The quilt patch titled Subject: mm: shmem: fix the update of 'shmem_falloc->nr_unswapped' has been removed from the -mm tree. Its filename was mm-shmem-fix-the-update-of-shmem_falloc-nr_unswapped.patch

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

------------------------------------------------------ From: Baolin Wang baolin.wang@linux.alibaba.com Subject: mm: shmem: fix the update of 'shmem_falloc->nr_unswapped' Date: Thu, 19 Dec 2024 15:30:09 +0800

The 'shmem_falloc->nr_unswapped' is used to record how many writepage refused to swap out because fallocate() is allocating, but after shmem supports large folio swap out, the update of 'shmem_falloc->nr_unswapped' does not use the correct number of pages in the large folio, which may lead to fallocate() not exiting as soon as possible.

Anyway, this is found through code inspection, and I am not sure whether it would actually cause serious issues.

Link: https://lkml.kernel.org/r/f66a0119d0564c2c37c84f045835b870d1b2196f.173459315... Fixes: 809bc86517cc ("mm: shmem: support large folio swap out") Signed-off-by: Baolin Wang baolin.wang@linux.alibaba.com Acked-by: David Hildenbrand david@redhat.com Cc: Hugh Dickins hughd@google.com Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org ---

mm/shmem.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/mm/shmem.c~mm-shmem-fix-the-update-of-shmem_falloc-nr_unswapped +++ a/mm/shmem.c @@ -1535,7 +1535,7 @@ try_split: !shmem_falloc->waitq && index >= shmem_falloc->start && index < shmem_falloc->next) - shmem_falloc->nr_unswapped++; + shmem_falloc->nr_unswapped += nr_pages; else shmem_falloc = NULL; spin_unlock(&inode->i_lock); _

Patches currently in -mm which might be from baolin.wang@linux.alibaba.com are

mm-factor-out-the-order-calculation-into-a-new-helper.patch mm-shmem-change-shmem_huge_global_enabled-to-return-huge-order-bitmap.patch mm-shmem-add-large-folio-support-for-tmpfs.patch mm-shmem-add-a-kernel-command-line-to-change-the-default-huge-policy-for-tmpfs.patch docs-tmpfs-drop-fadvise-from-the-documentation.patch