From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755711Ab0EDXr6 (ORCPT ); Tue, 4 May 2010 19:47:58 -0400 Received: from fg-out-1718.google.com ([72.14.220.153]:3102 "EHLO fg-out-1718.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752189Ab0EDXr4 (ORCPT ); Tue, 4 May 2010 19:47:56 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:content-type:content-transfer-encoding; b=jXFSQ6T/etuKiFBR08qHI5fB9ZsdfZ/wmxiO6dPFfA6cc+oT+iZrSfUN8+EYWr8lYH csfVKonfWTz+c/lzp5kMtbzOJuBh36BcINciEJeTHFH79GJ7YwuBE+wTT5OaCmG3Mwk/ gKLJLWaXxMLZnv6vRLSQkgXH32BJRBarhzKPM= Message-ID: <4BE0B225.2080308@gmail.com> Date: Tue, 04 May 2010 15:47:49 -0800 From: Kent Overstreet User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.10pre) Gecko/20100501 Shredder/3.0.5pre MIME-Version: 1.0 To: Andi Kleen CC: linux-kernel@vger.kernel.org Subject: Re: [PATCH 0/3] Bcache: version 4 References: <20100501001212.GA31135@moria> <87y6g03rf8.fsf@basil.nowhere.org> In-Reply-To: <87y6g03rf8.fsf@basil.nowhere.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 05/04/2010 02:14 AM, Andi Kleen wrote: > I read all of this email now and I still have no clue what exactly > a 'bcache' is and why anyone would want one (and if one needs > a large stick to handle it or not) > > Normally the 0/x series of a patch kit is supposed to contain that > information. > > I know it's probably obvious to you, but it's not to most other readers. > > Consider adding some introduction? Ah, whoops. "Block cache" - it uses one block device to cache another, it's intended for SSDs. It's summarized decently in the documentation patch, which if I'd thought harder would've been the first email... http://thread.gmane.org/gmane.linux.kernel/979977 Second patch also has relevant commentary: http://thread.gmane.org/gmane.linux.kernel/979978 http://thread.gmane.org/gmane.linux.kernel/979979 Currently all the necessary functionality for read only is close to done, I'm now doing stress testing. I'm hoping to have it Stable For Me and read/write done in a week or two, at which point it should be ready for people to start playing with.