Re: [RFC for-next v2 0/4] enable pcpu bio caching for IRQ I/O

[Pavel Begunkov]

On 10/20/22 09:32, Christoph Hellwig wrote:
> On Tue, Oct 18, 2022 at 08:50:54PM +0100, Pavel Begunkov wrote:
> > This series implements bio pcpu caching for normal / IRQ-driven I/O
> > extending REQ_ALLOC_CACHE currently limited to iopoll. The allocation side
> > still only works from non-irq context, which is the reason it's not enabled
> > by default, but turning it on for other users (e.g. filesystems) is
> > as a matter of passing a flag.
> >
> > t/io_uring with an Optane SSD setup showed +7% for batches of 32 requests
> > and +4.3% for batches of 8.
>
> This looks much nicer to me than the previous attempt exposing the bio
> internals to io_uring, thanks.

Yeah, I saw the one Jens posted before but I wanted this one to be more
generic, i.e. applicable not only to io_uring. Thanks for taking a look.

--
Pavel Begunkov