From mboxrd@z Thu Jan 1 00:00:00 1970 From: "H. Peter Anvin" Subject: Re: [RFT] x86 acpi: normalize segment descriptor register on resume Date: Tue, 01 Jul 2008 10:28:48 -0700 Message-ID: <486A6950.6050507@zytor.com> References: <200807010148.02135.rjw@sisk.pl> <20080701063133.GC16642@elte.hu> <4869D67B.4060902@zytor.com> <486A2AC3.2060107@firstfloor.org> <486A5378.7020601@zytor.com> <486A5977.8020905@firstfloor.org> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <486A5977.8020905@firstfloor.org> Sender: linux-acpi-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: Andi Kleen Cc: Ingo Molnar , "Rafael J. Wysocki" , kernel-testers@vger.kernel.org, ACPI Devel Maling List , LKML , pm list , Pavel Machek Andi Kleen wrote: > H. Peter Anvin wrote: >> Andi Kleen wrote: >>>> It still seems incredibly risky to push this for 2.6.26, especially >>>> given the Elan revelation. >>> Do Elans even support S3? >> I don't know if they do, but I don't know offhand the extent of machines >> that may have that problem, especially since Intel now document it as >> "failures are readily seen". > > What document is that exactly? > Per Jeremy's recent email, volume 3a, section 8.9.1: > Random failures can occur if other instructions exist between steps > 3 and 4 above. Failures will be readily seen in some situations, > such as when instructions that reference memory are inserted between > steps 3 and 4 while in system management mode. -hpa