linux-kernel - Re: Reiser4 und LZO compression

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 29 Aug 2006 07:48:25 +1000
From:	Nigel Cunningham <ncunningham@...uxmail.org>
To:	Edward Shishkin <edward@...esys.com>
Cc:	Stefan Traby <stefan@...lo-penguin.com>,
	Hans Reiser <reiser@...esys.com>,
	Alexey Dobriyan <adobriyan@...il.com>,
	reiserfs-list@...esys.com, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...l.org>
Subject: Re: Reiser4 und LZO compression

Hi.

On Mon, 2006-08-28 at 22:15 +0400, Edward Shishkin wrote:
> Stefan Traby wrote:
> > On Mon, Aug 28, 2006 at 10:06:46AM -0700, Hans Reiser wrote:
> > 
> > 
> >>Hmm.  LZO is the best compression algorithm for the task as measured by
> >>the objectives of good compression effectiveness while still having very
> >>low CPU usage (the best of those written and GPL'd, there is a slightly
> >>better one which is proprietary and uses more CPU, LZRW if I remember
> >>right.  The gzip code base uses too much CPU, though I think Edward made
> > 
> > 
> > I don't think that LZO beats LZF in both speed and compression ratio.
> > 
> > LZF is also available under GPL (dual-licensed BSD) and was choosen in favor
> > of LZO for the next generation suspend-to-disk code of the Linux kernel.
> > 
> > see: http://www.goof.com/pcg/marc/liblzf.html
> > 
> 
> thanks for the info, we will compare them

For Suspend2, we ended up converting the LZF support to a cryptoapi
plugin. Is there any chance that you could use cryptoapi modules? We
could then have a hope of sharing the support.

Regards,

Nigel

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/