[PATCHv3 2/3] ext4: allocate buffer-cache for superblock in, non-movable area
From: Gioh Kim <hidden>
Date: 2014-08-28 02:32:32
Also in:
linux-fsdevel, lkml
Subsystem:
ext4 file system, filesystems (vfs and infrastructure), the rest · Maintainers:
"Theodore Ts'o", Alexander Viro, Christian Brauner, Linus Torvalds
A buffer-cache for superblock is disturbing page migration, because the buffer-cache is not released until unmount. The buffer-cache must be allocated from non-movable area. Signed-off-by: Gioh Kim <redacted> --- fs/ext4/super.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 32b43ad..e4b62b3 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c@@ -3435,7 +3435,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) logical_sb_block = sb_block; } - if (!(bh = sb_bread(sb, logical_sb_block))) { + if (!(bh = sb_bread_unmovable(sb, logical_sb_block))) { ext4_msg(sb, KERN_ERR, "unable to read superblock"); goto out_fail; }
@@ -3645,7 +3645,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) brelse(bh); logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; offset = do_div(logical_sb_block, blocksize); - bh = sb_bread(sb, logical_sb_block); + bh = sb_bread_unmovable(sb, logical_sb_block); if (!bh) { ext4_msg(sb, KERN_ERR, "Can't read superblock on 2nd try");
@@ -3867,7 +3867,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) for (i = 0; i < db_count; i++) { block = descriptor_loc(sb, logical_sb_block, i); - sbi->s_group_desc[i] = sb_bread(sb, block); + sbi->s_group_desc[i] = sb_bread_unmovable(sb, block); if (!sbi->s_group_desc[i]) { ext4_msg(sb, KERN_ERR, "can't read group descriptor %d", i); --
1.7.9.5