From: Eric Sandeen <sandeen@redhat.com>
To: "Bradley C. Kuszmaul" <kuszmaul@gmail.com>
Cc: linux-ext4 <linux-ext4@vger.kernel.org>
Subject: Re: hole punching in ext4
Date: Tue, 22 Jan 2013 09:30:14 -0600 [thread overview]
Message-ID: <50FEB086.4080101@redhat.com> (raw)
In-Reply-To: <CAKSyJXdbwtOQi==rPZ3nS72bLb9wd0rrmt8RTNPJMUCph-B1Ow@mail.gmail.com>
On 1/22/13 8:34 AM, Bradley C. Kuszmaul wrote:
> Hi,
>
> Do any of the ext file systems support hole punching?
ext4 does:
[esandeen@host linux-2.6]$ grep -l FALLOC_FL_PUNCH_HOLE fs/ext?/*.[ch]
fs/ext4/extents.c
> If so, do the redhat distributions support it?
Normally a question for Red Hat support, but yes, recent RHEL6
supports punch in ext4.
> Can someone provide an example of a
> program that punches a hole in a file in an ext4 file system?
Upstream fallocate command does with the -p option, for example.
-Eric
> -Bradley
> --
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next prev parent reply other threads:[~2013-01-22 15:53 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CAKSyJXfvTFjGMO2ZZPsnSjc_fnUzfs2oMrYf7UQoPvO0=98FxA@mail.gmail.com>
2013-01-22 14:34 ` hole punching in ext4 Bradley C. Kuszmaul
2013-01-22 15:30 ` Eric Sandeen [this message]
2013-01-22 16:20 ` Zheng Liu
2013-01-22 23:50 ` Bradley C. Kuszmaul
2013-01-23 0:03 ` Andreas Dilger
2013-01-23 1:38 ` Eric Sandeen
2013-01-22 16:38 ` Carlos Maiolino
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