Re: [PATCH v1 00/11] io_uring: add kernel-managed buffer rings

[Joanne Koong <joannelkoong@gmail.com>]

On Mon, Feb 9, 2026 at 4:55 PM Jens Axboe <axboe@kernel.dk> wrote:
>
> On 2/9/26 5:28 PM, Joanne Koong wrote:
> > Currently, io_uring buffer rings require the application to allocate and
> > manage the backing buffers. This series introduces kernel-managed buffer
> > rings, where the kernel allocates and manages the buffers on behalf of
> > the application.
> >
> > This is split out from the fuse over io_uring series in [1], which needs the
> > kernel to own and manage buffers shared between the fuse server and the
> > kernel.
> >
> > This series is on top of the for-next branch in Jens' io-uring tree. The
> > corresponding liburing changes are in [2] and will be submitted after the
> > changes in this patchset are accepted.
>
> Generally looks pretty good - for context, do you have a branch with
> these patches and the users on top too? Makes it a bit easier for cross
> referencing, as some of these really do need an exposed user to make a
> good judgement on the helpers.

Thanks for reviewing the patches. The branch containing the userside
changes on top of these patches is in [1]. I'll make the changes you
pointed out in your other comments as part of v2. Once the discussion
with Pavel is resolved / figured out with the changes he wants for v2,
I'll submit v2.

Thanks,
Joanne

[1] https://github.com/joannekoong/linux/commits/fuse_zero_copy/

>
> I know there's the older series, but I'm assuming the latter patches
> changed somewhat too, and it'd be nicer to look at a current set rather
> than go back to the older ones.
>
> --
> Jens Axboe