The quilt patch titled
Subject: ext4: use bdev_getblk() to avoid memory reclaim in readahead path
has been removed from the -mm tree. Its filename was
ext4-use-bdev_getblk-to-avoid-memory-reclaim-in-readahead-path.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: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>
Subject: ext4: use bdev_getblk() to avoid memory reclaim in readahead path
Date: Thu, 14 Sep 2023 16:00:06 +0100
sb_getblk_gfp adds __GFP_NOFAIL, which is unnecessary for readahead; we're
quite comfortable with the possibility that we may not get a bh back.
Switch to bdev_getblk() which does not include __GFP_NOFAIL.
Link: https://lkml.kernel.org/r/20230914150011.843330-4-willy@xxxxxxxxxxxxx
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Reported-by: Hui Zhu <teawater@xxxxxxxxxxxx>
Closes: https://lore.kernel.org/linux-fsdevel/20230811035705.3296-1-teawaterz@xxxxxxxxxxxxxxxxx/
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/ext4/super.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/fs/ext4/super.c~ext4-use-bdev_getblk-to-avoid-memory-reclaim-in-readahead-path
+++ a/fs/ext4/super.c
@@ -255,7 +255,8 @@ struct buffer_head *ext4_sb_bread_unmova
void ext4_sb_breadahead_unmovable(struct super_block *sb, sector_t block)
{
- struct buffer_head *bh = sb_getblk_gfp(sb, block, 0);
+ struct buffer_head *bh = bdev_getblk(sb->s_bdev, block,
+ sb->s_blocksize, GFP_NOWAIT);
if (likely(bh)) {
if (trylock_buffer(bh))
_
Patches currently in -mm which might be from willy@xxxxxxxxxxxxx are
mm-make-lock_folio_maybe_drop_mmap-vma-lock-aware.patch
mm-call-wp_page_copy-under-the-vma-lock.patch
mm-handle-shared-faults-under-the-vma-lock.patch
mm-handle-cow-faults-under-the-vma-lock.patch
mm-handle-read-faults-under-the-vma-lock.patch
mm-handle-write-faults-to-ro-pages-under-the-vma-lock.patch
