On Tue, Oct 04, 2016 at 10:13:24AM +0200, Jan Kara wrote: > But frankly it looks like a nasty catch that iocb->ki_filp can go away > under you in the AIO case. Do I get it right that this means there must be > some other thread closing your fd while the read is running, right? Yes, that's what generic/323 tests. > Also it seems that file_end_write(file) call in aio_run_iocb() is prone to > the same race? Indeed. That's easy to fix by moving the file_end_write to aio_complete, though. > Won't we be better off to just to do additional get_file() / fput() pair in > the AIO submission path so that whole AIO submission path is guaranteed to > have struct file available? I understand this is very performance sensitive > path but we'll be adding just two atomic ops... I'd rather avoid those if we can. But a big comment and some refactoring in this area would be useful to make that easier to understand. -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
