From: tytso@mit.edu
To: Andreas Dilger <adilger@sun.com>
Cc: linux-ext4@vger.kernel.org,
Steven Whitehouse <swhiteho@redhat.com>,
linux-fsdevel@vger.kernel.org
Subject: Motion to nuke FS_DIRECTIO_FL
Date: Mon, 25 Jan 2010 03:06:10 -0500 [thread overview]
Message-ID: <20100125080610.GD4372@thunk.org> (raw)
In-Reply-To: <E1520682-CD9F-445E-AF33-D5FCDABA1FF8@sun.com>
On Sun, Jan 24, 2010 at 11:18:47PM -0700, Andreas Dilger wrote:
>
> It doesn't seem that ext2/3/4 are using the 0x00100000 value itself,
> but it seems the VFS is using this value for FS_DIRECTIO_FL. Should
> we reserve this in the ext4 flags also, to avoid collisions? I'm
> not sure what that flag is for, possibly to force all IO to the file
> to be uncached?
Hmm, absolutely nothing seems to use FS_DIRECTIO_FL; it looks like it
was introduced by GFS2 in commit 128e5eba in 2006 and then dropped in
commit c9f6a6bb in 2008, but we never killed the FS_DIRECTIO_FL flag
itself in include/linux/fs.h.
The summary line for c9f6a6bb is a bit amusing:
[GFS2] Remove support for unused and pointless flag
Heh.
Sounds like we should just kill it. Any objections?
- Ted
next parent reply other threads:[~2010-01-25 8:06 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20090906092546.GU4197@webber.adilger.int>
[not found] ` <20100124194839.GB4372@thunk.org>
[not found] ` <E1520682-CD9F-445E-AF33-D5FCDABA1FF8@sun.com>
2010-01-25 8:06 ` tytso [this message]
2010-01-25 9:31 ` Motion to nuke FS_DIRECTIO_FL Steven Whitehouse
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