Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Date:   Mon, 17 Dec 2018 12:38:47 -0800
From:   Andrew Morton <akpm@linux-foundation.org>
To:     Andrey Konovalov <andreyknvl@google.com>
Cc:     Vincenzo Frascino <vincenzo.frascino@arm.com>,
        Andrey Ryabinin <aryabinin@virtuozzo.com>,
        Alexander Potapenko <glider@google.com>,
        Dmitry Vyukov <dvyukov@google.com>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will.deacon@arm.com>,
        Christoph Lameter <cl@linux.com>,
        Mark Rutland <mark.rutland@arm.com>,
        Nick Desaulniers <ndesaulniers@google.com>,
        Marc Zyngier <marc.zyngier@arm.com>,
        Dave Martin <dave.martin@arm.com>,
        Ard Biesheuvel <ard.biesheuvel@linaro.org>,
        "Eric W . Biederman" <ebiederm@xmission.com>,
        Ingo Molnar <mingo@kernel.org>,
        Paul Lawrence <paullawrence@google.com>,
        Geert Uytterhoeven <geert@linux-m68k.org>,
        Arnd Bergmann <arnd@arndb.de>,
        "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Kate Stewart <kstewart@linuxfoundation.org>,
        Mike Rapoport <rppt@linux.vnet.ibm.com>,
        kasan-dev <kasan-dev@googlegroups.com>,
        "open list:DOCUMENTATION" <linux-doc@vger.kernel.org>,
        LKML <linux-kernel@vger.kernel.org>,
        Linux ARM <linux-arm-kernel@lists.infradead.org>,
        linux-sparse@vger.kernel.org,
        Linux Memory Management List <linux-mm@kvack.org>,
        Linux Kbuild mailing list <linux-kbuild@vger.kernel.org>,
        Vishwath Mohan <vishwath@google.com>,
        Chintan Pandya <cpandya@codeaurora.org>,
        Jacob Bramley <Jacob.Bramley@arm.com>,
        Jann Horn <jannh@google.com>,
        Ruben Ayrapetyan <Ruben.Ayrapetyan@arm.com>,
        Lee Smith <Lee.Smith@arm.com>,
        Kostya Serebryany <kcc@google.com>,
        Mark Brand <markbrand@google.com>,
        Ramana Radhakrishnan <Ramana.Radhakrishnan@arm.com>,
        Evgenii Stepanov <eugenis@google.com>
Subject: Re: [PATCH v13 19/25] kasan: add hooks implementation for tag-based
 mode
Message-Id: <20181217123847.492b9ae4934bd0d95b0bbbdc@linux-foundation.org>
In-Reply-To: <CAAeHK+w2jppKbb26bBk6uP9ydZeHrtNc6b2CVv4xbvt6ecVooA@mail.gmail.com>
References: <cover.1544099024.git.andreyknvl@google.com>
        <bda78069e3b8422039794050ddcb2d53d053ed41.1544099024.git.andreyknvl@google.com>
        <2bf7415e-2724-b3c3-9571-20c8b6d43b92@arm.com>
        <CAAeHK+xc6R_p26-tu--9W1L1PvUAFb70J23ByiEukKz3uVC3EQ@mail.gmail.com>
        <b99b331d-22ca-b9db-8677-4896c427ef10@arm.com>
        <CAAeHK+w2jppKbb26bBk6uP9ydZeHrtNc6b2CVv4xbvt6ecVooA@mail.gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On Mon, 17 Dec 2018 20:33:42 +0100 Andrey Konovalov <andreyknvl@google.com> wrote:

> > Curiosity, did you try your patches with SLUB red zoning enabled?
> > Since the area used for the Redzone is just after the payload, aligning the
> > object_size independently from the allocator could have side effects, at least
> > if I understand well how the mechanism works.
> >
> > Setting ARCH_SLAB_MINALIGN should avoid this as well.
> >
> > What do you think?
> 
> Sounds good to me.
> 
> Andrew, how should proceed with this? Send another fixup patch or
> resend the whole series?

It depends on how extensive the changes are.  I prefer a fixup, but at
some point it's time to drop it all and start again.