diff mbox series

[RFC,v2,8/9] xfs: Rewrite retried read

Message ID 20190213095044.29628-9-bob.liu@oracle.com (mailing list archive)
State New, archived
Headers show
Series Block/XFS: Support alternative mirror device retry | expand

Commit Message

Bob Liu Feb. 13, 2019, 9:50 a.m. UTC 
From: Allison Henderson <allison.henderson@oracle.com>

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

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

diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c
index 2c250221cb78..e54dbc776d15 100644
--- a/fs/xfs/xfs_buf.c
+++ b/fs/xfs/xfs_buf.c
@@ -861,6 +861,14 @@  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;
 	}