linux-kernel - Re: [PATCH v4 00/17] khwasan: kernel hardware assisted address sanitizer

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Message-ID: <CAAeHK+wg35W6D3Cat7w8kqV+9fB6dKmnCUuUrZP_tz5=vKk+0Q@mail.gmail.com>
Date:   Thu, 28 Jun 2018 20:26:39 +0200
From:   Andrey Konovalov <andreyknvl@...gle.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Vishwath Mohan <vishwath@...gle.com>,
        Kostya Serebryany <kcc@...gle.com>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Alexander Potapenko <glider@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Christoph Lameter <cl@...ux.com>,
        Mark Rutland <mark.rutland@....com>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Marc Zyngier <marc.zyngier@....com>,
        Dave Martin <dave.martin@....com>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        "Eric W . Biederman" <ebiederm@...ssion.com>,
        Ingo Molnar <mingo@...nel.org>,
        Paul Lawrence <paullawrence@...gle.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Arnd Bergmann <arnd@...db.de>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Kate Stewart <kstewart@...uxfoundation.org>,
        Mike Rapoport <rppt@...ux.vnet.ibm.com>,
        kasan-dev <kasan-dev@...glegroups.com>,
        linux-doc@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        linux-sparse@...r.kernel.org,
        Linux Memory Management List <linux-mm@...ck.org>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Evgenii Stepanov <eugenis@...gle.com>,
        Lee Smith <Lee.Smith@....com>,
        Ramana Radhakrishnan <Ramana.Radhakrishnan@....com>,
        Jacob Bramley <Jacob.Bramley@....com>,
        Ruben Ayrapetyan <Ruben.Ayrapetyan@....com>,
        Jann Horn <jannh@...gle.com>,
        Mark Brand <markbrand@...gle.com>,
        Chintan Pandya <cpandya@...eaurora.org>
Subject: Re: [PATCH v4 00/17] khwasan: kernel hardware assisted address sanitizer

On Thu, Jun 28, 2018 at 3:11 AM, Andrew Morton
<akpm@...ux-foundation.org> wrote:
> On Wed, 27 Jun 2018 17:59:00 -0700 Vishwath Mohan <vishwath@...gle.com> wrote:
>> Yeah, I can confirm that it's an issue. Like Kostya mentioned, I don't have
>> data on-hand, but anecdotally both ASAN and KASAN have proven problematic
>> to enable for environments that don't tolerate the increased memory
>> pressure well. This includes,
>> (a) Low-memory form factors - Wear, TV, Things, lower-tier phones like Go
>> (c) Connected components like Pixel's visual core
>> <https://www.blog.google/products/pixel/pixel-visual-core-image-processing-and-machine-learning-pixel-2/>
>>
>>
>> These are both places I'd love to have a low(er) memory footprint option at
>> my disposal.
>
> Thanks.
>
> It really is important that such information be captured in the
> changelogs.  In as much detail as can be mustered.

I'll add it to the changelog in v5. Thanks!