4.14-stable review patch. If anyone has any objections, please let me know.
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From: Chao Yu yuchao0@huawei.com
[ Upstream commit 82cf4f132e6d16dca6fc3bd955019246141bc645 ]
If config CONFIG_F2FS_FAULT_INJECTION is on, for both read or write path we will call find_lock_page() to get the page, but for read path, it missed to passing FGP_ACCESSED to allocator to active the page in LRU list, result in being reclaimed in advance incorrectly, fix it.
Reported-by: Xianrong Zhou zhouxianrong@huawei.com Signed-off-by: Chao Yu yuchao0@huawei.com Signed-off-by: Jaegeuk Kim jaegeuk@kernel.org Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/f2fs/f2fs.h | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
--- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -1766,8 +1766,13 @@ static inline struct page *f2fs_grab_cac pgoff_t index, bool for_write) { #ifdef CONFIG_F2FS_FAULT_INJECTION - struct page *page = find_lock_page(mapping, index); + struct page *page;
+ if (!for_write) + page = find_get_page_flags(mapping, index, + FGP_LOCK | FGP_ACCESSED); + else + page = find_lock_page(mapping, index); if (page) return page;