From owner-cvs-all@FreeBSD.ORG Tue Apr 29 15:59:20 2003 Return-Path: Delivered-To: cvs-all@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 2DE3537B401; Tue, 29 Apr 2003 15:59:20 -0700 (PDT) Received: from harmony.village.org (rover.bsdimp.com [204.144.255.66]) by mx1.FreeBSD.org (Postfix) with ESMTP id EBD3543FA3; Tue, 29 Apr 2003 15:59:18 -0700 (PDT) (envelope-from imp@bsdimp.com) Received: from localhost (warner@rover2.village.org [10.0.0.1]) by harmony.village.org (8.12.8/8.12.3) with ESMTP id h3TMxDA7093252; Tue, 29 Apr 2003 16:59:13 -0600 (MDT) (envelope-from imp@bsdimp.com) Date: Tue, 29 Apr 2003 16:59:06 -0600 (MDT) Message-Id: <20030429.165906.94349439.imp@bsdimp.com> To: nate@yogotech.com From: "M. Warner Losh" In-Reply-To: <16046.64504.186129.388342@emerger.yogotech.com> References: <16046.55840.945040.149302@grasshopper.cs.duke.edu> <16046.64504.186129.388342@emerger.yogotech.com> X-Mailer: Mew version 2.1 on Emacs 21.2 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit cc: cvs-all@FreeBSD.org cc: cvs-src@FreeBSD.org cc: src-committers@FreeBSD.org cc: gallatin@cs.duke.edu cc: jhb@FreeBSD.org Subject: Re: cvs commit: src/sys/dev/fxp if_fxp.c if_fxpvar.h X-BeenThere: cvs-all@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: CVS commit messages for the entire tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 29 Apr 2003 22:59:20 -0000 In message: <16046.64504.186129.388342@emerger.yogotech.com> Nate Williams writes: : > A mutex is far more expensive than an spl. : : Huh? If so, then something is *really* screwed up, since SPL's block : out lots of things, while mutex's can/should block little things. : : That's how we get greater parrallelism. A mutex is more expensive to take out, but blocks fewer things. splfoo() is a lot faster to execute, but does block a lot of other things. Warner