From: Darrick J. Wong <darrick.wong@oracle.com>
Date: Sun, 6 Mar 2016 22:32:14 +0000 (+1100)
Subject: xfs: ioends require logically contiguous file offsets
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=0df61da8ac5b7acb1db6cee142822ebe4724c739;p=deliverable%2Flinux.git

xfs: ioends require logically contiguous file offsets

We need to create a new ioend if the current writepage call isn't
logically contiguous with the range contained in the previous ioend.
Hopefully writepage gets called in order of increasing file offset.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
---

diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c
index 46dc9211bae7..b125f9019145 100644
--- a/fs/xfs/xfs_aops.c
+++ b/fs/xfs/xfs_aops.c
@@ -520,7 +520,8 @@ xfs_add_to_ioend(
 	struct list_head	*iolist)
 {
 	if (!wpc->ioend || wpc->io_type != wpc->ioend->io_type ||
-	    bh->b_blocknr != wpc->last_block + 1) {
+	    bh->b_blocknr != wpc->last_block + 1 ||
+	    offset != wpc->ioend->io_offset + wpc->ioend->io_size) {
 		struct xfs_ioend	*new;
 
 		if (wpc->ioend)