linux-kernel - Re: KASAN vs. boot-time switching between 4- and 5-level paging

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Message-ID: <ba973011-e46c-d034-00ee-77d494c62e5a@virtuozzo.com>
Date:   Mon, 24 Jul 2017 17:07:08 +0300
From:   Andrey Ryabinin <aryabinin@...tuozzo.com>
To:     "Kirill A. Shutemov" <kirill@...temov.name>
Cc:     "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Andy Lutomirski <luto@...nel.org>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Alexander Potapenko <glider@...gle.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "x86@...nel.org" <x86@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, Andi Kleen <ak@...ux.intel.com>,
        Dave Hansen <dave.hansen@...el.com>,
        linux-arch <linux-arch@...r.kernel.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        LKML <linux-kernel@...r.kernel.org>,
        kasan-dev <kasan-dev@...glegroups.com>
Subject: Re: KASAN vs. boot-time switching between 4- and 5-level paging



On 07/24/2017 03:13 PM, Kirill A. Shutemov wrote:
> On Thu, Jul 13, 2017 at 05:19:22PM +0300, Andrey Ryabinin wrote:
>>>> https://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git/commit/?h=la57/boot-switching/v2&id=13327fec85ffe95d9c8a3f57ba174bf5d5c1fb01
>>>>
>>>>> As for KASAN, I think it would be better just to make it work faster,
>>>>> the patch below demonstrates the idea.
>>>>
>>>> Okay, let me test this.
>>>
>>> The patch works for me.
>>>
>>> The problem is not exclusive to 5-level paging, so could you prepare and
>>> push proper patch upstream?
>>>
>>
>> Sure, will do
> 
> Andrey, any follow up on this?
> 

Sorry, I've been busy a bit. Will send patch shortly