From ca0a81b397b5f153ac2a9880c5e85b08b0447e4e Mon Sep 17 00:00:00 2001 From: Chao Yu Date: Thu, 12 Jun 2014 13:31:50 +0800 Subject: [PATCH] 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 Signed-off-by: Jaegeuk Kim --- fs/f2fs/file.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 7d8b96275092..36fa50587bb8 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -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); } -- 2.20.1