From: "Ragnar Kjørstad" <kernel@ragnark.vestdata.no>
To: Christoph Hellwig <hch@infradead.org>,
Nikita Danilov <Nikita@Namesys.COM>,
Linus Torvalds <Torvalds@Transmeta.COM>,
Linux Kernel Mailing List <Linux-Kernel@Vger.Kernel.ORG>,
Reiserfs mail-list <Reiserfs-List@Namesys.COM>
Subject: Re: [PATCH]: reiser4 [5/8] export remove_from_page_cache()
Date: Thu, 31 Oct 2002 21:17:47 +0100 [thread overview]
Message-ID: <20021031211747.V30076@vestdata.no> (raw)
In-Reply-To: <20021031173311.GA23959@clusterfs.com>; from adilger@clusterfs.com on Thu, Oct 31, 2002 at 10:33:11AM -0700
On Thu, Oct 31, 2002 at 10:33:11AM -0700, Andreas Dilger wrote:
> On Oct 31, 2002 16:31 +0000, Christoph Hellwig wrote:
> > What about chaing truncate_inode_pages to take an additional len
> > argument so you don't have to remove all pages past an offset?
>
> That would be what we have been calling "punch", and is quite useful
> for putting holes in files (i.e. making them sparse again). This
> can be used for InterMezzo (among other things) so that the KML log
> file can be growing at the end, but being punched out at the start
> so it doesn't use up a lot of disk space.
It's also very useful for HSM-software (Hirarcial Storage Management).
--
Ragnar Kjørstad
Big Storage
next prev parent reply other threads:[~2002-10-31 20:17 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-10-31 16:03 [PATCH]: reiser4 [5/8] export remove_from_page_cache() Nikita Danilov
2002-10-31 16:18 ` Christoph Hellwig
2002-10-31 16:24 ` Nikita Danilov
2002-10-31 16:31 ` Christoph Hellwig
2002-10-31 16:45 ` Nikita Danilov
2002-10-31 16:58 ` Christoph Hellwig
2002-10-31 17:04 ` Nikita Danilov
2002-10-31 17:12 ` Christoph Hellwig
2002-10-31 17:33 ` Andreas Dilger
2002-10-31 18:25 ` Nikita Danilov
2002-10-31 20:17 ` Ragnar Kjørstad [this message]
2002-10-31 18:57 ` Linus Torvalds
2002-11-01 21:56 ` Andreas Dilger
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