tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#!/bin/bash
2# please run as root
3
4# Kselftest framework requirement - SKIP code is 4.
5ksft_skip=4
6
7#
8# To test memfd_create with hugetlbfs, there needs to be hpages_test
9# huge pages free. Attempt to allocate enough pages to test.
10#
11hpages_test=8
12
13#
14# Get count of free huge pages from /proc/meminfo
15#
16while read name size unit; do
17 if [ "$name" = "HugePages_Free:" ]; then
18 freepgs=$size
19 fi
20done < /proc/meminfo
21
22#
23# If not enough free huge pages for test, attempt to increase
24#
25if [ -n "$freepgs" ] && [ $freepgs -lt $hpages_test ]; then
26 nr_hugepgs=`cat /proc/sys/vm/nr_hugepages`
27 hpages_needed=`expr $hpages_test - $freepgs`
28
29 if [ $UID != 0 ]; then
30 echo "Please run memfd with hugetlbfs test as root"
31 exit $ksft_skip
32 fi
33
34 echo 3 > /proc/sys/vm/drop_caches
35 echo $(( $hpages_needed + $nr_hugepgs )) > /proc/sys/vm/nr_hugepages
36 while read name size unit; do
37 if [ "$name" = "HugePages_Free:" ]; then
38 freepgs=$size
39 fi
40 done < /proc/meminfo
41fi
42
43#
44# If still not enough huge pages available, exit. But, give back any huge
45# pages potentially allocated above.
46#
47if [ $freepgs -lt $hpages_test ]; then
48 # nr_hugepgs non-zero only if we attempted to increase
49 if [ -n "$nr_hugepgs" ]; then
50 echo $nr_hugepgs > /proc/sys/vm/nr_hugepages
51 fi
52 printf "Not enough huge pages available (%d < %d)\n" \
53 $freepgs $needpgs
54 exit $ksft_skip
55fi
56
57#
58# Run the hugetlbfs test
59#
60./memfd_test hugetlbfs
61./run_fuse_test.sh hugetlbfs
62
63#
64# Give back any huge pages allocated for the test
65#
66if [ -n "$nr_hugepgs" ]; then
67 echo $nr_hugepgs > /proc/sys/vm/nr_hugepages
68fi