linux-kernel - Re: [PATCH 00/39 v7] PTI support for x86-32

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Date:   Wed, 11 Jul 2018 22:56:18 +0259
From:   Thomas Backlund <tmb@...eia.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Joerg Roedel <joro@...tes.org>
CC:     Jiri Kosina <jikos@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...nel.org>, Peter Anvin <hpa@...or.com>,
        the arch/x86 maintainers <x86@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-mm <linux-mm@...ck.org>,
        Andrew Lutomirski <luto@...nel.org>,
        Dave Hansen <dave.hansen@...el.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Jürgen Groß <jgross@...e.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Borislav Petkov <bp@...en8.de>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Brian Gerst <brgerst@...il.com>,
        David Laight <David.Laight@...lab.com>,
        Denys Vlasenko <dvlasenk@...hat.com>,
        Eduardo Valentin <eduval@...zon.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH 00/39 v7] PTI support for x86-32

Den 2018-07-11 kl. 20:28, skrev Jiri Kosina:
> 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.
> 

And Mageia has had v2 since February 13th patched into 4.14 -longterm, 
then updated to v3 at March 5th, and updated to v4 at March 19th and 
been running that since then (since v5 is rebased on v4.17 we stayed 
with v4)


So, here is another "lets merge it upstream" vote :)


--
Thomas