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| author | Tao Ma <boyu.mt@taobao.com> | 2011-10-31 17:30:44 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2011-10-31 17:30:44 -0400 |
| commit | 0edeb71dc9133bfb505d3bf59642e07cd936613e (patch) | |
| tree | bcb68e2676d9bba1e4e4e28fb1ba8d382caf26eb /fs/ext4/page-io.c | |
| parent | b82e384c7bb9a19036b4daf58fa216df7cd48aa0 (diff) | |
| download | lwn-0edeb71dc9133bfb505d3bf59642e07cd936613e.tar.gz lwn-0edeb71dc9133bfb505d3bf59642e07cd936613e.zip | |
ext4: Create helper function for EXT4_IO_END_UNWRITTEN and i_aiodio_unwritten
EXT4_IO_END_UNWRITTEN flag set and the increase of i_aiodio_unwritten
should be done simultaneously since ext4_end_io_nolock always clear
the flag and decrease the counter in the same time.
We have found some bugs that the flag is set while leaving
i_aiodio_unwritten unchanged(commit 32c80b32c053d). So this patch just tries
to create a helper function to wrap them to avoid any future bug.
The idea is inspired by Eric.
Cc: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/page-io.c')
| -rw-r--r-- | fs/ext4/page-io.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c index 9eebf44646f6..7ce1d0b19c94 100644 --- a/fs/ext4/page-io.c +++ b/fs/ext4/page-io.c @@ -336,10 +336,8 @@ submit_and_retry: if ((io_end->num_io_pages >= MAX_IO_PAGES) && (io_end->pages[io_end->num_io_pages-1] != io_page)) goto submit_and_retry; - if (buffer_uninit(bh) && !(io_end->flag & EXT4_IO_END_UNWRITTEN)) { - io_end->flag |= EXT4_IO_END_UNWRITTEN; - atomic_inc(&EXT4_I(inode)->i_aiodio_unwritten); - } + if (buffer_uninit(bh)) + ext4_set_io_unwritten_flag(inode, io_end); io->io_end->size += bh->b_size; io->io_next_block++; ret = bio_add_page(io->io_bio, bh->b_page, bh->b_size, bh_offset(bh)); |