From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=MAILING_LIST_MULTI,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 76499C5CFE7 for ; Wed, 11 Jul 2018 17:28:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2BFF220C0E for ; Wed, 11 Jul 2018 17:28:38 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2BFF220C0E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388809AbeGKRdz (ORCPT ); Wed, 11 Jul 2018 13:33:55 -0400 Received: from mx2.suse.de ([195.135.220.15]:60852 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726340AbeGKRdz (ORCPT ); Wed, 11 Jul 2018 13:33:55 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 9A2ECADC6; Wed, 11 Jul 2018 17:28:33 +0000 (UTC) Date: Wed, 11 Jul 2018 19:28:30 +0200 (CEST) From: Jiri Kosina To: Linus Torvalds cc: Joerg Roedel , Thomas Gleixner , Ingo Molnar , Peter Anvin , the arch/x86 maintainers , Linux Kernel Mailing List , linux-mm , Andrew Lutomirski , Dave Hansen , Josh Poimboeuf , =?ISO-8859-15?Q?J=FCrgen_Gro=DF?= , Peter Zijlstra , Borislav Petkov , Boris Ostrovsky , Brian Gerst , David Laight , Denys Vlasenko , Eduardo Valentin , Greg Kroah-Hartman , Will Deacon , "Liguori, Anthony" , Daniel Gruss , Hugh Dickins , Kees Cook , Andrea Arcangeli , Waiman Long , Pavel Machek , "David H . Gutteridge" , Joerg Roedel Subject: Re: [PATCH 00/39 v7] PTI support for x86-32 In-Reply-To: Message-ID: References: <1531308586-29340-1-git-send-email-joro@8bytes.org> User-Agent: Alpine 2.21 (LSU 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 11 Jul 2018, Linus Torvalds wrote: > It's the testing that worries me most. Pretty much no developers run > 32-bit any more, and I'd be most worried about the odd interactions that > might be hw-specific. Some crazy EFI mapping setup or the similar odd > case that simply requires a particular configuration or setup. > > But I guess those issues will never be found until we just spring this > all on the unsuspecting public. FWIW we shipped Joerg's 32bit KAISER kernel out to our 32bit users (on old product where we still support it) on Apr 25th already (and some issues have been identified since then because of that). So it (or its port to 3.0, to be more precise :p) already did receive some crowd-testing. -- Jiri Kosina SUSE Labs