Messages in this thread | | | Date | Wed, 7 Sep 2022 17:29:53 +0100 | From | Will Deacon <> | Subject | Re: [PATCH v2] arm64: spectre: increase parameters that can be used to turn off bhb mitigation individually |
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On Wed, Sep 07, 2022 at 03:29:05PM +0100, Catalin Marinas wrote: > On Fri, Aug 26, 2022 at 07:40:50PM +0800, Liu Song wrote: > > From: Liu Song <liusong@linux.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. > > > > Signed-off-by: Liu Song <liusong@linux.alibaba.com> > > If people want to disable this mitigation and know what they are doing, > I have no objection: > > Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Thanks!
> (I guess that's more like 6.1 material)
Yup, agreed. I take it you'll pick it up, then?
Will
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