From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761106AbYEPTCT (ORCPT ); Fri, 16 May 2008 15:02:19 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752436AbYEPTCL (ORCPT ); Fri, 16 May 2008 15:02:11 -0400 Received: from outbound-mail-34.bluehost.com ([69.89.18.154]:33373 "HELO outbound-mail-34.bluehost.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1754439AbYEPTCK (ORCPT ); Fri, 16 May 2008 15:02:10 -0400 From: Jesse Barnes To: Arnaldo Carvalho de Melo Subject: Re: [PATCH][PCI]: Introduce pci_find_capability_cached and make MSI use it Date: Fri, 16 May 2008 12:01:48 -0700 User-Agent: KMail/1.9.9 Cc: Matthew Wilcox , linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-rt-users@vger.kernel.org References: <20080515160426.GD14846@ghostprotocols.net> <200805161044.34938.jbarnes@virtuousgeek.org> <20080516183356.GA7307@ghostprotocols.net> In-Reply-To: <20080516183356.GA7307@ghostprotocols.net> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200805161201.48644.jbarnes@virtuousgeek.org> X-Identified-User: {642:box128.bluehost.com:virtuous:virtuousgeek.org} {sentby:smtp auth 75.111.27.49 authed with jbarnes@virtuousgeek.org} DomainKey-Status: no signature Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Friday, May 16, 2008 11:33 am Arnaldo Carvalho de Melo wrote: > > There are a few other common cap checks, but I don't think they compare > > to MSI in terms of latency sensitivity (though I didn't audit all the > > CAP_ID_EXP checks, there are quite a few of those). > > > > Since we know MSI is a problem, let's just go with fixing that for now. > > If we find that other caps are also causing problems we can revisit > > caching all of them; the patch is simple enough. > > Do you want me to submit another patch or can you cook up one? I can hack it up, probably not until Monday though (I'll be out of town this weekend). Jesse