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ext4: clear buffer_uninit flag when submitting IO

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Currently noone cleared buffer_uninit flag. This results in writeback
needlessly marking io_end as needing extent conversion scanning extent
tree for extents to convert. So clear the buffer_uninit flag once the
buffer is submitted for IO and the flag is transformed into
EXT4_IO_END_UNWRITTEN flag.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Zheng Liu <wenqing.lz@taobao.com>
This commit is contained in:
Jan Kara 2013-04-12 00:03:19 -04:00 committed by Theodore Ts'o
parent 4eec708d26
commit 7b001d6a0c
1 changed files with 1 additions and 1 deletions
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2
fs/ext4/page-io.c
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@ -387,7 +387,7 @@ submit_and_retry:
if (ret != bh->b_size)
goto submit_and_retry;
io_end = io->io_end;
if (buffer_uninit(bh))
if (test_clear_buffer_uninit(bh))
ext4_set_io_unwritten_flag(inode, io_end);
io_end->size += bh->b_size;
io->io_next_block++;