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

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Date:	Mon, 15 Oct 2012 14:19:14 -0500
From:	Seth Jennings <sjenning@...ux.vnet.ibm.com>
To:	"Markus F.X.J. Oberhumer" <markus@...rhumer.com>
CC:	Robert Jennings <rcj@...ux.vnet.ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Andi Kleen <andi@...stfloor.org>,
	Johannes Stezenbach <js@...21.net>,
	Richard Weinberger <richard.weinberger@...il.com>
Subject: Re: [PATCH 0/3] Update LZO compression

> 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

As this relates to my work on zcache, I just tested these patches on PPC64 and
they cause the LZO crypto module to fail its self-test:

[    0.521137] alg: comp: Compression test 1 failed for lzo-generic: output len = 62

I built the exact same kernel for x86_64 and all is fine.  I suspect an endianness
related bug, but I haven't looked at the code that closely yet.

Any ideas?  I'd be happy to test any potential fixes.

Seth

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