From: Michal Hocko Subject: [RFC -v2 6/8] ext3: Do not abort journal prematurely Date: Tue, 18 Aug 2015 12:39:37 +0200 Message-ID: <20150818103937.GE5033@dhcp22.suse.cz> References: <1438768284-30927-1-git-send-email-mhocko@kernel.org> <1438768284-30927-7-git-send-email-mhocko@kernel.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, Andrew Morton , Johannes Weiner , Tetsuo Handa , Dave Chinner , Theodore Ts'o , linux-btrfs@vger.kernel.org, linux-ext4@vger.kernel.org, Jan Kara To: LKML Return-path: Content-Disposition: inline In-Reply-To: <1438768284-30927-7-git-send-email-mhocko@kernel.org> Sender: owner-linux-mm@kvack.org List-Id: linux-ext4.vger.kernel.org From: Michal Hocko journal_get_undo_access is relying on GFP_NOFS allocation yet it is essential for the journal transaction: [ 83.256914] journal_get_undo_access: No memory for committed data [ 83.258022] EXT3-fs: ext3_free_blocks_sb: aborting transaction: Out of memory in __ext3_journal_get_undo_access [ 83.259785] EXT3-fs (hdb1): error in ext3_free_blocks_sb: Out of memory [ 83.267130] Aborting journal on device hdb1. [ 83.292308] EXT3-fs (hdb1): error: ext3_journal_start_sb: Detected aborted journal [ 83.293630] EXT3-fs (hdb1): error: remounting filesystem read-only Since "mm: page_alloc: do not lock up GFP_NOFS allocations upon OOM" these allocation requests are allowed to fail so we need to use __GFP_NOFAIL to imitate the previous behavior. Signed-off-by: Michal Hocko --- fs/jbd/transaction.c | 11 ++--------- 1 file changed, 2 insertions(+), 9 deletions(-) diff --git a/fs/jbd/transaction.c b/fs/jbd/transaction.c index bf7474deda2f..2151b80276c3 100644 --- a/fs/jbd/transaction.c +++ b/fs/jbd/transaction.c @@ -886,15 +886,8 @@ int journal_get_undo_access(handle_t *handle, struct buffer_head *bh) goto out; repeat: - if (!jh->b_committed_data) { - committed_data = jbd_alloc(jh2bh(jh)->b_size, GFP_NOFS); - if (!committed_data) { - printk(KERN_ERR "%s: No memory for committed data\n", - __func__); - err = -ENOMEM; - goto out; - } - } + if (!jh->b_committed_data) + committed_data = jbd_alloc(jh2bh(jh)->b_size, GFP_NOFS | __GFP_NOFAIL); jbd_lock_bh_state(bh); if (!jh->b_committed_data) { -- 2.5.0 -- Michal Hocko SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org