linux-kernel - Re: Rich man's version of AIO on Linux 2.6.x?

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Date:	Sat, 23 May 2009 14:45:21 +0200
From:	Leon Woestenberg <leon.woestenberg@...il.com>
To:	Michal Hocko <mhocko@...e.cz>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	devel@...uxdriverproject.org
Subject: Re: Rich man's version of AIO on Linux 2.6.x?

Hello,

On Fri, May 22, 2009 at 4:54 PM, Michal Hocko <mhocko@...e.cz> wrote:
> On Fri 22-05-09 02:59:53, Leon Woestenberg wrote:
>> On the state-of-art of asynchronous I/O in Linux. I understand we have
>> full support for AIO in the Linux 2.6.x kernel but I cannot find how
>> to use it from user space.
>>
>> I would like to exploit AIO in hardware and the device driver for it,
>> by keeping the hardware performing I/O at all times (no setup latency
>> between requests by allowing multiple
>> I/O requests to be queued in hardware). Note this is a character
>> device, not a filesystem.
>
> Check the libaio library (io_submit and friends)
>

Thanks, I checked the libaio library. It does not support the POSIX
interface, which I'ld like to use to keep things portable.

The http://www.bullopensource.org/posix/ library is more promising in
that regard but it doesn't seem maintained.

Regards,
-- 
Leon
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