From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bjorn Helgaas Subject: Re: [Bug #15124] PCI host bridge windows ignored (works =?iso-8859-1?q?with=09pci=3Duse=5Fcrs?=) Date: Thu, 28 Jan 2010 09:09:44 -0700 Message-ID: <201001280909.46043.bjorn.helgaas@hp.com> References: <1264652762.24020.5.camel@dc7800.home> <4B61266F.1060600@kernel.org> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <4B61266F.1060600@kernel.org> Content-Disposition: inline Sender: linux-pci-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="us-ascii" To: Yinghai Lu Cc: Linus Torvalds , Jesse Barnes , Jeff Garrett , "Rafael J. Wysocki" , Linux Kernel Mailing List , Kernel Testers List , Linux PCI , Myron Stowe , Matthew Garrett , Ingo Molnar On Wednesday 27 January 2010 10:53:51 pm Yinghai Lu wrote: > On 01/27/2010 08:26 PM, Bjorn Helgaas wrote: > > On Wed, 2010-01-27 at 15:34 -0800, Yinghai Lu wrote: > >> 2. how about when apci is disabled? > > > > When ACPI is disabled, I think we just have to accept that we lose some > > functionality. I don't see the need for alternate ways to accomplish > > everything that ACPI does. It's becoming less and less useful to > > disable ACPI; I think it's only interesting as a debugging tool, and > > even then it's a sledgehammer. > > some systems when acpi is enabled could have interrupt storm. > and have to disable acpi. We should fix that problem rather than just covering it up by disabling ACPI. Can you provide any details? I think it's crazy to add code to work around Problem B that only occurs because we disabled ACPI to work around Problem A. We should just fix Problem A instead. Bjorn