Commits
Jaegeuk Kim committed 1e7c48fa9a3
f2fs: avoid data race between FI_DIRTY_INODE flag and update_inode
FI_DIRTY_INODE flag is not covered by inode page lock, so it can be unset
at any time like below.
Thread #1 Thread #2
- lock_page(ipage)
- update i_fields
- update i_size/i_blocks/and so on
- set FI_DIRTY_INODE
- reset FI_DIRTY_INODE
- set_page_dirty(ipage)
In this case, we can lose the latest i_field information.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>