#!/bin/bash
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# please run as root
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# Kselftest framework requirement - SKIP code is 4.
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ksft_skip=4
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#
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# To test memfd_create with hugetlbfs, there needs to be hpages_test
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# huge pages free. Attempt to allocate enough pages to test.
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#
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hpages_test=8
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#
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# Get count of free huge pages from /proc/meminfo
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#
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while read name size unit; do
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if [ "$name" = "HugePages_Free:" ]; then
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freepgs=$size
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fi
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done < /proc/meminfo
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#
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# If not enough free huge pages for test, attempt to increase
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#
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if [ -n "$freepgs" ] && [ $freepgs -lt $hpages_test ]; then
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nr_hugepgs=`cat /proc/sys/vm/nr_hugepages`
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hpages_needed=`expr $hpages_test - $freepgs`
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if [ $UID != 0 ]; then
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echo "Please run memfd with hugetlbfs test as root"
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exit $ksft_skip
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fi
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echo 3 > /proc/sys/vm/drop_caches
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echo $(( $hpages_needed + $nr_hugepgs )) > /proc/sys/vm/nr_hugepages
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while read name size unit; do
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if [ "$name" = "HugePages_Free:" ]; then
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freepgs=$size
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fi
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done < /proc/meminfo
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fi
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#
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# If still not enough huge pages available, exit. But, give back any huge
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# pages potentially allocated above.
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#
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if [ $freepgs -lt $hpages_test ]; then
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# nr_hugepgs non-zero only if we attempted to increase
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if [ -n "$nr_hugepgs" ]; then
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echo $nr_hugepgs > /proc/sys/vm/nr_hugepages
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fi
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printf "Not enough huge pages available (%d < %d)\n" \
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$freepgs $needpgs
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exit $ksft_skip
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fi
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#
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# Run the hugetlbfs test
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#
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./memfd_test hugetlbfs
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./run_fuse_test.sh hugetlbfs
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#
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# Give back any huge pages allocated for the test
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#
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if [ -n "$nr_hugepgs" ]; then
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echo $nr_hugepgs > /proc/sys/vm/nr_hugepages
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fi
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