linux-kernel - [PATCH 4.9 35/50] btrfs: release metadata before running delayed refs

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Message-Id: <20181204103716.261407283@linuxfoundation.org>
Date:   Tue,  4 Dec 2018 11:50:30 +0100
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>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.9 35/50] btrfs: release metadata before running delayed refs

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

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

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: Sasha Levin <sashal@...nel.org>
---
 fs/btrfs/transaction.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 9517de0e668c..fd6c74662e9a 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -1924,6 +1924,9 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
 		return ret;
 	}
 
+	btrfs_trans_release_metadata(trans, root);
+	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
 	 */
@@ -1933,9 +1936,6 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
 		return ret;
 	}
 
-	btrfs_trans_release_metadata(trans, root);
-	trans->block_rsv = NULL;
-
 	cur_trans = trans->transaction;
 
 	/*
-- 
2.17.1