Everybody know that writeback mode for ext3 is potentially result in stale data in case of unclean umount. The same is true for ext4 with nodelalloc. But as far as i can see things is getting better in case of delalloc. In case of delalloc we have following calltrace: [writeback thread] ext4_da_writepages journal_start() ext4_map_blocks() -> real block allocation mpage_da_submit_io() -> submit_bh() -> submit_bio() journal_stop() So journal will be closed only after data was issued. And if journal->j_dev == journal->j_fs_dev (which is usually the case) data will be serialized with metadata. So it looks like it is impassible to see stale data even after unclean umount. Do I miss something? May be this was already discussed before, if so please post a link to previous discussion. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
