[merged mm-stable] selftests-mm-hugetlb-read-hwpoison-add-setup-of-hugetlb-pages.patch removed from -mm tree

[merged mm-stable] selftests-mm-hugetlb-read-hwpoison-add-setup-of-hugetlb-pages.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: selftests/mm: hugetlb-read-hwpoison: add setup of HugeTLB pages
has been removed from the -mm tree.  Its filename was
     selftests-mm-hugetlb-read-hwpoison-add-setup-of-hugetlb-pages.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: Jaeyeon Lee <jaeyeon.lee.dev@gmail.com>
Subject: selftests/mm: hugetlb-read-hwpoison: add setup of HugeTLB pages
Date: Sun,  4 Oct 2026 22:54:58 +0200

Every test is expected to reserve the HugeTLB pages it needs. 
hugetlb-read-hwpoison was not converted, so on a system without
pre-reserved huge pages the MAP_POPULATE mmap() fails with ENOMEM and
every test case is skipped.

Reserve the pages with hugetlb_setup_default().  Each chunk size runs two
HWPOISON tests and a poisoned huge page can't be reused, so reserve two
pages per chunk size.  The pool size is restored on exit.  The poisoned
pages remain allocated until reboot.

With the patch, all 12 cases pass on a system with no huge pages
reserved (tested on Fedora, x86_64, CONFIG_MEMORY_FAILURE=y).

Link: https://lore.kernel.org/20261004205458.119608-1-jaeyeon.lee.dev@gmail.com
Signed-off-by: Jaeyeon Lee <jaeyeon.lee.dev@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Tested-by: Sarthak Sharma <sarthak.sharma@arm.com>
Reviewed-by: Sarthak Sharma <sarthak.sharma@arm.com>
Assisted-by: LLM
Cc: David Hildenbrand <david@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Lorenzo Stoakes <ljs@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/hugetlb-read-hwpoison.c |    8 ++++++++
 1 file changed, 8 insertions(+)

--- a/tools/testing/selftests/mm/hugetlb-read-hwpoison.c~selftests-mm-hugetlb-read-hwpoison-add-setup-of-hugetlb-pages
+++ a/tools/testing/selftests/mm/hugetlb-read-hwpoison.c
@@ -13,6 +13,7 @@
 #include <signal.h>
 
 #include "kselftest.h"
+#include "vm_util.h"
 
 #define MAX_WRITE_READ_CHUNK_SIZE (getpagesize() * 16)
 #define MAX(a, b) (((a) > (b)) ? (a) : (b))
@@ -281,6 +282,13 @@ int main(void)
 	size_t i;
 
 	ksft_print_header();
+
+	if (!hugetlb_available())
+		ksft_exit_skip("HugeTLB is not available\n");
+
+	if (!hugetlb_setup_default(ARRAY_SIZE(wr_chunk_sizes) * 2))
+		ksft_exit_skip("Not enough free huge pages\n");
+
 	ksft_set_plan(ARRAY_SIZE(wr_chunk_sizes) * 3);
 
 	signal(SIGBUS, sigbus_handler);
_

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