Patch "ext4: set lazytime on remount if MS_LAZYTIME is set by mount" has been added to the 4.1-stable tree

This is a note to let you know that I've just added the patch titled

ext4: set lazytime on remount if MS_LAZYTIME is set by mount

to the 4.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
ext4-set-lazytime-on-remount-if-ms_lazytime-is-set-by-mount.patch
and it can be found in the queue-4.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Theodore Ts'o <[email protected]>
Date: Tue, 23 Jun 2015 11:03:54 -0400
Subject: ext4: set lazytime on remount if MS_LAZYTIME is set by mount

From: Theodore Ts'o <[email protected]>

commit a2fd66d069d86d793e9d39d4079b96f46d13f237 upstream.

Newer versions of mount parse the lazytime feature and pass it to the mount system call via the flags field in the mount system call, removing the lazytime string from the mount options list. So we need to check for the presence of MS_LAZYTIME and set it in sb->s_flags in order for this flag to be set on a remount.

---
 fs/ext4/super.c |    3 +++
 1 file changed, 3 insertions(+)

@@ -4944,6 +4944,9 @@ static int ext4_remount(struct super_blo
 		set_task_ioprio(sbi->s_journal->j_task, journal_ioprio);
 	}
 
+	if (*flags & MS_LAZYTIME)
+		sb->s_flags |= MS_LAZYTIME;
+
 	if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
 		if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) {
 			err = -EROFS;

Patches currently in stable-queue which might be from [email protected] are

queue-4.1/ext4-correctly-migrate-a-file-with-a-hole-at-the-beginning.patch queue-4.1/ext4-set-lazytime-on-remount-if-ms_lazytime-is-set-by-mount.patch queue-4.1/jbd2-fix-ocfs2-corrupt-when-updating-journal-superblock-fails.patch queue-4.1/ext4-be-more-strict-when-migrating-to-non-extent-based-file.patch queue-4.1/jbd2-use-gfp_nofs-in-jbd2_cleanup_journal_tail.patch queue-4.1/ext4-fix-fencepost-error-in-lazytime-optimization.patch queue-4.1/ext4-replace-open-coded-nofail-allocation-in-ext4_free_blocks.patch queue-4.1/ext4-don-t-retry-file-block-mapping-on-bigalloc-fs-with-non-extent-file.patch queue-4.1/bufferhead-add-_gfp-version-for-sb_getblk.patch queue-4.1/ext4-avoid-deadlocks-in-the-writeback-path-by-using-sb_getblk_gfp.patch queue-4.1/ext4-call-sync_blockdev-before-invalidate_bdev-in-put_super.patch queue-4.1/ext4-fix-race-between-truncate-and-__ext4_journalled_writepage.patch queue-4.1/ext4-fix-reservation-release-on-invalidatepage-for-delalloc-fs.patch