> > > > > > > > OK, so I was looking into the code and indeed, reality is correct > > > and my mental model was wrong! ;) I thought that inode gets added to > > > the list of inodes for which we need to wait for data IO completion > > > during transaction commit during block allocation. And I was wrong. > > > It used to happen in > > > mpage_da_map_and_submit() until commit f3b59291a69d (ext4: remove > > > calls to > > > ext4_jbd2_file_inode() from delalloc write path) where it got > > > removed. And that was wrong because although we submit data writes > > > before dropping handle for allocating transaction and updating > > > i_size, nobody guarantees that data IO is not delayed in the block layer until > transaction commit. > > > Which seems to happen in your case. I'll send a fix. Thanks for your > > > report and persistence! > > > > > > > Thanks a lot for your feedback :-) > > Because I am not familiar with the detail of the ext4 internal code. I will try to > understand your explanation which you describe above. And have a look on > related funcations. > > Could you send the fix in this mail ? > > And whether the kernel 3.14 also have such issue, right ? > > The problem is in all kernels starting with 3.8. Attached is a patch which should fix > the issue. Can you test whether it fixes the problem for you? > > Honza > -- Yes, of course I will redo the test with the patch. And also give you feedback. Thanks. Huang weller > Jan Kara <jack@xxxxxxxx> > SUSE Labs, CR -- 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
