From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <owner-linux-mm@kvack.org>
Received: from mail-pd0-f170.google.com (mail-pd0-f170.google.com [209.85.192.170])
	by kanga.kvack.org (Postfix) with ESMTP id 494386B004D
	for <linux-mm@kvack.org>; Wed, 10 Sep 2014 18:46:59 -0400 (EDT)
Received: by mail-pd0-f170.google.com with SMTP id fp1so4289277pdb.15
        for <linux-mm@kvack.org>; Wed, 10 Sep 2014 15:46:59 -0700 (PDT)
Received: from mga09.intel.com (mga09.intel.com. [134.134.136.24])
        by mx.google.com with ESMTP id ii1si29568991pac.155.2014.09.10.15.46.58
        for <linux-mm@kvack.org>;
        Wed, 10 Sep 2014 15:46:58 -0700 (PDT)
Message-ID: <5410D486.4060200@intel.com>
Date: Wed, 10 Sep 2014 15:45:26 -0700
From: Dave Hansen <dave.hansen@intel.com>
MIME-Version: 1.0
Subject: Re: [RFC/PATCH v2 02/10] x86_64: add KASan support
References: <1404905415-9046-1-git-send-email-a.ryabinin@samsung.com>	<1410359487-31938-1-git-send-email-a.ryabinin@samsung.com>	<1410359487-31938-3-git-send-email-a.ryabinin@samsung.com>	<5410724B.8000803@intel.com> <CAPAsAGzm29VWz8ZvOu+fVGn4Vbj7bQZAnB11M5ZZXRTQTchj0w@mail.gmail.com>
In-Reply-To: <CAPAsAGzm29VWz8ZvOu+fVGn4Vbj7bQZAnB11M5ZZXRTQTchj0w@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
Sender: owner-linux-mm@kvack.org
List-ID: <linux-mm.kvack.org>
To: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Andrey Ryabinin <a.ryabinin@samsung.com>, LKML <linux-kernel@vger.kernel.org>, Dmitry Vyukov <dvyukov@google.com>, Konstantin Serebryany <kcc@google.com>, Dmitry Chernenkov <dmitryc@google.com>, Andrey Konovalov <adech.fo@gmail.com>, Yuri Gribov <tetra2005@gmail.com>, Konstantin Khlebnikov <koct9i@gmail.com>, Sasha Levin <sasha.levin@oracle.com>, Christoph Lameter <cl@linux.com>, Joonsoo Kim <iamjoonsoo.kim@lge.com>, Andrew Morton <akpm@linux-foundation.org>, Andi Kleen <andi@firstfloor.org>, Vegard Nossum <vegard.nossum@gmail.com>, "H. Peter Anvin" <hpa@zytor.com>, x86@kernel.org, "linux-mm@kvack.org" <linux-mm@kvack.org>, Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>

On 09/10/2014 01:30 PM, Andrey Ryabinin wrote:
> Yes, there is a reason for this. For inline instrumentation we need to
> catch access to userspace without any additional check.
> This means that we need shadow of 1 << 61 bytes and we don't have so
> many addresses available.

That sounds reasonable.

--
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: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>