 > /proc/sys/kernel/shmall CATEGORY="hugetlb" run_test ./hugetlb-shm -echo "$shmmax" > /proc/sys/kernel/shmmax -echo "$shmall" > /proc/sys/kernel/shmall - CATEGORY="hugetlb" run_test ./hugetlb-mremap CATEGORY="hugetlb" run_test ./hugetlb-vmemmap CATEGORY="hugetlb" run_test ./hugetlb-madvise CATEGORY="hugetlb" run_test ./hugetlb_dio - -if [ "${HAVE_HUGEPAGES}" = "1" ]; then - nr_hugepages_tmp=$(cat /proc/sys/vm/nr_hugepages) - # For this test, we need one and just one huge page - echo 1 > /proc/sys/vm/nr_hugepages - CATEGORY="hugetlb" run_test ./hugetlb_fault_after_madv - CATEGORY="hugetlb" run_test ./hugetlb_madv_vs_map - # Restore the previous number of huge pages, since further tests rely on it - echo "$nr_hugepages_tmp" > /proc/sys/vm/nr_hugepages -fi +CATEGORY="hugetlb" run_test ./hugetlb_fault_after_madv +CATEGORY="hugetlb" run_test ./hugetlb_madv_vs_map if test_selected "hugetlb"; then echo "NOTE: These hugetlb tests provide minimal coverage. Use" | tap_prefix @@ -332,44 +262,12 @@ CATEGORY="gup_test" run_test ./gup_longterm CATEGORY="userfaultfd" run_test ./uffd-unit-tests uffd_stress_bin=./uffd-stress CATEGORY="userfaultfd" run_test ${uffd_stress_bin} anon 20 16 -# Hugetlb tests require source and destination huge pages. Pass in almost half -# the size of the free pages we have, which is used for *each*. An adjustment -# of (nr_parallel - 1) is done (see nr_parallel in uffd-stress.c) to have some -# extra hugepages - this is done to prevent the test from failing by racily -# reserving more hugepages than strictly required. -# uffd-stress expects a region expressed in MiB, so we adjust -# half_ufd_size_MB accordingly. adjustment=$(( (31 < (nr_cpus - 1)) ? 31 : (nr_cpus - 1) )) -half_ufd_size_MB=$((((freepgs - adjustment) * hpgsize_KB) / 1024 / 2)) -CATEGORY="userfaultfd" run_test ${uffd_stress_bin} hugetlb "$half_ufd_size_MB" 32 -CATEGORY="userfaultfd" run_test ${uffd_stress_bin} hugetlb-private "$half_ufd_size_MB" 32 +CATEGORY="userfaultfd" run_test ${uffd_stress_bin} hugetlb 128 32 +CATEGORY="userfaultfd" run_test ${uffd_stress_bin} hugetlb-private 128 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="userfaultfd" run_test ./uffd-wp-mremap CATEGORY="compaction" run_test ./compaction_test @@ -393,14 +291,11 @@ CATEGORY="mremap" run_test ./mremap_test CATEGORY="hugetlb" run_test ./thuge-gen CATEGORY="hugetlb" run_test ./charge_reserved_hugetlb.sh -cgroup-v2 CATEGORY="hugetlb" run_test ./hugetlb_reparenting_test.sh -cgroup-v2 + if $RUN_DESTRUCTIVE; then -nr_hugepages_tmp=$(cat /proc/sys/vm/nr_hugepages) -enable_soft_offline=$(cat /proc/sys/vm/enable_soft_offline) -echo 8 > /proc/sys/vm/nr_hugepages -CATEGORY="hugetlb" run_test ./hugetlb-soft-offline -echo "$nr_hugepages_tmp" > /proc/sys/vm/nr_hugepages -echo "$enable_soft_offline" > /proc/sys/vm/enable_soft_offline -CATEGORY="hugetlb" run_test ./hugetlb-read-hwpoison + CATEGORY="hugetlb" run_test ./hugetlb-soft-offline + echo "$enable_soft_offline" > /proc/sys/vm/enable_soft_offline + CATEGORY="hugetlb" run_test ./hugetlb-read-hwpoison fi if [ $VADDR64 -ne 0 ]; then @@ -464,7 +359,6 @@ if [ -x ./protection_keys_64 ] then CATEGORY="pkey" run_test ./protection_keys_64 fi -echo "$nr_hugepgs" > /proc/sys/vm/nr_hugepages if [ -x ./soft-dirty ] then @@ -545,10 +439,6 @@ if [ -n "${LOADED_MOD}" ]; then modprobe -r hwpoison_inject > /dev/null 2>&1 fi -if [ "${HAVE_HUGEPAGES}" = 1 ]; then - echo "$orig_nr_hugepgs" > /proc/sys/vm/nr_hugepages -fi - echo "SUMMARY: PASS=${count_pass} SKIP=${count_skip} FAIL=${count_fail}" | tap_prefix echo "1..${count_total}" | tap_output -- 2.53.0