From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lf0-f70.google.com (mail-lf0-f70.google.com [209.85.215.70]) by kanga.kvack.org (Postfix) with ESMTP id 2697B6B0009 for ; Sun, 11 Feb 2018 06:02:38 -0500 (EST) Received: by mail-lf0-f70.google.com with SMTP id r13so3511963lff.22 for ; Sun, 11 Feb 2018 03:02:38 -0800 (PST) Received: from tartarus.angband.pl ([2a03:9300:10::8]) by mx.google.com with ESMTPS id v2si2159927ljv.320.2018.02.11.03.02.36 for (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Sun, 11 Feb 2018 03:02:36 -0800 (PST) Date: Sun, 11 Feb 2018 11:59:09 +0100 From: Adam Borowski Subject: Re: [PATCH 00/31 v2] PTI support for x86_32 Message-ID: <20180211105909.53bv5q363u7jgrsc@angband.pl> References: <1518168340-9392-1-git-send-email-joro@8bytes.org> <20180209191112.55zyjf4njum75brd@suse.de> <20180210091543.ynypx4y3koz44g7y@angband.pl> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: Sender: owner-linux-mm@kvack.org List-ID: To: Linus Torvalds Cc: Joerg Roedel , Andy Lutomirski , Joerg Roedel , Thomas Gleixner , Ingo Molnar , "H . Peter Anvin" , X86 ML , LKML , Linux-MM , Dave Hansen , Josh Poimboeuf , Juergen Gross , Peter Zijlstra , Borislav Petkov , Jiri Kosina , Boris Ostrovsky , Brian Gerst , David Laight , Denys Vlasenko , Eduardo Valentin , Greg KH , Will Deacon , "Liguori, Anthony" , Daniel Gruss , Hugh Dickins , Kees Cook , Andrea Arcangeli , Waiman Long , Pavel Machek On Sat, Feb 10, 2018 at 12:22:59PM -0800, Linus Torvalds wrote: > On Sat, Feb 10, 2018 at 1:15 AM, Adam Borowski wrote: > > > > Alas, we got some data: > > https://popcon.debian.org/ says 20% of x86 users have i386 as their main ABI > > (current; people with popcon installed). > > One of the issues I've seen is that people often simply move a disk > (or copy an installation) when upgrading machines. Less skilled users (ie, most of them) had until recently a different hurdle: the "32-bit" option was shown way too prominently, without an explanation. > Does Debian make it easy to upgrade to a 64-bit kernel if you have a > 32-bit install? Quite easy, yeah. Crossgrading userspace is not for the faint of the heart, but changing just the kernel is fine. > Because if not, then it's entirely possible that a lot > of people started out with a 32-bit install (maybe they even had a > 64-bit kernel, but they started when the 32-bit install was the > default one), and never upgraded their kernel. > > It really should be easy to _just_ upgrade the kernel. But if the > distro doesn't support it, most people won't do it. I just realized that, for people who use distro kernels, the right way is a message during upgrade. Ie, it's up to the packagers rather than you. Having a dire-sounding printk, though, would still be nice. Meow! -- ac?aGBP'a 3/4 a >>ac?aGBP|a ? aGBP 3/4 a ?ac?a ?a ?aGBP?a!? Vat kind uf sufficiently advanced technology iz dis!? ac?a!?a ?a .a ?a ?a ? -- Genghis Ht'rok'din a ?a 3aGBP?a ?a ?a ?a ? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org