Re: aio poll V22 (aka 2.0)

[Linus Torvalds]

On Mon, Aug 6, 2018 at 1:31 AM Christoph Hellwig <hch@xxxxxx> wrote:
>
> As our dear leader didn't like the ->poll_mask method this tries to
> implement the behavior using plain old ->poll which is rather painful.

I'm not seeing what's painful for this. Looking at the patches, this
is *much* more straightforward than your previous patch,

It adds refcounting to aio_iocb, but that's *much* better than messing
up every other subsystem.

Or is there some follow-up patches that are pending but you didn't
post that are the painful part? Because the diffstat says that this
second version is *way* less painful, at about 200 lines of code in a
couple of files, mostly aio, vs ~700 lines of changes all over the
place, together with a performance regression.

                 Linus