Re: [PATCH v7 18/43] instrumented.h: add KMSAN support

Marco Elver
2022-10-19T17:59:08Z

On Wed, 19 Oct 2022 at 10:37, youling 257 <youling257@gmail.com> wrote:
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> ---------- Forwarded message ---------
> 发件人： youling257 <youling257@gmail.com>
> Date: 2022年10月20日周四 上午1:36
> Subject: Re: [PATCH v7 18/43] instrumented.h: add KMSAN support
> To: <glider@google.com>
> Cc: <youling257@gmail.com>
>
>
> i using linux kernel 6.1rc1 on android, i use gcc12 build kernel 6.1 for android, CONFIG_KMSAN is not set.
> "instrumented.h: add KMSAN support" cause android bluetooth high CPU usage.
> git bisect linux kernel 6.1rc1, "instrumented.h: add KMSAN support" is a bad commit for my android.
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> this is my kernel 6.1, revert include/linux/instrumented.h fix high cpu usage problem.
> https://github.com/youling257/android-mainline/commits/6.1

What arch?
If x86, can you try to revert only the change to
instrument_get_user()? (I wonder if the u64 conversion is causing
issues.)