From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoph Hellwig <hch@infradead.org>
Subject: Re: File perforation.
Date: Sat, 11 Jan 2003 09:47:43 +0000
Sender: linux-fsdevel-owner@vger.kernel.org
Message-ID: <20030111094743.A22074@infradead.org>
References: <21551.1042063560@passion.cambridge.redhat.com> <20030108225551.G26554@parcelfarce.linux.theplanet.co.uk>
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Cc: David Woodhouse <dwmw2@infradead.org>,
	linux-fsdevel@vger.kernel.org
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To: Matthew Wilcox <willy@debian.org>
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In-Reply-To: <20030108225551.G26554@parcelfarce.linux.theplanet.co.uk>; from willy@debian.org on Wed, Jan 08, 2003 at 10:55:51PM +0000
List-Id: linux-fsdevel.vger.kernel.org

On Wed, Jan 08, 2003 at 10:55:51PM +0000, Matthew Wilcox wrote:
> On Wed, Jan 08, 2003 at 10:06:00PM +0000, David Woodhouse wrote:
> > I've been resisting these requests because I really don't want to do it 
> > with an ioctl on the file. Only if we can have a generic sys_perforate() 
> > would I really want to do it.
> 
> SGI have an fcntl to do this:
> 
> http://techpubs.sgi.com/library/tpl/cgi-bin/getdoc.cgi?coll=0650&db=man&fname=/usr/share/catman/p_man/cat2/standard/fcntl.z
> 
> F_FREESP

Or the XFS_IOC_FREESP ioctl on XFS/Linux..