Re: [PATCH v2] selftests/mm: skip khugepaged file tests if mkfs.xfs is unavailable

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

On Sat, Sep 12, 2026 at 10:29:03PM +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. Assign
> SPLIT_HUGE_PAGE_TEST_XFS_PATH only once mkfs.xfs and mount have both
> succeeded, and remove the image and directory otherwise.
>
> Suggested-by: Zi Yan <ziy@nvidia.com>
> Assisted-by: LLM
> Signed-off-by: Jaeyeon Lee <jaeyeon.lee.dev@gmail.com>

I guess you didn't propagate my tag as it changed a bit? Anyway LGTM so:

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

> ---
> Changes in v2:
> - Attempt mkfs.xfs and mount and fall back if either fails, rather than
>   only checking whether mkfs.xfs exists (Zi Yan)
> - Fix Assisted-by tag format
>
> v1: https://lore.kernel.org/linux-mm/20260911124517.63714-1-jaeyeon.lee.dev@gmail.com/
>
>  tools/testing/selftests/mm/run_vmtests.sh | 12 ++++++++----
>  1 file changed, 8 insertions(+), 4 deletions(-)
>
> diff --git a/tools/testing/selftests/mm/run_vmtests.sh b/tools/testing/selftests/mm/run_vmtests.sh
> index d09f9f6a384e..b870d21c055a 100755
> --- a/tools/testing/selftests/mm/run_vmtests.sh
> +++ b/tools/testing/selftests/mm/run_vmtests.sh
> @@ -417,11 +417,15 @@ if [ -z "${SPLIT_HUGE_PAGE_TEST_XFS_PATH}" ]; then
>      if test_selected "thp"; then
>  	if grep xfs /proc/filesystems &>/dev/null; then
>  	    XFS_IMG=$(mktemp /tmp/xfs_img_XXXXXX)
> -	    SPLIT_HUGE_PAGE_TEST_XFS_PATH=$(mktemp -d /tmp/xfs_dir_XXXXXX)
> +	    XFS_DIR=$(mktemp -d /tmp/xfs_dir_XXXXXX)
>  	    truncate -s 314572800 ${XFS_IMG}
> -	    mkfs.xfs -q ${XFS_IMG}
> -	    mount -o loop ${XFS_IMG} ${SPLIT_HUGE_PAGE_TEST_XFS_PATH}
> -	    MOUNTED_XFS=1
> +	    if mkfs.xfs -q ${XFS_IMG} && mount -t xfs -o loop ${XFS_IMG} ${XFS_DIR}; then
> +	        SPLIT_HUGE_PAGE_TEST_XFS_PATH=${XFS_DIR}
> +	        MOUNTED_XFS=1
> +	    else
> +	        rmdir ${XFS_DIR}
> +	        rm -f ${XFS_IMG}
> +	    fi
>  	fi
>      fi
>  fi
> --
> 2.43.0
>

--
Cheers, Lorenzo