Re: [PATCH 2/3] io_uring: Fix XArray usage in io_uring_add_task_file
From: Matthew Wilcox
Date: Fri Oct 09 2020 - 13:37:22 EST
On Fri, Oct 09, 2020 at 08:57:55AM -0600, Jens Axboe wrote:
> > + if (unlikely(!cur_uring)) {
> > int ret;
> >
> > ret = io_uring_alloc_task_context(current);
> > if (unlikely(ret))
> > return ret;
> > }
>
> I think this is missing a:
>
> cur_uring = current->io_uring;
>
> after the successful io_uring_alloc_task(). I'll also rename it to tctx
> like what is used in other spots.
Quite right! I should have woken up a little bit more before writing code.
> Apart from that, series looks good to me, thanks Matthew!
NP. At some point, I'd like to understand a bit better how you came
to write the code the way you did, so I can improve the documentation.
Maybe I just need to strengthen the warnings to stay away from the
advanced API unless you absolutely need it.