From: Chris Mason <chris.mason@oracle.com>
To: Andreas Dilger <adilger@dilger.ca>
Cc: liubo <liubo2009@cn.fujitsu.com>,
Linux Btrfs <linux-btrfs@vger.kernel.org>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>
Subject: Re: [RFC PATCH] Btrfs: add ioctl to set compress or cow per file/dir
Date: Thu, 24 Feb 2011 13:39:52 -0500 [thread overview]
Message-ID: <1298572774-sup-6568@think> (raw)
In-Reply-To: <EE604399-9A36-4E16-82F5-659BA93413B5@dilger.ca>
Excerpts from Andreas Dilger's message of 2011-02-24 13:37:52 -0500:
> On 2011-02-24, at 2:40 AM, liubo wrote:
> > #define FS_DIRECTIO_FL 0x00100000 /* Use direct i/o */
> > +#define FS_NOCOW_FL 0x00200000 /* Do not cow file */
> > +#define FS_COW_FL 0x00100000 /* Cow file */
> > #define FS_RESERVED_FL 0x80000000 /* reserved for ext2 lib */
>
> I'm assuming that FS_COW_FL should not be the same as FS_DIRECTIO_FL?
No, we can do DIRECTIO with COW.
-chris
next prev parent reply other threads:[~2011-02-24 18:39 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-24 9:40 [RFC PATCH] Btrfs: add ioctl to set compress or cow per file/dir liubo
2011-02-24 14:54 ` Chris Mason
2011-02-25 3:21 ` liubo
2011-02-24 18:37 ` Andreas Dilger
2011-02-24 18:39 ` Chris Mason [this message]
2011-02-25 3:33 ` liubo
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