linux-kernel - Re: [PATCH v2 1/2] arm64: kasan: do not instrument stacktrace.c

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Message-Id: <165599625020.2988777.9370908523559678089.b4-ty@kernel.org>
Date:   Thu, 23 Jun 2022 20:31:32 +0100
From:   Will Deacon <will@...nel.org>
To:     andrey.konovalov@...ux.dev,
        Catalin Marinas <catalin.marinas@....com>
Cc:     kernel-team@...roid.com, Will Deacon <will@...nel.org>,
        Alexander Potapenko <glider@...gle.com>,
        Mark Rutland <mark.rutland@....com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        linux-arm-kernel@...ts.infradead.org,
        Vincenzo Frascino <vincenzo.frascino@....com>,
        Andrey Konovalov <andreyknvl@...il.com>,
        kasan-dev@...glegroups.com,
        Andrey Konovalov <andreyknvl@...gle.com>,
        Marco Elver <elver@...gle.com>,
        Andrey Ryabinin <ryabinin.a.a@...il.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/2] arm64: kasan: do not instrument stacktrace.c

On Mon, 23 May 2022 16:51:51 +0200, andrey.konovalov@...ux.dev wrote:
> From: Andrey Konovalov <andreyknvl@...gle.com>
> 
> Disable KASAN instrumentation of arch/arm64/kernel/stacktrace.c.
> 
> This speeds up Generic KASAN by 5-20%.
> 
> As a side-effect, KASAN is now unable to detect bugs in the stack trace
> collection code. This is taken as an acceptable downside.
> 
> [...]

Applied to arm64 (for-next/stacktrace), thanks! I had to fix conflicts
in both of the patches, so please can you take a quick look at the result?

[1/2] arm64: kasan: do not instrument stacktrace.c
      https://git.kernel.org/arm64/c/802b91118d11
[2/2] arm64: stacktrace: use non-atomic __set_bit
      https://git.kernel.org/arm64/c/446297b28a21

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev