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Commit 5768dcdd authored by Fan Li's avatar Fan Li Committed by Jaegeuk Kim
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f2fs: change the timing of f2fs_wait_on_page_writeback 



some backing devices need pages to be stable during writeback. It doesn't
matter if
the page is completely overwritten or already uptodate, it needs to wait
before write.

Signed-off-by: default avatarFan li <fanofcode.li@samsung.com>
Reviewed-by: default avatarChao Yu <chao2.yu@samsung.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent edb27dee

fs/f2fs/data.c

+2 −2
Original line number Diff line number Diff line
@@ -1383,13 +1383,13 @@ static int f2fs_write_begin(struct file *file, struct address_space *mapping, 
	f2fs_put_dnode(&dn);

	f2fs_unlock_op(sbi);



	f2fs_wait_on_page_writeback(page, DATA);



	if (len == PAGE_CACHE_SIZE)

		goto out_update;

	if (PageUptodate(page))

		goto out_clear;



	f2fs_wait_on_page_writeback(page, DATA);



	if ((pos & PAGE_CACHE_MASK) >= i_size_read(inode)) {

		unsigned start = pos & (PAGE_CACHE_SIZE - 1);

		unsigned end = start + len;