linux-kernel - Re: [PATCH v2] arm64: spectre: increase parameters that can be used to turn off bhb mitigation individually

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Message-Id: <166274687150.1011948.15499044427739964990.b4-ty@arm.com>
Date:   Fri,  9 Sep 2022 19:08:01 +0100
From:   Catalin Marinas <catalin.marinas@....com>
To:     james.morse@....com, will@...nel.org,
        Liu Song <liusong@...ux.alibaba.com>
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2] arm64: spectre: increase parameters that can be used to turn off bhb mitigation individually

On Fri, 26 Aug 2022 19:40:50 +0800, Liu Song wrote:
> From: Liu Song <liusong@...ux.alibaba.com>
> 
> In our environment, it was found that the mitigation BHB has a great
> impact on the benchmark performance. For example, in the lmbench test,
> the "process fork && exit" test performance drops by 20%.
> So it is necessary to have the ability to turn off the mitigation
> individually through cmdline, thus avoiding having to compile the
> kernel by adjusting the config.
> 
> [...]

Applied to arm64 (for-next/misc), thanks!

[1/1] arm64: spectre: increase parameters that can be used to turn off bhb mitigation individually
      https://git.kernel.org/arm64/c/877ace9eab7d

-- 
Catalin