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| author | Nico Pache <npache@redhat.com> | 2024-01-17 21:00:37 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-02-22 21:24:39 +0300 |
| commit | b433ffa8dbacbc5fddd6a110c4a23d0d711a6e74 (patch) | |
| tree | 68491ee0480c62d2696e5f480bd357dabc9ddcd7 | |
| parent | 6ca03f1bb5a7427a66df62c954b3500a4255cdb9 (diff) | |
| download | linux-b433ffa8dbacbc5fddd6a110c4a23d0d711a6e74.tar.xz | |
selftests: mm: perform some system cleanup before using hugepages
When running with CATEGORY= (thp | hugetlb) we see a large numbers of
tests failing. These failures are due to not being able to allocate a
hugepage and normally occur on memory contrainted systems or when using
large page sizes.
drop_cache and compact_memory before the tests for a higher chance at a
successful hugepage allocation.
Link: https://lkml.kernel.org/r/20240117180037.15734-1-npache@redhat.com
Signed-off-by: Nico Pache <npache@redhat.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rwxr-xr-x | tools/testing/selftests/mm/run_vmtests.sh | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/tools/testing/selftests/mm/run_vmtests.sh b/tools/testing/selftests/mm/run_vmtests.sh index 246d53a5d7f2..040f27e21f47 100755 --- a/tools/testing/selftests/mm/run_vmtests.sh +++ b/tools/testing/selftests/mm/run_vmtests.sh @@ -206,6 +206,15 @@ pretty_name() { # Usage: run_test [test binary] [arbitrary test arguments...] 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" ] | [ ${CATEGORY} == "hugetlb" ]; then + echo 3 > /proc/sys/vm/drop_caches + sleep 2 + echo 1 > /proc/sys/vm/compact_memory + sleep 2 + fi + local test=$(pretty_name "$*") local title="running $*" local sep=$(echo -n "$title" | tr "[:graph:][:space:]" -) |