linux-kernel - Re: [PATCH 0/5] Initial support for polled IO

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Date:	Fri, 6 Nov 2015 22:41:28 +0000
From:	Keith Busch <keith.busch@...el.com>
To:	Jens Axboe <axboe@...com>
Cc:	linux-kernel@...r.kernel.org, linux-block@...r.kernel.org,
	hch@...radead.org
Subject: Re: [PATCH 0/5] Initial support for polled IO

On Fri, Nov 06, 2015 at 10:20:18AM -0700, Jens Axboe wrote:
> Hi,
> 
> This is a basic framework for supporting polled IO with the block
> layer stack, and added support for sync O_DIRECT IO and the NVMe
> driver.
> 
> There are a few things missing to truly productize this, but it's
> very useful for testing. For now, it's a per-device opt-in feature.
> To enable it, you echo 1 to /sys/block/<dev>/queue/io_poll.

This really looks good. I verified similar performance improvements on
various NVMe controller types as well.

Acked-by: Keith Busch <keith.busch@...el.com>
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