The patch titled
Subject: jbd/jbd2: use non-movable memory for the jbd superblock
has been added to the -mm tree. Its filename is
jbd-jbd2-use-non-movable-memory-for-the-jbd-superblock.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/jbd-jbd2-use-non-movable-memory-for-the-jbd-superblock.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/jbd-jbd2-use-non-movable-memory-for-the-jbd-superblock.patch
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------------------------------------------------------
From: Gioh Kim <gioh.kim@xxxxxxx>
Subject: jbd/jbd2: use non-movable memory for the jbd superblock
A long-lasting buffer-cache can distrub page migration so that it must be
allocated from non-movable area.
The journal_init_inode is creating a buffer-cache for superblock
journaling. The superblock exists until system shutdown so that the
buffer-cache for the superblock would also exist for a long time and it
can distrub page migration.
This patch make the buffer-cache be allocated from non-movable area not to
distrub page migration.
Signed-off-by: Gioh Kim <gioh.kim@xxxxxxx>
Reviewed-by: Jan Kara <jack@xxxxxxx>
Cc: "Theodore Ts'o" <tytso@xxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Andreas Dilger <adilger.kernel@xxxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Joonsoo Kim <js1304@xxxxxxxxx>
Cc: Gunho Lee <gunho.lee@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/jbd/journal.c | 2 +-
fs/jbd2/journal.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff -puN fs/jbd/journal.c~jbd-jbd2-use-non-movable-memory-for-the-jbd-superblock fs/jbd/journal.c
--- a/fs/jbd/journal.c~jbd-jbd2-use-non-movable-memory-for-the-jbd-superblock
+++ a/fs/jbd/journal.c
@@ -886,7 +886,7 @@ journal_t * journal_init_inode (struct i
goto out_err;
}
- bh = __getblk(journal->j_dev, blocknr, journal->j_blocksize);
+ bh = getblk_unmovable(journal->j_dev, blocknr, journal->j_blocksize);
if (!bh) {
printk(KERN_ERR
"%s: Cannot get buffer for journal superblock\n",
diff -puN fs/jbd2/journal.c~jbd-jbd2-use-non-movable-memory-for-the-jbd-superblock fs/jbd2/journal.c
--- a/fs/jbd2/journal.c~jbd-jbd2-use-non-movable-memory-for-the-jbd-superblock
+++ a/fs/jbd2/journal.c
@@ -1237,7 +1237,7 @@ journal_t * jbd2_journal_init_inode (str
goto out_err;
}
- bh = __getblk(journal->j_dev, blocknr, journal->j_blocksize);
+ bh = getblk_unmovable(journal->j_dev, blocknr, journal->j_blocksize);
if (!bh) {
printk(KERN_ERR
"%s: Cannot get buffer for journal superblock\n",
_
Patches currently in -mm which might be from gioh.kim@xxxxxxx are
fsc-support-buffer-cache-allocations-with-gfp-modifiers.patch
ext4-use-non-movable-memory-for-the-ext4-superblock.patch
jbd-jbd2-use-non-movable-memory-for-the-jbd-superblock.patch
linux-next.patch
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