linux-kernel - Re: [PATCH 0/3] Update LZO compression

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Message-Id: <20121009122614.569b9535.akpm@linux-foundation.org>
Date:	Tue, 9 Oct 2012 12:26:14 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	"Markus F.X.J. Oberhumer" <markus@...rhumer.com>
Cc:	linux-kernel@...r.kernel.org, Andi Kleen <andi@...stfloor.org>,
	Johannes Stezenbach <js@...21.net>,
	richard -rw- weinberger <richard.weinberger@...il.com>,
	linux-btrfs@...r.kernel.org, linux-crypto@...r.kernel.org,
	Artem Bityutskiy <dedekind1@...il.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	David Woodhouse <dwmw2@...radead.org>,
	Phillip Lougher <phillip@...ashfs.org.uk>,
	Dan Magenheimer <dan.magenheimer@...cle.com>,
	Dan Carpenter <dan.carpenter@...cle.com>,
	Stephen Rothwell <sfr@...b.auug.org.au>
Subject: Re: [PATCH 0/3] Update LZO compression

On Sun, 7 Oct 2012 17:07:55 +0200
"Markus F.X.J. Oberhumer" <markus@...rhumer.com> wrote:

> As requested by akpm I am sending my "lzo-update" branch at
> 
>   git://github.com/markus-oberhumer/linux.git lzo-update
> 
> to lkml as a patch series created by "git format-patch -M v3.5..lzo-update".
> 
> You can also browse the branch at
> 
>   https://github.com/markus-oberhumer/linux/compare/lzo-update
> 
> and review the three patches at
> 
>   https://github.com/markus-oberhumer/linux/commit/7c979cebc0f93dc692b734c12665a6824d219c20
>   https://github.com/markus-oberhumer/linux/commit/10f6781c8591fe5fe4c8c733131915e5ae057826
>   https://github.com/markus-oberhumer/linux/commit/5f702781f158cb59075cfa97e5c21f52275057f1

The changes look OK to me.  Please ask Stephen to include the tree in
linux-next, for a 3.7 merge.



The changelog for patch 2/3 says:

: This commit updates the kernel LZO code to the current upsteam version
: which features a significant speed improvement - benchmarking the Calgary
: and Silesia test corpora typically shows a doubled performance in
: both compression and decompression on modern i386/x86_64/powerpc machines.


There are significant clients of the LZO library - crypto, btrfs,
jffs2, ubifs, squashfs and zcache.  So let's give all those people a cc
and ask that they test the LZO changes once they land in linux-next. 
For correctness and performance, please.


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