From: Gioh Kim Subject: [PATCHv3 3/3] jbd/jbd2: allocate buffer-cache for superblock inode in non-movable area Date: Thu, 28 Aug 2014 11:33:20 +0900 Message-ID: <53FE94F0.5070401@lge.com> References: <53FE9357.6000505@lge.com> Mime-Version: 1.0 Content-Type: text/plain; charset=EUC-KR Content-Transfer-Encoding: 7bit Cc: Minchan Kim , Joonsoo Kim , =?EUC-KR?B?wMywx8ij?= To: Alexander Viro , Andrew Morton , "Paul E. McKenney" , Peter Zijlstra , Jan Kara , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Theodore Ts'o , Andreas Dilger , linux-ext4@vger.kernel.org Return-path: In-Reply-To: <53FE9357.6000505@lge.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org 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 --- fs/jbd/journal.c | 2 +- fs/jbd2/journal.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/jbd/journal.c b/fs/jbd/journal.c index 06fe11e..aab8549 100644 --- a/fs/jbd/journal.c +++ b/fs/jbd/journal.c @@ -886,7 +886,7 @@ journal_t * journal_init_inode (struct inode *inode) 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 --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c index 67b8e30..65bd3b1 100644 --- a/fs/jbd2/journal.c +++ b/fs/jbd2/journal.c @@ -1237,7 +1237,7 @@ journal_t * jbd2_journal_init_inode (struct inode *inode) 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", -- 1.7.9.5