Commit ca0a81b3 authored Jun 12, 2014 by Chao Yu Committed by Jaegeuk Kim Jul 09, 2014

f2fs: avoid to truncate non-updated page partially



After we call find_data_page in truncate_partial_data_page, we could not
guarantee this page is updated or not as error may occurred in lower layer.

We'd better check status of the page to avoid this no updated page be
writebacked to device.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

parent 5576cd6c

fs/f2fs/file.c

+6 −4

Original line number	Diff line number	Diff line
		@@ -380,13 +380,15 @@ static void truncate_partial_data_page(struct inode *inode, u64 from)
		return;

		lock_page(page);
		if (unlikely(page->mapping != inode->i_mapping)) {
		f2fs_put_page(page, 1);
		return;
		}
		if (unlikely(!PageUptodate(page) \|\|
		page->mapping != inode->i_mapping))
		goto out;

		f2fs_wait_on_page_writeback(page, DATA);
		zero_user(page, offset, PAGE_CACHE_SIZE - offset);
		set_page_dirty(page);

		out:
		f2fs_put_page(page, 1);
		}