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 <[email protected]>
---
fs/f2fs/data.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index c03bd0c2ed22..8b9240762156 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -480,10 +480,10 @@ int f2fs_submit_page_bio(struct f2fs_io_info *fio)
}
bio_set_op_attrs(bio, fio->op, fio->op_flags);
- __submit_bio(fio->sbi, bio, fio->type);
-
inc_page_count(fio->sbi, is_read_io(fio->op) ?
__read_io_type(page): WB_DATA_TYPE(fio->page));
+
+ __submit_bio(fio->sbi, bio, fio->type);
return 0;
}
@@ -612,8 +612,8 @@ static int f2fs_submit_page_read(struct inode *inode,
struct page *page,
return -EFAULT;
}
ClearPageError(page);
- __submit_bio(F2FS_I_SB(inode), bio, DATA);
inc_page_count(F2FS_I_SB(inode), F2FS_RD_DATA);
+ __submit_bio(F2FS_I_SB(inode), bio, DATA);
return 0;
}
--
2.18.0.rc1
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