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From: Keith Busch <>
To: "Ober, Frank" <>
Cc: "" <>,
	"Rajendiran, Swetha" <>,
	"Liang, Mark" <>,
	"Derrick, Jonathan" <>,
	"" <>
Subject: Re: Polled io for Linux kernel 5.x
Date: Sat, 21 Dec 2019 06:20:49 +0900	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

On Thu, Dec 19, 2019 at 09:59:14PM +0000, Ober, Frank wrote:
> Thanks Keith, it makes sense to reserve and set it up uniquely if you
> can save hw interrupts. But why would io_uring then not need these
> queues, because a stack trace I ran shows without the special queues I
> am still entering bio_poll. With pvsync2 I can only do polled io with
> the poll_queues?

Polling can happen only if you have polled queues, so io_uring is not
accomplishing anything by calling iopoll. I don't see an immediately
good way to pass that information up to io_uring, though.

linux-nvme mailing list

  reply	other threads:[~2019-12-20 21:21 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-19 19:25 Polled io for Linux kernel 5.x Ober, Frank
2019-12-19 20:52 ` Keith Busch
2019-12-19 21:59   ` Ober, Frank
2019-12-20 21:20     ` Keith Busch [this message]
2019-12-31 19:06       ` Ober, Frank

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