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Date: Wed, 11 Jan 2006 13:10:58 -0600 (CST)
From: David Lloyd <dmlloyd@tds.net>
To: Kenny Simpson <theonetruekenny@yahoo.com>
cc: linux kernel <linux-kernel@vger.kernel.org>
Subject: Re: Is user-space AIO dead?
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On Wed, 11 Jan 2006, Kenny Simpson wrote:

> --- David Lloyd <dmlloyd@tds.net> wrote:
>> Wouldn't nonblocking I/O on regular files be nice?
>
> Yes it could be.  As I understand it, regular file writes (not O_DIRECT) 
> are only to the page cache and only block when there is memory pressure 
> (so it is more of a throttle).

If you were however using O_DIRECT or O_SYNC, you would then have a 
mechanism to know when your writes have made it to disk, which might be 
useful for transactional systems.

- D