+ ocfs2-dont-use-write_one_page-in-ocfs2_duplicate_clusters_by_page.patch added to mm-unstable branch

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

The patch titled
     Subject: ocfs2: don't use write_one_page in ocfs2_duplicate_clusters_by_page
has been added to the -mm mm-unstable branch.  Its filename is
     ocfs2-dont-use-write_one_page-in-ocfs2_duplicate_clusters_by_page.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/ocfs2-dont-use-write_one_page-in-ocfs2_duplicate_clusters_by_page.patch

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

Before you just go and hit "reply", please:
   a) Consider who else should be cc'ed
   b) Prefer to cc a suitable mailing list as well
   c) Ideally: find the original patch on the mailing list and do a
      reply-to-all to that, adding suitable additional cc's

*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days

------------------------------------------------------
From: Christoph Hellwig <hch@lst.de>
Subject: ocfs2: don't use write_one_page in ocfs2_duplicate_clusters_by_page
Date: Tue, 7 Mar 2023 15:31:24 +0100

Use filemap_write_and_wait_range to write back the range of the dirty page
instead of write_one_page in preparation of removing write_one_page and
eventually ->writepage.

Link: https://lkml.kernel.org/r/20230307143125.27778-3-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Dave Kleikamp <dave.kleikamp@oracle.com>
Cc: Evgeniy Dushistov <dushistov@mail.ru>
Cc: Gang He <ghe@suse.com>
Cc: Jan Kara via Ocfs2-devel <ocfs2-devel@oss.oracle.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Joseph Qi <jiangqi903@gmail.com>
Cc: Jun Piao <piaojun@huawei.com>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 fs/ocfs2/refcounttree.c |    9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

--- a/fs/ocfs2/refcounttree.c~ocfs2-dont-use-write_one_page-in-ocfs2_duplicate_clusters_by_page
+++ a/fs/ocfs2/refcounttree.c
@@ -2952,10 +2952,11 @@ retry:
 		 */
 		if (PAGE_SIZE <= OCFS2_SB(sb)->s_clustersize) {
 			if (PageDirty(page)) {
-				/*
-				 * write_on_page will unlock the page on return
-				 */
-				ret = write_one_page(page);
+				unlock_page(page);
+				put_page(page);
+
+				ret = filemap_write_and_wait_range(mapping,
+						offset, map_end - 1);
 				goto retry;
 			}
 		}
_

Patches currently in -mm which might be from hch@lst.de are

ufs-dont-flush-page-immediately-for-dirsync-directories.patch
ocfs2-dont-use-write_one_page-in-ocfs2_duplicate_clusters_by_page.patch
mmjfs-move-write_one_page-folio_write_one-to-jfs.patch