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

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To: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Subject: Re: KASAN vs. boot-time switching between 4- and 5-level paging
From: "Kirill A. Shutemov" <kirill@xxxxxxxxxxxxx>
Date: Mon, 24 Jul 2017 15:13:31 +0300
Cc: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>, Andy Lutomirski <luto@xxxxxxxxxx>, Dmitry Vyukov <dvyukov@xxxxxxxxxx>, Alexander Potapenko <glider@xxxxxxxxxx>, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, "x86@xxxxxxxxxx" <x86@xxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, Andi Kleen <ak@xxxxxxxxxxxxxxx>, Dave Hansen <dave.hansen@xxxxxxxxx>, linux-arch <linux-arch@xxxxxxxxxxxxxxx>, "linux-mm@xxxxxxxxx" <linux-mm@xxxxxxxxx>, LKML <linux-kernel@xxxxxxxxxxxxxxx>, kasan-dev <kasan-dev@xxxxxxxxxxxxxxxx>
In-reply-to: <e201423e-5f4e-8bd6-144a-2374f7b7bb3f@virtuozzo.com>
References: <CALCETrVpNUq3-zEu1Q1O77N8r4kv4kFdefXp7XEs3Hpf-JPAjg@mail.gmail.com> <d3caf8c4-4575-c1b5-6b0f-95527efaf2f9@virtuozzo.com> <f11d9e07-6b31-1add-7677-6a29d15ab608@virtuozzo.com> <20170711170332.wlaudicepkg35dmm@node.shutemov.name> <e9a395f4-018e-4c8c-2098-170172e438f3@virtuozzo.com> <20170711190554.zxkpjeg2bt65wtir@black.fi.intel.com> <20939b37-efd8-2d32-0040-3682fff927c2@virtuozzo.com> <20170713135228.vhvpe7mqdcqzpslw@node.shutemov.name> <20170713141528.rwuz5n2p57omq6wi@node.shutemov.name> <e201423e-5f4e-8bd6-144a-2374f7b7bb3f@virtuozzo.com>
User-agent: NeoMutt/20170609 (1.8.3)

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?

-- 
 Kirill A. Shutemov

Follow-Ups:
- Re: KASAN vs. boot-time switching between 4- and 5-level paging
  - From: Andrey Ryabinin

References:
- Re: KASAN vs. boot-time switching between 4- and 5-level paging
  - From: Andy Lutomirski
- Re: KASAN vs. boot-time switching between 4- and 5-level paging
  - From: Andrey Ryabinin
- Re: KASAN vs. boot-time switching between 4- and 5-level paging
  - From: Andrey Ryabinin
- Re: KASAN vs. boot-time switching between 4- and 5-level paging
  - From: Kirill A. Shutemov
- Re: KASAN vs. boot-time switching between 4- and 5-level paging
  - From: Andrey Ryabinin
- Re: KASAN vs. boot-time switching between 4- and 5-level paging
  - From: Kirill A. Shutemov
- Re: KASAN vs. boot-time switching between 4- and 5-level paging
  - From: Andrey Ryabinin
- Re: KASAN vs. boot-time switching between 4- and 5-level paging
  - From: Kirill A. Shutemov
- Re: KASAN vs. boot-time switching between 4- and 5-level paging
  - From: Kirill A. Shutemov
- Re: KASAN vs. boot-time switching between 4- and 5-level paging
  - From: Andrey Ryabinin

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