Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757740AbZCUMcT (ORCPT ); Sat, 21 Mar 2009 08:32:19 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752914AbZCUMcB (ORCPT ); Sat, 21 Mar 2009 08:32:01 -0400 Received: from ti-out-0910.google.com ([209.85.142.189]:38574 "EHLO ti-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752543AbZCUMcA (ORCPT ); Sat, 21 Mar 2009 08:32:00 -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=tCwGLMKnEQDoPlE/YB6ZVhKcWXv4mDPqwS9ezb4wvZU00s9jHwyqIU9PIjHgocRwHi zxbbLQE9oK1G20yhEzCusZCl2GBaaCaBkVFq64i1H/g5zCvhoxliJtCtQTToKjcHfQYj +HijQJs5PMICXSQELjPeN2kpNSoNB+IuGDqAw= Message-ID: <49C4DE2C.8010808@vflare.org> Date: Sat, 21 Mar 2009 18:01:40 +0530 From: Nitin Gupta User-Agent: Thunderbird 2.0.0.21 (Windows/20090302) MIME-Version: 1.0 To: Andrew Morton CC: Pekka Enberg , Christoph Lameter , linux-kernel@vger.kernel.org Subject: Re: [PATCH 3/3] compcache documentation References: <49C3A31D.6070208@vflare.org> <49C3A4B0.3050503@vflare.org> <20090321032636.fdeae224.akpm@linux-foundation.org> In-Reply-To: <20090321032636.fdeae224.akpm@linux-foundation.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 Content-Length: 1446 Lines: 35 Andrew Morton wrote: > On Fri, 20 Mar 2009 19:44:08 +0530 Nitin Gupta wrote: > >> ... >> >> + backing_dev: This is block device to be used as backing store for compcache. >> + It must be a valid swap partition. We move data to this device when we >> + encounter incompressible page or memlimit is reached. TODO: we may also >> + move some pages from compcache to this device in case system is really >> + low on memory. >> + This device is not directly visible to kernel as a swap device >> + (/proc/swaps will only show /dev/ramzswap0 and not this device). >> + Managing this backing device is the job of compcache module. > > hrm, OK, it kinda/sorta/maybe might be a little bit like a "compressed > cache". But if someone comes up with a real compressed cache (ie: > pagecache) then they'll want their name back. > Rename is in progress: compcache->ramzswap :) > Also, the kernel already has a widespread and well-established "backing > device" concept, in include/linux/backing-dev.h. This new feature's > poaching of that identifier is a bit confusing. It would be nice to do a > wholesale rename if possible. secondary_dev? nv_dev? > backing_swap? Thanks, 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/