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| author | Richard Kennedy <richard@rsk.demon.co.uk> | 2009-12-25 15:46:07 -0500 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2009-12-25 15:46:07 -0500 |
| commit | 2faf2e19dd0e060eeb32442858ef495ac3083277 (patch) | |
| tree | cd8c28414036f2d8ad45663371e1544d4efad5d4 /fs | |
| parent | 6d3b82f2d31f22085e5711b28dddcb9fb3d97a25 (diff) | |
| download | blackbird-op-linux-2faf2e19dd0e060eeb32442858ef495ac3083277.tar.gz blackbird-op-linux-2faf2e19dd0e060eeb32442858ef495ac3083277.zip | |
ext4: return correct wbc.nr_to_write in ext4_da_writepages
When ext4_da_writepages increases the nr_to_write in writeback_control
then it must always re-base the return value. Originally there was a
(misguided) attempt prevent wbc.nr_to_write from going negative. In
fact, it's necessary to allow nr_to_write to be negative so that
wb_writeback() can correctly calculate how many pages were actually
written.
Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/ext4/inode.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 282621f18c10..3e3b45458ef8 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -2967,8 +2967,7 @@ retry: out_writepages: if (!no_nrwrite_index_update) wbc->no_nrwrite_index_update = 0; - if (wbc->nr_to_write > nr_to_writebump) - wbc->nr_to_write -= nr_to_writebump; + wbc->nr_to_write -= nr_to_writebump; wbc->range_start = range_start; trace_ext4_da_writepages_result(inode, wbc, ret, pages_written); return ret; |
