linux-kernel - [PATCH 4.19 338/361] btrfs: release metadata before running delayed refs

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Date:   Sun, 11 Nov 2018 14:21:25 -0800
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Omar Sandoval <osandov@...com>,
        Liu Bo <bo.liu@...ux.alibaba.com>,
        Nikolay Borisov <nborisov@...e.com>,
        Josef Bacik <josef@...icpanda.com>,
        David Sterba <dsterba@...e.com>
Subject: [PATCH 4.19 338/361] btrfs: release metadata before running delayed refs

4.19-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Josef Bacik <josef@...icpanda.com>

commit f45c752b65af46bf42963295c332865d95f97fff upstream.

We want to release the unused reservation we have since it refills the
delayed refs reserve, which will make everything go smoother when
running the delayed refs if we're short on our reservation.

CC: stable@...r.kernel.org # 4.4+
Reviewed-by: Omar Sandoval <osandov@...com>
Reviewed-by: Liu Bo <bo.liu@...ux.alibaba.com>
Reviewed-by: Nikolay Borisov <nborisov@...e.com>
Signed-off-by: Josef Bacik <josef@...icpanda.com>
Signed-off-by: David Sterba <dsterba@...e.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 fs/btrfs/transaction.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -1929,6 +1929,9 @@ int btrfs_commit_transaction(struct btrf
 		return ret;
 	}
 
+	btrfs_trans_release_metadata(trans);
+	trans->block_rsv = NULL;
+
 	/* make a pass through all the delayed refs we have so far
 	 * any runnings procs may add more while we are here
 	 */
@@ -1938,9 +1941,6 @@ int btrfs_commit_transaction(struct btrf
 		return ret;
 	}
 
-	btrfs_trans_release_metadata(trans);
-	trans->block_rsv = NULL;
-
 	cur_trans = trans->transaction;
 
 	/*