The quilt patch titled
Subject: selftests: vm: fix shellcheck warnings in run_vmtests.sh
has been removed from the -mm tree. Its filename was
selftests-vm-fix-shellcheck-warnings-in-run_vmtestssh.patch
This patch was dropped because it was merged into mm-stable
------------------------------------------------------
From: Axel Rasmussen <axelrasmussen@xxxxxxxxxx>
Subject: selftests: vm: fix shellcheck warnings in run_vmtests.sh
These might not be issues yet, but they make the script more fragile.
Also by fixing them we give a better example to future readers, who might
copy/paste or otherwise re-use snippets from our script.
- Use "read -r", since we don't ever want read to be interpreting '\'
characters as escape sequences...
- Quote variables, to deal with spaces properly.
- Use $() instead of the older and harder-to-nest ``.
- Get rid of superfluous "$" prefixes inside arithmetic $(()).
Link: https://lkml.kernel.org/r/20220421224928.1848230-2-axelrasmussen@xxxxxxxxxx
Signed-off-by: Axel Rasmussen <axelrasmussen@xxxxxxxxxx>
Cc: Shuah Khan <shuah@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
tools/testing/selftests/vm/run_vmtests.sh | 55 +++++++++-----------
1 file changed, 27 insertions(+), 28 deletions(-)
--- a/tools/testing/selftests/vm/run_vmtests.sh~selftests-vm-fix-shellcheck-warnings-in-run_vmtestssh
+++ a/tools/testing/selftests/vm/run_vmtests.sh
@@ -9,12 +9,12 @@ mnt=./huge
exitcode=0
#get huge pagesize and freepages from /proc/meminfo
-while read name size unit; do
+while read -r name size unit; do
if [ "$name" = "HugePages_Free:" ]; then
- freepgs=$size
+ freepgs="$size"
fi
if [ "$name" = "Hugepagesize:" ]; then
- hpgsize_KB=$size
+ hpgsize_KB="$size"
fi
done < /proc/meminfo
@@ -30,27 +30,26 @@ needmem_KB=$((half_ufd_size_MB * 2 * 102
#set proper nr_hugepages
if [ -n "$freepgs" ] && [ -n "$hpgsize_KB" ]; then
- nr_hugepgs=`cat /proc/sys/vm/nr_hugepages`
+ 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 - $freepgs ))
+ while [ "$tries" -gt 0 ] && [ "$freepgs" -lt "$needpgs" ]; do
+ lackpgs=$((needpgs - freepgs))
echo 3 > /proc/sys/vm/drop_caches
- echo $(( $lackpgs + $nr_hugepgs )) > /proc/sys/vm/nr_hugepages
- if [ $? -ne 0 ]; then
+ if ! echo $((lackpgs + nr_hugepgs)) > /proc/sys/vm/nr_hugepages; then
echo "Please run this test as root"
exit $ksft_skip
fi
- while read name size unit; do
+ while read -r name size unit; do
if [ "$name" = "HugePages_Free:" ]; then
freepgs=$size
fi
done < /proc/meminfo
tries=$((tries - 1))
done
- if [ $freepgs -lt $needpgs ]; then
+ if [ "$freepgs" -lt "$needpgs" ]; then
printf "Not enough huge pages available (%d < %d)\n" \
- $freepgs $needpgs
+ "$freepgs" "$needpgs"
exit 1
fi
else
@@ -60,11 +59,11 @@ fi
#filter 64bit architectures
ARCH64STR="arm64 ia64 mips64 parisc64 ppc64 ppc64le riscv64 s390x sh64 sparc64 x86_64"
-if [ -z $ARCH ]; then
- ARCH=`uname -m 2>/dev/null | sed -e 's/aarch64.*/arm64/'`
+if [ -z "$ARCH" ]; then
+ ARCH=$(uname -m 2>/dev/null | sed -e 's/aarch64.*/arm64/')
fi
VADDR64=0
-echo "$ARCH64STR" | grep $ARCH && VADDR64=1
+echo "$ARCH64STR" | grep "$ARCH" && VADDR64=1
# Usage: run_test [test binary] [arbitrary test arguments...]
run_test() {
@@ -85,28 +84,28 @@ run_test() {
fi
}
-mkdir $mnt
-mount -t hugetlbfs none $mnt
+mkdir "$mnt"
+mount -t hugetlbfs none "$mnt"
run_test ./hugepage-mmap
-shmmax=`cat /proc/sys/kernel/shmmax`
-shmall=`cat /proc/sys/kernel/shmall`
+shmmax=$(cat /proc/sys/kernel/shmmax)
+shmall=$(cat /proc/sys/kernel/shmall)
echo 268435456 > /proc/sys/kernel/shmmax
echo 4194304 > /proc/sys/kernel/shmall
run_test ./hugepage-shm
-echo $shmmax > /proc/sys/kernel/shmmax
-echo $shmall > /proc/sys/kernel/shmall
+echo "$shmmax" > /proc/sys/kernel/shmmax
+echo "$shmall" > /proc/sys/kernel/shmall
run_test ./map_hugetlb
-run_test ./hugepage-mremap $mnt/huge_mremap
-rm -f $mnt/huge_mremap
+run_test ./hugepage-mremap "$mnt"/huge_mremap
+rm -f "$mnt"/huge_mremap
run_test ./hugepage-vmemmap
-run_test ./hugetlb-madvise $mnt/madvise-test
-rm -f $mnt/madvise-test
+run_test ./hugetlb-madvise "$mnt"/madvise-test
+rm -f "$mnt"/madvise-test
echo "NOTE: The above hugetlb tests provide minimal coverage. Use"
echo " https://github.com/libhugetlbfs/libhugetlbfs.git for"
@@ -124,13 +123,13 @@ run_test ./gup_test -ct -F 0x1 0 19 0x10
run_test ./userfaultfd anon 20 16
# Test requires source and destination huge pages. Size of source
# (half_ufd_size_MB) is passed as argument to test.
-run_test ./userfaultfd hugetlb $half_ufd_size_MB 32
+run_test ./userfaultfd hugetlb "$half_ufd_size_MB" 32
run_test ./userfaultfd shmem 20 16
#cleanup
-umount $mnt
-rm -rf $mnt
-echo $nr_hugepgs > /proc/sys/vm/nr_hugepages
+umount "$mnt"
+rm -rf "$mnt"
+echo "$nr_hugepgs" > /proc/sys/vm/nr_hugepages
run_test ./compaction_test
_
Patches currently in -mm which might be from axelrasmussen@xxxxxxxxxx are
