From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joel Becker Subject: Re: Important for fs devs: rcu-walk merged upstream Date: Mon, 10 Jan 2011 17:08:01 -0800 Message-ID: <20110111010800.GE4879@mail.oracle.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: linux-fsdevel , linux-kernel@vger.kernel.org To: Nick Piggin Return-path: Received: from zeniv.linux.org.uk ([195.92.253.2]:60141 "EHLO ZenIV.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755910Ab1AKBIF (ORCPT ); Mon, 10 Jan 2011 20:08:05 -0500 Content-Disposition: inline In-Reply-To: Sender: linux-fsdevel-owner@vger.kernel.org List-ID: On Sat, Jan 08, 2011 at 01:54:47PM +1100, Nick Piggin wrote: > The rcu-walk stuff can be more tricky for your filesystem > to take advantage of. > > If you supply a .d_revalidate, .permission, or .check_acl, > then path walking is going to be slow and unscalable for > you. Do you mean "as slow and unscalable as it has always been" or "even slower now"? A quick look suggests the former, but I wanted to be sure. Joel -- "But all my words come back to me In shades of mediocrity. Like emptiness in harmony I need someone to comfort me." http://www.jlbec.org/ jlbec@evilplan.org