f2fs: account read IOs and use IO counts for is_idle
This patch adds issued read IO counts which is under block layer.
Chao modified a bit, since:
Below race can cause reversed reference on F2FS_RD_DATA, there is
the same issue in f2fs_submit_page_bio(), fix them by relocate
__submit_bio() and inc_page_count.
Thread A Thread B
- f2fs_write_begin
- f2fs_submit_page_read
- __submit_bio
- f2fs_read_end_io
- __read_end_io
- dec_page_count(, F2FS_RD_DATA)
- inc_page_count(, F2FS_RD_DATA)
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
3 files changed
