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xfs: don't clear imap_valid for a non-uptodate buffers

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Finding a buffer that isn't uptodate doesn't invalidate the mapping for
any given block.  The last_sector check will already take care of starting
another ioend as soon as we find any non-update buffer, and if the current
mapping doesn't include the next uptodate buffer the xfs_imap_valid check
will take care of it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Christoph Hellwig 2018-07-11 22:25:58 -07:00 committed by Darrick J. Wong
parent 91cdfd1761
commit c57371a16d
1 changed files with 2 additions and 7 deletions
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9
fs/xfs/xfs_aops.c
View file

@ -863,10 +863,8 @@ xfs_writepage_map(
* meaningless for holes (!mapped && uptodate), so skip
* buffers covering holes here.
*/
if (!buffer_mapped(bh) && buffer_uptodate(bh)) {
wpc->imap_valid = false;
if (!buffer_mapped(bh) && buffer_uptodate(bh))
continue;
}
if (buffer_unwritten(bh))
new_type = XFS_IO_UNWRITTEN;
@ -879,11 +877,8 @@ xfs_writepage_map(
ASSERT(buffer_mapped(bh));
/*
* This buffer is not uptodate and will not be
* written to disk. Ensure that we will put any
* subsequent writeable buffers into a new
* ioend.
* written to disk.
*/
wpc->imap_valid = false;
continue;
}