Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1764281AbXEYRCc (ORCPT ); Fri, 25 May 2007 13:02:32 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1761386AbXEYRCZ (ORCPT ); Fri, 25 May 2007 13:02:25 -0400 Received: from an-out-0708.google.com ([209.85.132.246]:45386 "EHLO an-out-0708.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752668AbXEYRCY (ORCPT ); Fri, 25 May 2007 13:02:24 -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=gi/b/tvvOcNthXjvCor8uP+/s94nvMUqktdstnUurUlzPcJ6DhWc+OhVKoY558WIgQqcwJj/1d1SmnTJXjv9yIPNkhZbYLqB6pKDaD96SLMVa8XpAUp0aoEBqZ4mz1OgDgf162G+6LA5dFPUVaJSbghHiU7LMYChd9ABgFPzsyo= Message-ID: Date: Fri, 25 May 2007 10:02:13 -0700 From: "Bret Towe" To: "Nitin Gupta" 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: <4cefeab80705242210k1169d85k97ce803de02dbc2a@mail.gmail.com> 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> <4cefeab80705242210k1169d85k97ce803de02dbc2a@mail.gmail.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2658 Lines: 75 On 5/24/07, Nitin Gupta wrote: > 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) [ 237.556167] LZO compress successful: orig_size=17448, comp_size=8183 [ 253.320760] LZO decompress successful: decomp_size=17448 2221c586e3eb869af7f4333d4f56b441b9aa8414 test-input 2e6c96b687274b629308b29835cebd3af989e0c7 output ppc however seems bust the computer is a g4 mini > > 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). figured it might be something like that > Thanks for your testing. no problem > - 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/