linux-kernel - [PATCH 1/2] selftests/mm: Fix check for running THP tests

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Message-Id: <20250212-kselftest-mm-no-hugepages-v1-1-44702f538522@kernel.org>
Date: Wed, 12 Feb 2025 17:44:25 +0000
From: Mark Brown <broonie@...nel.org>
To: Andrew Morton <akpm@...ux-foundation.org>, 
 Shuah Khan <shuah@...nel.org>
Cc: Nico Pache <npache@...hat.com>, linux-mm@...ck.org, 
 linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Mark Brown <broonie@...nel.org>
Subject: [PATCH 1/2] selftests/mm: Fix check for running THP tests

When testing if we should try to compact memory or drop caches before we
run the THP or HugeTLB tests we use | as an or operator. This doesn't work
since run_vmtests.sh is written in shell where this is used to pipe the
output of the first argument into the second. Instead use the shell's -o
operator.

Fixes: b433ffa8dbac ("selftests: mm: perform some system cleanup before using hugepages")
Signed-off-by: Mark Brown <broonie@...nel.org>
---
 tools/testing/selftests/mm/run_vmtests.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/mm/run_vmtests.sh b/tools/testing/selftests/mm/run_vmtests.sh
index 333c468c26991421cd8f9ce6d995f9b64b0643c7..da7e266681031d2772fb0c4139648904a18e0bf9 100755
--- a/tools/testing/selftests/mm/run_vmtests.sh
+++ b/tools/testing/selftests/mm/run_vmtests.sh
@@ -220,7 +220,7 @@ run_test() {
 	if test_selected ${CATEGORY}; then
 		# On memory constrainted systems some tests can fail to allocate hugepages.
 		# perform some cleanup before the test for a higher success rate.
-		if [ ${CATEGORY} == "thp" ] | [ ${CATEGORY} == "hugetlb" ]; then
+		if [ ${CATEGORY} == "thp" -o ${CATEGORY} == "hugetlb" ]; then
 			echo 3 > /proc/sys/vm/drop_caches
 			sleep 2
 			echo 1 > /proc/sys/vm/compact_memory

-- 
2.39.5