linux-ext4 - Re: [PATCH 0/3] ext4: introduce two new ioctls

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Message-ID: <20130624141439.GA8275@gmail.com>
Date:	Mon, 24 Jun 2013 22:14:39 +0800
From:	Zheng Liu <gnehzuil.liu@...il.com>
To:	"Sidorov, Andrei" <Andrei.Sidorov@...isi.com>
Cc:	Namjae Jeon <linkinjeon@...il.com>,
	Christoph Hellwig <hch@...radead.org>,
	Dave Chinner <david@...morbit.com>,
	Eric Sandeen <esandeen@...hat.com>,
	Andreas Dilger <adilger@...ger.ca>,
	"tytso@....edu" <tytso@....edu>,
	"adilger.kernel@...ger.ca" <adilger.kernel@...ger.ca>,
	"linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>,
	"a.sangwan@...sung.com" <a.sangwan@...sung.com>,
	Namjae Jeon <namjae.jeon@...sung.com>
Subject: Re: [PATCH 0/3] ext4: introduce two new ioctls

On Mon, Jun 24, 2013 at 10:37:57AM +0000, Sidorov, Andrei wrote:
> On 24.06.2013 13:36, Namjae Jeon wrote:
> > Currently, we can try implementing dave's suggesstion of introducing a
> > new flag FALLOC_FL_COLLAPSE_RANGE for falloctae instead of individual
> > ioctls for both XFS and EXT4. Thanks.
> 
> Hi,
> 
> Currently PUNCH_HOLE requires KEEP_SIZE to be set as well. I think there
> is no need to invent COLLAPSE_RANGE, but instead fallocate should
> support PUNCH_HOLE without KEEP_SIZE. However I'm not sure that putting
> block alignment restriction is a right way to go.

PUNCH_HOLE without KEEP_SIZE makes sense to me.

Regards,
                                                - Zheng
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