linux-kernel - Re: [RFC] VFS: File System Mount Wide O

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Message-ID: <20120904232858.GB11953@lenny.home.zabbo.net>
Date:	Tue, 4 Sep 2012 16:28:58 -0700
From:	Zach Brown <zab@...bo.net>
To:	Jan Kara <jack@...e.cz>
Cc:	Li Wang <liwang@...t.edu.cn>, viro@...iv.linux.org.uk,
	axboe@...nel.dk, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC] VFS: File System Mount Wide O_DIRECT Support

> > The idea is simple, leave the desicion for the file system user to enable file system mount 
> > wide O_DIRECT support with a new mount option, for example,

>   I believe a better approach to your problem is actually to enable
> loopback device driver to use direct IO. Someone was actually working on
> this but I'm not sure where this ended up.

Dave's been working on getting those patches merged.  I'm also not sure
where the work currently is, but here's an older posting:

  http://lwn.net/Articles/489647/

- z
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