From owner-svn-src-head@FreeBSD.ORG Fri Oct 9 16:08:13 2009 Return-Path: Delivered-To: svn-src-head@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 62D0A10656A6; Fri, 9 Oct 2009 16:08:13 +0000 (UTC) (envelope-from jhb@freebsd.org) Received: from cyrus.watson.org (cyrus.watson.org [65.122.17.42]) by mx1.freebsd.org (Postfix) with ESMTP id 33CEE8FC30; Fri, 9 Oct 2009 16:08:13 +0000 (UTC) Received: from bigwig.baldwin.cx (66.111.2.69.static.nyinternet.net [66.111.2.69]) by cyrus.watson.org (Postfix) with ESMTPSA id D3B9546B1A; Fri, 9 Oct 2009 12:08:12 -0400 (EDT) Received: from jhbbsd.hudson-trading.com (unknown [209.249.190.8]) by bigwig.baldwin.cx (Postfix) with ESMTPA id 080628A025; Fri, 9 Oct 2009 12:08:12 -0400 (EDT) From: John Baldwin To: Alan Cox Date: Fri, 9 Oct 2009 10:29:03 -0400 User-Agent: KMail/1.9.7 References: <200910041853.n94IrAf7082338@svn.freebsd.org> <4ACA0F09.2010808@FreeBSD.org> <4ACAF96C.6070204@cs.rice.edu> In-Reply-To: <4ACAF96C.6070204@cs.rice.edu> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200910091029.04442.jhb@freebsd.org> X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.0.1 (bigwig.baldwin.cx); Fri, 09 Oct 2009 12:08:12 -0400 (EDT) X-Virus-Scanned: clamav-milter 0.95.1 at bigwig.baldwin.cx X-Virus-Status: Clean X-Spam-Status: No, score=-2.5 required=4.2 tests=BAYES_00,RDNS_NONE autolearn=no version=3.2.5 X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on bigwig.baldwin.cx Cc: Alan Cox , svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org Subject: Re: svn commit: r197750 - head/sys/vm X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 09 Oct 2009 16:08:13 -0000 On Tuesday 06 October 2009 4:01:48 am Alan Cox wrote: > John Baldwin wrote: > > > > Do you care what is in the padding in this case or more about just > > having each mutex on a separate cache line? __aligned() is fine if > > you don't mind the padding getting reused for something else. > > > > Yes, I care. I would also like to prevent the placement of the heads of > the active, inactive, and hold queues (vm_page_queues[]) in the same > cache line as the free page queue mutex. Hmm, ok. -- John Baldwin