Re: (subset) [PATCHSET v4 0/7] io_uring epoll wait support

[Christian Brauner <brauner@kernel.org>]

On Wed, 19 Feb 2025 10:22:23 -0700, Jens Axboe wrote:
> One issue people consistently run into when converting legacy epoll
> event loops with io_uring is that parts of the event loop still needs to
> use epoll. And since event loops generally need to wait in one spot,
> they add the io_uring fd to the epoll set and continue to use
> epoll_wait(2) to wait on events. This is suboptimal on the io_uring
> front as there's now an active poller on the ring, and it's suboptimal
> as it doesn't give the application the batch waiting (with fine grained
> timeouts) that io_uring provides.
> 
> [...]

Preparatory patches in vfs-6.15.eventpoll with tag vfs-6.15-rc1.eventpoll.
Stable now.

---

Applied to the vfs-6.15.eventpoll branch of the vfs/vfs.git tree.
Patches in the vfs-6.15.eventpoll branch should appear in linux-next soon.

Please report any outstanding bugs that were missed during review in a
new review to the original patch series allowing us to drop it.

It's encouraged to provide Acked-bys and Reviewed-bys even though the
patch has now been applied. If possible patch trailers will be updated.

Note that commit hashes shown below are subject to change due to rebase,
trailer updates or similar. If in doubt, please check the listed branch.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git
branch: vfs-6.15.eventpoll

[1/5] eventpoll: abstract out parameter sanity checking
      https://git.kernel.org/vfs/vfs/c/6b47d35d4d9e
[2/5] eventpoll: abstract out ep_try_send_events() helper
      https://git.kernel.org/vfs/vfs/c/38d203560118
[3/5] eventpoll: add epoll_sendevents() helper
      https://git.kernel.org/vfs/vfs/c/ae3a4f1fdc2c