From mboxrd@z Thu Jan 1 00:00:00 1970 From: jerry.hoemann@hp.com Subject: Re: [PATCH 0/3] Early use of boot service memory Date: Wed, 13 Nov 2013 18:40:43 -0700 Message-ID: <20131114014043.GD25344@anatevka.fc.hp.com> References: <1384222558-38527-1-git-send-email-jerry.hoemann@hp.com> <20131113224503.GB25344@anatevka.fc.hp.com> <52840206.5020006@zytor.com> <20131113235708.GC25344@anatevka.fc.hp.com> <528413DE.1090203@zytor.com> Reply-To: jerry.hoemann@hp.com Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <528413DE.1090203@zytor.com> Sender: linux-doc-owner@vger.kernel.org To: "H. Peter Anvin" Cc: rob@landley.net, tglx@linutronix.de, mingo@redhat.com, x86@kernel.org, matt.fleming@intel.com, yinghai@kernel.org, penberg@kernel.org, akpm@linux-foundation.org, linux-doc@vger.kernel.org, linux-efi@vger.kernel.org, vgoyal@redhat.com, linux-kernel@vger.kernel.org List-Id: linux-efi@vger.kernel.org On Wed, Nov 13, 2013 at 04:05:50PM -0800, H. Peter Anvin wrote: > On 11/13/2013 03:57 PM, jerry.hoemann@hp.com wrote: > > > > I think i can go to a date based black list, that removes the manual > > step. System running firmware before certain date assumes we need > > to do the work around. If firmware is newer than that date, we don't > > use the workaround. Blacklist overrides and allows current behavior > > for new firmware that is subsequently found to be broken and for > > which we can't convenience the manufacturer to fix. > > > > No, we can't, at least not for now. We are continually finding new > platforms with the bug. Does you have a list of systems that require efi_reserve_boot_services? might be useful from a testing standpoint to get access to one. > > > > > I will still point out that as currently used, efi_reserve_boot_services > > is wrong. A work around for firmware bugs on one platform shouldn't be > > breaking platforms that don't have that bug. Its just much less likely > > to cause problems with higher crash kernel allocation. > > > > It is wrong, yes, but it seems like a ubiquitous problem. > > -hpa -- ---------------------------------------------------------------------------- Jerry Hoemann Software Engineer Hewlett-Packard/MODL 3404 E Harmony Rd. MS 57 phone: (970) 898-1022 Ft. Collins, CO 80528 FAX: (970) 898-XXXX email: jerry.hoemann@hp.com ----------------------------------------------------------------------------