From b7f204cca4b7155f47e64555614b1f534a53737e Mon Sep 17 00:00:00 2001 From: Jaegeuk Kim Date: Wed, 25 Feb 2015 19:54:48 -0800 Subject: [PATCH] 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: Jaegeuk Kim --- fs/f2fs/data.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index 62e31b2aa131..389fda772e69 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -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; -- 2.20.1