Re: [PATCH] selftests/mm: skip khugepaged file tests if mkfs.xfs is unavailable

["Lorenzo Stoakes (ARM)" <ljs@kernel.org>]

On Fri, Sep 11, 2026 at 02:45:17PM +0200, Jaeyeon Lee wrote:
> The XFS setup for ./khugepaged all:file checks that the kernel supports
> XFS but not that mkfs.xfs is installed. When CONFIG_XFS_FS=y and
> xfsprogs is missing, mkfs.xfs and mount both fail, but
> SPLIT_HUGE_PAGE_TEST_XFS_PATH is assigned from mktemp -d and stays set.
> The test then runs against plain tmpfs and six subtests fail.
>
> The script already has a skip path for this test, but it never runs
> because the path variable is always set. Check that mkfs.xfs exists
> before attempting the XFS setup.
>
> Assisted-by: claude.ai:claude-opus-5

Convention is now:

Assisted-by: LLM

See https://docs.kernel.org/process/coding-assistants.html

> Signed-off-by: Jaeyeon Lee <jaeyeon.lee.dev@gmail.com>

This seems sensible, so with the tag fixed:

Reviewed-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>

> ---
>  tools/testing/selftests/mm/run_vmtests.sh | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/tools/testing/selftests/mm/run_vmtests.sh b/tools/testing/selftests/mm/run_vmtests.sh
> index d09f9f6a384e..6315b67b6733 100755
> --- a/tools/testing/selftests/mm/run_vmtests.sh
> +++ b/tools/testing/selftests/mm/run_vmtests.sh
> @@ -415,7 +415,8 @@ CATEGORY="thp" run_test ./khugepaged -c 4 mthp_khugepaged:anon
>  # Try to create XFS if not provided
>  if [ -z "${SPLIT_HUGE_PAGE_TEST_XFS_PATH}" ]; then
>      if test_selected "thp"; then
> -	if grep xfs /proc/filesystems &>/dev/null; then
> +	if grep xfs /proc/filesystems &>/dev/null &&
> +	   command -v mkfs.xfs &>/dev/null; then
>  	    XFS_IMG=$(mktemp /tmp/xfs_img_XXXXXX)
>  	    SPLIT_HUGE_PAGE_TEST_XFS_PATH=$(mktemp -d /tmp/xfs_dir_XXXXXX)
>  	    truncate -s 314572800 ${XFS_IMG}
> --
> 2.43.0
>

--
Cheers, Lorenzo