+ selftests-mm-skip-khugepaged-file-tests-if-mkfsxfs-is-unavailable.patch added to mm-unstable branch

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: selftests/mm: skip khugepaged file tests if mkfs.xfs is unavailable
has been added to the -mm mm-unstable branch.  Its filename is
     selftests-mm-skip-khugepaged-file-tests-if-mkfsxfs-is-unavailable.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/selftests-mm-skip-khugepaged-file-tests-if-mkfsxfs-is-unavailable.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Jaeyeon Lee <jaeyeon.lee.dev@gmail.com>
Subject: selftests/mm: skip khugepaged file tests if mkfs.xfs is unavailable
Date: Sat, 12 Sep 2026 22:29:03 +0200

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.

Link: https://lore.kernel.org/20260912202903.16157-1-jaeyeon.lee.dev@gmail.com
Signed-off-by: Jaeyeon Lee <jaeyeon.lee.dev@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Suggested-by: Zi Yan <ziy@nvidia.com>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Reviewed-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Assisted-by: LLM
Cc: Shuah Khan <shuah@kernel.org>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Michal Hocko <mhocko@suse.com>
---

 tools/testing/selftests/mm/run_vmtests.sh |   12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

--- a/tools/testing/selftests/mm/run_vmtests.sh~selftests-mm-skip-khugepaged-file-tests-if-mkfsxfs-is-unavailable
+++ a/tools/testing/selftests/mm/run_vmtests.sh
@@ -435,11 +435,15 @@ if [ -z "${SPLIT_HUGE_PAGE_TEST_XFS_PATH
     if test_selected "thp"; then
 	if grep xfs /proc/filesystems &>/dev/null; then
 	    XFS_IMG=$(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
_

Patches currently in -mm which might be from jaeyeon.lee.dev@gmail.com are

mm-damon-tests-use-scoped_guard-for-damon_test_ops_registration.patch
selftests-mm-skip-khugepaged-file-tests-if-mkfsxfs-is-unavailable.patch