linux-kernel - Re: [PATCHv2] x86/mm: set x32 syscall bit in SET

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Message-ID: <20170321193459.GG21564@uranus.lan>
Date:   Tue, 21 Mar 2017 22:34:59 +0300
From:   Cyrill Gorcunov <gorcunov@...il.com>
To:     Andy Lutomirski <luto@...capital.net>
Cc:     Dmitry Safonov <dsafonov@...tuozzo.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Dmitry Safonov <0x7f454c46@...il.com>,
        Adam Borowski <kilobyte@...band.pl>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        Andrei Vagin <avagin@...il.com>, Borislav Petkov <bp@...e.de>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        X86 ML <x86@...nel.org>, "H. Peter Anvin" <hpa@...or.com>,
        Andy Lutomirski <luto@...nel.org>,
        Ingo Molnar <mingo@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCHv2] x86/mm: set x32 syscall bit in SET_PERSONALITY()

On Tue, Mar 21, 2017 at 12:31:51PM -0700, Andy Lutomirski wrote:
...
> > I guess the question comes from that we're releasing CRIU 3.0 with
> > 32-bit C/R and some other cool stuff, but we don't support x32 yet.
> > As we don't want release a thing that we aren't properly testing.
> > So for a while we should error on dumping x32 applications.
> 
> I'm curious: shouldn't x32 CRIU just work?  What goes wrong?

Anything ;) We didn't tried as far as I know but i bet
somthing will be broken for sure.