From: Christoph Hellwig <hch@lst.de>
To: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Christoph Hellwig <hch@lst.de>, linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH] add a FMODE flag to make XFS invisible I/O less hacky
Date: Sun, 30 Nov 2008 10:16:04 +0100 [thread overview]
Message-ID: <20081130091603.GA3315@lst.de> (raw)
In-Reply-To: <20081128113052.GS28946@ZenIV.linux.org.uk>
On Fri, Nov 28, 2008 at 11:30:52AM +0000, Al Viro wrote:
> On Fri, Nov 28, 2008 at 12:24:02PM +0100, Christoph Hellwig wrote:
> > XFS has a mode called invisble I/O that doesn't update any of the
> > timestamps. It's used for HSM-style applications and exposed through
> > the nasty open by handle ioctl.
> >
> > Instead of doing directly assignment of file operations that set an
> > internal flag for it add a new FMODE_INVISIBLE flag that we can check
> > in the normal file operations.
>
> Seeing that it's similar to O_NOATIME, why not do it in O_... space?
For now I just want to get rid of the horrible hack in XFS. Adding this
as a user-visible feature might be a good idea that those who need it
can submit.
next prev parent reply other threads:[~2008-11-30 9:16 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-28 11:24 [PATCH] add a FMODE flag to make XFS invisible I/O less hacky Christoph Hellwig
2008-11-28 11:30 ` Al Viro
2008-11-30 9:16 ` Christoph Hellwig [this message]
2008-12-02 10:19 ` Christoph Hellwig
2008-11-28 22:58 ` Andreas Dilger
2008-11-30 9:18 ` Christoph Hellwig
-- strict thread matches above, loose matches on Subject: below --
2008-12-03 17:45 Christoph Hellwig
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