Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758018AbZAGNZV (ORCPT ); Wed, 7 Jan 2009 08:25:21 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757121AbZAGNYu (ORCPT ); Wed, 7 Jan 2009 08:24:50 -0500 Received: from palinux.external.hp.com ([192.25.206.14]:40057 "EHLO mail.parisc-linux.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755772AbZAGNYt (ORCPT ); Wed, 7 Jan 2009 08:24:49 -0500 Date: Wed, 7 Jan 2009 06:24:47 -0700 From: Matthew Wilcox To: Ingo Molnar Cc: Chris Mason , Nick Piggin , Peter Zijlstra , Andi Kleen , Andrew Morton , linux-kernel@vger.kernel.org, linux-fsdevel , linux-btrfs , Thomas Gleixner , Steven Rostedt , Gregory Haskins Subject: Re: Btrfs for mainline Message-ID: <20090107132447.GR2002@parisc-linux.org> References: <1230722935.4680.5.camel@think.oraclecorp.com> <1231093310.27690.5.camel@twins> <20090104184103.GE2002@parisc-linux.org> <200901060147.24285.nickpiggin@yahoo.com.au> <1231173015.4290.129.camel@think.oraclecorp.com> <20090107130742.GD3529@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090107130742.GD3529@elte.hu> User-Agent: Mutt/1.5.13 (2006-08-11) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1052 Lines: 26 On Wed, Jan 07, 2009 at 02:07:42PM +0100, Ingo Molnar wrote: > * Chris Mason wrote: > > All of this is a long way of saying the btrfs locking scheme is far from > > perfect. I'll look harder at the loop and ways to get rid of it. > > > > adaptive spinning mutexes perhaps? Such as: Um, I don't know how your mail client does threading, but mine shows Peter's message introducing the adaptive spinning mutexes as a reply to one of Chris' messages in the btrfs thread. Chris is just saying he'll look at other ways to not need the spinning mutexes. -- Matthew Wilcox Intel Open Source Technology Centre "Bill, look, we understand that you're interested in selling us this operating system, but compare it to ours. We can't possibly take such a retrograde step." -- 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/