[merged mm-stable] ext4-add-__gfp_nowarn-to-gfp_nowait-in-readahead.patch removed from -mm tree

[merged mm-stable] ext4-add-__gfp_nowarn-to-gfp_nowait-in-readahead.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: ext4: add __GFP_NOWARN to GFP_NOWAIT in readahead
has been removed from the -mm tree.  Its filename was
     ext4-add-__gfp_nowarn-to-gfp_nowait-in-readahead.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: Hugh Dickins <hughd@google.com>
Subject: ext4: add __GFP_NOWARN to GFP_NOWAIT in readahead
Date: Mon, 23 Oct 2023 23:26:08 -0700 (PDT)

Since commit e509ad4d77e6 ("ext4: use bdev_getblk() to avoid memory
reclaim in readahead path") rightly replaced GFP_NOFAIL allocations by
GFP_NOWAIT allocations, I've occasionally been seeing "page allocation
failure: order:0" warnings under load: all with
ext4_sb_breadahead_unmovable() in the stack.  I don't think those warnings
are of any interest: suppress them with __GFP_NOWARN.

Link: https://lkml.kernel.org/r/7bc6ad16-9a4d-dd90-202e-47d6cbb5a136@google.com
Fixes: e509ad4d77e6 ("ext4: use bdev_getblk() to avoid memory reclaim in readahead path")
Signed-off-by: Hugh Dickins <hughd@google.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Hui Zhu <teawater@antgroup.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 fs/ext4/super.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/ext4/super.c~ext4-add-__gfp_nowarn-to-gfp_nowait-in-readahead
+++ a/fs/ext4/super.c
@@ -262,7 +262,7 @@ struct buffer_head *ext4_sb_bread_unmova
 void ext4_sb_breadahead_unmovable(struct super_block *sb, sector_t block)
 {
 	struct buffer_head *bh = bdev_getblk(sb->s_bdev, block,
-			sb->s_blocksize, GFP_NOWAIT);
+			sb->s_blocksize, GFP_NOWAIT | __GFP_NOWARN);
 
 	if (likely(bh)) {
 		if (trylock_buffer(bh))
_

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