linux-kernel - Re: [PATCH 8/8] x86/mm: Allow to have userspace mappings above 47-bits

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Message-ID: <20170407162044.ntn4w6ukpxhi2ei2@node.shutemov.name>
Date:   Fri, 7 Apr 2017 19:20:44 +0300
From:   "Kirill A. Shutemov" <kirill@...temov.name>
To:     hpa@...or.com
Cc:     Anshuman Khandual <khandual@...ux.vnet.ibm.com>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>, x86@...nel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Dave Hansen <dave.hansen@...el.com>,
        Andy Lutomirski <luto@...capital.net>,
        linux-arch@...r.kernel.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org,
        Dmitry Safonov <dsafonov@...tuozzo.com>
Subject: Re: [PATCH 8/8] x86/mm: Allow to have userspace mappings above
 47-bits

On Fri, Apr 07, 2017 at 09:09:27AM -0700, hpa@...or.com wrote:
> >I think the reasonable way for an application to claim it's 63-bit
> >clean
> >is to make allocations with (void *)-1 as hint address.
> 
> You realize that people have said that about just about every memory

Any better solution?

-- 
 Kirill A. Shutemov