linux-kernel - Re: [PATCH v12 08/11] arm64/kasan: add and use kasan_map

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Message-ID: <20171018170651.GG21820@arm.com>
Date:   Wed, 18 Oct 2017 18:06:51 +0100
From:   Will Deacon <will.deacon@....com>
To:     Pavel Tatashin <pasha.tatashin@...cle.com>
Cc:     Andrey Ryabinin <aryabinin@...tuozzo.com>,
        linux-kernel@...r.kernel.org, sparclinux@...r.kernel.org,
        linux-mm@...ck.org, linuxppc-dev@...ts.ozlabs.org,
        linux-s390@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        x86@...nel.org, kasan-dev@...glegroups.com, borntraeger@...ibm.com,
        heiko.carstens@...ibm.com, davem@...emloft.net,
        willy@...radead.org, mhocko@...nel.org, ard.biesheuvel@...aro.org,
        mark.rutland@....com, catalin.marinas@....com, sam@...nborg.org,
        mgorman@...hsingularity.net, akpm@...ux-foundation.org,
        steven.sistare@...cle.com, daniel.m.jordan@...cle.com,
        bob.picco@...cle.com
Subject: Re: [PATCH v12 08/11] arm64/kasan: add and use kasan_map_populate()

On Wed, Oct 18, 2017 at 01:03:10PM -0400, Pavel Tatashin wrote:
> I asked Will, about it, and he preferred to have this patched added to the
> end of my series instead of replacing "arm64/kasan: add and use
> kasan_map_populate()".

As I said, I'm fine either way, I just didn't want to cause extra work
or rebasing:

http://lists.infradead.org/pipermail/linux-arm-kernel/2017-October/535703.html

> In addition, Will's patch stops using large pages for kasan memory, and thus
> might add some regression in which case it is easier to revert just that
> patch instead of the whole series. It is unlikely that regression is going
> to be detectable, because kasan by itself makes system quiet slow already.

If it causes problems, I'll just fix them. No need to revert.

Will