Re: [PATCH] btrfs: add io_uring interface for encoded reads

[Mark Harmstone <maharmstone@meta.com>]

On 12/8/24 12:26, Christoph Hellwig wrote:
> What is the point if this doesn't actually do anything but returning
> -EIOCBQUEUED?

It returns EIOCBQUEUED to say that io_uring has queued the request, and 
adds the task to io_uring's thread pool for it to be completed.

> Note that that the internals of the btrfs encoded read is built
> around kiocbs anyway, so you might as well turn things upside down,
> implement a real async io_uring cmd and just wait for it to complete
> to implement the existing synchronous ioctl.

I'd have to look into it, but that sounds like it could be an 
interesting future refactor.

Mark