Re: [GIT PULL] io_uring epoll reaping support

[Jens Axboe <axboe@kernel.dk>]

On 3/27/25 5:47 AM, Jens Axboe wrote:
> Hi Linus,
> 
> This sits on top of the recently sent out zero-copy rx pull request.
> 
> This adds support for reading epoll events via io_uring. While this may
> seem counter-intuitive (and/or productive), the reasoning here is that
> quite a few existing epoll event loops can easily do a partial
> conversion to a completion based model, but are still stuck with one (or
> few) event types that remain readiness based. For that case, they then
> need to add the io_uring fd to the epoll context, and continue to rely
> on epoll_wait(2) for waiting on events. This misses out on the finer
> grained waiting that io_uring can do, to reduce context switches and
> wait for multiple events in one batch reliably.
> 
> With adding support for reaping epoll events via io_uring, the whole
> legacy readiness based event types can still be reaped via epoll, with
> the overall waiting in the loop be driven by io_uring.
> 
> Relies on a prep patch that went in via the VFS tree already. Please
> pull!

And even with having prepared this earlier, guess a big conference dinner
was enough to still make me mess this up. The correct git location is of
course:

   git://git.kernel.dk/linux.git for-6.15/io_uring-epoll-wait-20250325

which is what I get for creating the signed tag later than the actual
PR write-up.

Everything else in the original should be fine as-is, thanks!

-- 
Jens Axboe