diff options
| author | David Chinner <dgc@sgi.com> | 2007-06-18 16:49:58 +1000 |
|---|---|---|
| committer | Tim Shimmin <tes@chook.melbourne.sgi.com> | 2007-07-14 15:32:49 +1000 |
| commit | effd120edb7609069cca9f3d1cb4bfae464b2f85 (patch) | |
| tree | 3183077b16d0af765bce44a4a3df5e6d37f78fc8 | |
| parent | 45c34141126a89da07197d5b89c04c6847f1171a (diff) | |
[XFS] Map unwritten extents correctly for I/o completion processing
If we have multiple unwritten extents within a single page, we fail to
tell the I/o completion construction handlers we need a new handle for the
second and subsequent blocks in the page. While we still issue the I/O
correctly, we do not have the correct ranges recorded in the ioend
structures and hence when we go to convert the unwritten extents we screw
it up.
Make sure we start a new ioend every time the mapping changes so that we
convert the correct ranges on I/O completion.
SGI-PV: 964647
SGI-Modid: xfs-linux-melb:xfs-kern:28797a
Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Tim Shimmin <tes@sgi.com>
| -rw-r--r-- | fs/xfs/linux-2.6/xfs_aops.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/fs/xfs/linux-2.6/xfs_aops.c b/fs/xfs/linux-2.6/xfs_aops.c index c097e4e6976..fd4105d662e 100644 --- a/fs/xfs/linux-2.6/xfs_aops.c +++ b/fs/xfs/linux-2.6/xfs_aops.c @@ -1010,6 +1010,8 @@ xfs_page_state_convert( if (buffer_unwritten(bh) || buffer_delay(bh) || ((buffer_uptodate(bh) || PageUptodate(page)) && !buffer_mapped(bh) && (unmapped || startio))) { + int new_ioend = 0; + /* * Make sure we don't use a read-only iomap */ @@ -1028,6 +1030,15 @@ xfs_page_state_convert( } if (!iomap_valid) { + /* + * if we didn't have a valid mapping then we + * need to ensure that we put the new mapping + * in a new ioend structure. This needs to be + * done to ensure that the ioends correctly + * reflect the block mappings at io completion + * for unwritten extent conversion. + */ + new_ioend = 1; if (type == IOMAP_NEW) { size = xfs_probe_cluster(inode, page, bh, head, 0); @@ -1047,7 +1058,7 @@ xfs_page_state_convert( if (startio) { xfs_add_to_ioend(inode, bh, offset, type, &ioend, - !iomap_valid); + new_ioend); } else { set_buffer_dirty(bh); unlock_buffer(bh); |