linux-kernel - [PATCH v1 6/7] xfs: Rewrite retried read

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Message-Id: <1543376991-5764-7-git-send-email-allison.henderson@oracle.com>
Date:   Tue, 27 Nov 2018 20:49:50 -0700
From:   Allison Henderson <allison.henderson@...cle.com>
To:     linux-block@...r.kernel.org, linux-xfs@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Cc:     martin.petersen@...cle.com, shirley.ma@...cle.com,
        bob.liu@...cle.com, allison.henderson@...cle.com
Subject: [PATCH v1 6/7] xfs: Rewrite retried read

If we had to try more than one mirror to get a successful
read, then write that buffer back to correct the bad mirro

Signed-off-by: Allison Henderson <allison.henderson@...cle.com>
---
 fs/xfs/xfs_buf.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c
index f102d01..81f6491 100644
--- a/fs/xfs/xfs_buf.c
+++ b/fs/xfs/xfs_buf.c
@@ -847,6 +847,14 @@ xfs_buf_read_map(
 
 		}
 retry_done:
+
+		/*
+		 * if we had to try more than one mirror to sucessfully read
+		 * the buffer, write the buffer back
+		 */
+		if (!bp->b_error && i > 0)
+			xfs_bwrite(bp);
+
 		return bp;
 	}
 
-- 
2.7.4