From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752934Ab0EHAu6 (ORCPT ); Fri, 7 May 2010 20:50:58 -0400 Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.122]:59976 "EHLO cdptpa-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750956Ab0EHAu5 (ORCPT ); Fri, 7 May 2010 20:50:57 -0400 X-Authority-Analysis: v=1.1 cv=NIOYnwefqCV/MKW0EFJDPpcpEuWwVTNQGA0aDJzefgU= c=1 sm=0 a=jbQAF9jGaHUA:10 a=IkcTkHD0fZMA:10 a=Ojb4KS2nAQbJgCTPCAnicg==:17 a=eNNjnCXZqFQuOcZJndQA:9 a=O8RnmSKagjWgZsE2I7l_Jx1As0UA:4 a=QEXdDO2ut3YA:10 a=Ojb4KS2nAQbJgCTPCAnicg==:117 X-Cloudmark-Score: 0 X-Originating-IP: 70.121.210.183 Subject: Re: unified page and buffer cache? From: Phillip Susi To: Matthew Wilcox Cc: linux-fsdevel@vger.kernel.org, Linux-kernel In-Reply-To: <20100507183000.GD17259@parisc-linux.org> References: <4BCC7C05.8000803@cfl.rr.com> <4BE417CB.7000806@cfl.rr.com> <20100507135329.GA17259@parisc-linux.org> <4BE4359E.9020400@cfl.rr.com> <20100507183000.GD17259@parisc-linux.org> Content-Type: text/plain; charset="UTF-8" Date: Fri, 07 May 2010 20:50:53 -0400 Message-ID: <1273279853.2444.3.camel@faldara> Mime-Version: 1.0 X-Mailer: Evolution 2.28.3 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2010-05-07 at 12:30 -0600, Matthew Wilcox wrote: > That would be possible, but would waste memory space. But we've all > got gigabytes of ram these days, maybe nobody cares. Why would it waste memory space? Either way it's in some memory mapping somewhere. It's just a matter of what file it is associated with? The inode of the directory, or the underlying block device?