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Commit b7f204cc authored by Jaegeuk Kim's avatar Jaegeuk Kim
Browse files

f2fs: check its block allocation to avoid producing wrong dirty pages 



If a page is cached but its block was deallocated, we don't need to make
the page dirty again by gc and truncate_partial_data_page.

In that case, it needs to check its block allocation all the time instead
of giving up-to-date page.

Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 2bca1e23

fs/f2fs/data.c

+9 −1
Original line number Diff line number Diff line
@@ -813,11 +813,19 @@ struct page *find_data_page(struct inode *inode, pgoff_t index, bool sync) 
		.rw = sync ? READ_SYNC : READA,

	};



	/*

	 * If sync is false, it needs to check its block allocation.

	 * This is need and triggered by two flows:

	 *   gc and truncate_partial_data_page.

	 */

	if (!sync)

		goto search;



	page = find_get_page(mapping, index);

	if (page && PageUptodate(page))

		return page;

	f2fs_put_page(page, 0);



search:

	if (f2fs_lookup_extent_cache(inode, index, &ei)) {

		dn.data_blkaddr = ei.blk + index - ei.fofs;

		goto got_it;