tools/testing/selftests/memfd/run_tests.sh

   1 #!/bin/bash
   2 # please run as root
   3
   4 #
   5 # Normal tests requiring no special resources
   6 #
   7 ./run_fuse_test.sh
   8 ./memfd_test
   9
  10 #
  11 # To test memfd_create with hugetlbfs, there needs to be hpages_test
  12 # huge pages free.  Attempt to allocate enough pages to test.
  13 #
  14 hpages_test=8
  15
  16 #
  17 # Get count of free huge pages from /proc/meminfo
  18 #
  19 while read name size unit; do
  20         if [ "$name" = "HugePages_Free:" ]; then
  21                 freepgs=$size
  22         fi
  23 done < /proc/meminfo
  24
  25 #
  26 # If not enough free huge pages for test, attempt to increase
  27 #
  28 if [ -n "$freepgs" ] && [ $freepgs -lt $hpages_test ]; then
  29         nr_hugepgs=`cat /proc/sys/vm/nr_hugepages`
  30         hpages_needed=`expr $hpages_test - $freepgs`
  31
  32         echo 3 > /proc/sys/vm/drop_caches
  33         echo $(( $hpages_needed + $nr_hugepgs )) > /proc/sys/vm/nr_hugepages
  34         if [ $? -ne 0 ]; then
  35                 echo "Please run this test as root"
  36                 exit 1
  37         fi
  38         while read name size unit; do
  39                 if [ "$name" = "HugePages_Free:" ]; then
  40                         freepgs=$size
  41                 fi
  42         done < /proc/meminfo
  43 fi
  44
  45 #
  46 # If still not enough huge pages available, exit.  But, give back any huge
  47 # pages potentially allocated above.
  48 #
  49 if [ $freepgs -lt $hpages_test ]; then
  50         # nr_hugepgs non-zero only if we attempted to increase
  51         if [ -n "$nr_hugepgs" ]; then
  52                 echo $nr_hugepgs > /proc/sys/vm/nr_hugepages
  53         fi
  54         printf "Not enough huge pages available (%d < %d)\n" \
  55                 $freepgs $needpgs
  56         exit 1
  57 fi
  58
  59 #
  60 # Run the hugetlbfs test
  61 #
  62 ./memfd_test hugetlbfs
  63
  64 #
  65 # Give back any huge pages allocated for the test
  66 #
  67 if [ -n "$nr_hugepgs" ]; then
  68         echo $nr_hugepgs > /proc/sys/vm/nr_hugepages
  69 fi