Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756867AbXEYFKy (ORCPT ); Fri, 25 May 2007 01:10:54 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751979AbXEYFKr (ORCPT ); Fri, 25 May 2007 01:10:47 -0400 Received: from an-out-0708.google.com ([209.85.132.248]:50087 "EHLO an-out-0708.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751929AbXEYFKq (ORCPT ); Fri, 25 May 2007 01:10:46 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=IWbSD1pXKz7uTeO6S1YOyMLk4FL5ySJuS8EVLLSzm1J5+j8t5PyBpyjnqfPNTE76JVa+HIUNXmCCbO+4+QNZzsDg3wX9INe+Q/AOytbg8bSNjGoshlefXTUwB9QRWHCE3oEgDkk2ZU0+ZsOcbxhyy/s/hwniSeE9XOjR32bz8qM= Message-ID: <4cefeab80705242210k1169d85k97ce803de02dbc2a@mail.gmail.com> Date: Fri, 25 May 2007 10:40:41 +0530 From: "Nitin Gupta" To: "Bret Towe" Subject: Re: [RFC] LZO de/compression support - take 3 Cc: linux-kernel@vger.kernel.org, "Richard Purdie" , linux-mm-cc@laptop.org, "Satyam Sharma" In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <4cefeab80705230127r58e8f9e1sa644092e95eb81eb@mail.gmail.com> <4cefeab80705240648k2f3c22ddw13374c9d6b2f521a@mail.gmail.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2160 Lines: 60 On 5/25/07, Bret Towe wrote: > On 5/24/07, Nitin Gupta wrote: > > On 5/23/07, Bret Towe wrote: > > > On 5/23/07, Nitin Gupta wrote: > > > > > > For now, tested on x86 only. > > > > > > If you have a program to test this I can run it on an amd64 and a g4 ppc > > > > > > > Attached is the kernel module (compress-test) to test this LZO code. > > Just compile this module against 2.6.22-rc2 with this LZO patch. Then > > testing can be done as: > > 1- Mount DebugFS somewhere e.g: > > mkdir /debug; mount -t debugfs debugfs /debug > > 2- Load the module and do: > > cat /path/to/some_file > /debug/compress_test/compress > > (/var/log/messages should show that compression was successful) > > 3- Then decompress this file as: > > cat /debug/compress_test/decompress > /tmp/t > > (/var/log/messages should show that decompression was successful) > > 4- For extra verification do: > > diff /tmp/t /path/to/some_file -- O/P must be empty > > > > > > the test worked fine on amd64 > from dmesg: > LZO compress successful: orig_size=17448, comp_size=8183 > LZO decompress successful: decomp_size=17448 > > and input and output files I gave it: > sha1sum test-input output > 2221c586e3eb869af7f4333d4f56b441b9aa8414 test-input > 2221c586e3eb869af7f4333d4f56b441b9aa8414 output > Good to know it worked correctly on 64-bit system too. I will also add exporting benchmarking figures soon. > (will be giving the ppc box the same file to test btw when I get to it) > > and I don't know if it matters much but I tried feeding it a 260k file > and it didn't like it > > cat /usr/bin/yelp > /debug/compress_test/compress > cat: write error: No space left on device > Ah! I forgot to mention that max file size to feed is 256K (this was just for simplicity of compress-test module implementation). Thanks for your testing. - Nitin - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/