[merged mm-stable] selftests-mm-ensure-uffd-wp-mremap-gets-pages-of-each-size.patch removed from -mm tree

[merged mm-stable] selftests-mm-ensure-uffd-wp-mremap-gets-pages-of-each-size.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: selftests/mm: ensure uffd-wp-mremap gets pages of each size
has been removed from the -mm tree.  Its filename was
     selftests-mm-ensure-uffd-wp-mremap-gets-pages-of-each-size.patch

This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Brendan Jackman <jackmanb@google.com>
Subject: selftests/mm: ensure uffd-wp-mremap gets pages of each size
Date: Tue, 11 Mar 2025 13:18:21 +0000

This test allocates a page of every available size and doesn't have any
SKIP logic if the allocation fails.  So, ensure it's available and skip
the test if we can't do so.

Link: https://lkml.kernel.org/r/20250311-mm-selftests-v4-10-dec210a658f5@google.com
Signed-off-by: Brendan Jackman <jackmanb@google.com>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Mateusz Guzik <mjguzik@gmail.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 tools/testing/selftests/mm/run_vmtests.sh |   23 +++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

--- a/tools/testing/selftests/mm/run_vmtests.sh~selftests-mm-ensure-uffd-wp-mremap-gets-pages-of-each-size
+++ a/tools/testing/selftests/mm/run_vmtests.sh
@@ -325,9 +325,30 @@ CATEGORY="userfaultfd" run_test ${uffd_s
 CATEGORY="userfaultfd" run_test ${uffd_stress_bin} hugetlb-private "$half_ufd_size_MB" 32
 CATEGORY="userfaultfd" run_test ${uffd_stress_bin} shmem 20 16
 CATEGORY="userfaultfd" run_test ${uffd_stress_bin} shmem-private 20 16
-CATEGORY="userfaultfd" run_test ./uffd-wp-mremap
+# uffd-wp-mremap requires at least one page of each size.
+have_all_size_hugepgs=true
+declare -A nr_size_hugepgs
+for f in /sys/kernel/mm/hugepages/**/nr_hugepages; do
+	old=$(cat $f)
+	nr_size_hugepgs["$f"]="$old"
+	if [ "$old" == 0 ]; then
+		echo 1 > "$f"
+	fi
+	if [ $(cat "$f") == 0 ]; then
+		have_all_size_hugepgs=false
+		break
+	fi
+done
+if $have_all_size_hugepgs; then
+	CATEGORY="userfaultfd" run_test ./uffd-wp-mremap
+else
+	echo "# SKIP ./uffd-wp-mremap"
+fi
 
 #cleanup
+for f in "${!nr_size_hugepgs[@]}"; do
+	echo "${nr_size_hugepgs["$f"]}" > "$f"
+done
 echo "$nr_hugepgs" > /proc/sys/vm/nr_hugepages
 
 CATEGORY="compaction" run_test ./compaction_test
_

Patches currently in -mm which might be from jackmanb@google.com are

scripts-gdb-add-lx_per_cpu_ptr.patch