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From:   Marco Elver <elver@google.com>
Date:   Wed, 19 Oct 2022 10:58:23 -0700
Message-ID: <CANpmjNMPKokoJVFr9==-0-+O1ypXmaZnQT3hs4Ys0Y4+o86OVA@mail.gmail.com>
Subject: Re: [PATCH v7 18/43] instrumented.h: add KMSAN support
To:     youling 257 <youling257@gmail.com>
Cc:     Alexander Viro <viro@zeniv.linux.org.uk>,
        Alexei Starovoitov <ast@kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Andrey Konovalov <andreyknvl@google.com>,
        Andy Lutomirski <luto@kernel.org>,
        Arnd Bergmann <arnd@arndb.de>, Borislav Petkov <bp@alien8.de>,
        Christoph Hellwig <hch@lst.de>,
        Christoph Lameter <cl@linux.com>,
        David Rientjes <rientjes@google.com>,
        Dmitry Vyukov <dvyukov@google.com>,
        Eric Biggers <ebiggers@kernel.org>,
        Eric Dumazet <edumazet@google.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Herbert Xu <herbert@gondor.apana.org.au>,
        Ilya Leoshkevich <iii@linux.ibm.com>,
        Ingo Molnar <mingo@redhat.com>, Jens Axboe <axboe@kernel.dk>,
        Joonsoo Kim <iamjoonsoo.kim@lge.com>,
        Kees Cook <keescook@chromium.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Matthew Wilcox <willy@infradead.org>,
        "Michael S. Tsirkin" <mst@redhat.com>,
        Pekka Enberg <penberg@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Petr Mladek <pmladek@suse.com>,
        Stephen Rothwell <sfr@canb.auug.org.au>,
        Steven Rostedt <rostedt@goodmis.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Vasily Gorbik <gor@linux.ibm.com>,
        Vegard Nossum <vegard.nossum@oracle.com>,
        Vlastimil Babka <vbabka@suse.cz>, kasan-dev@googlegroups.com,
        linux-mm@kvack.org, linux-arch@vger.kernel.org,
        linux-kernel@vger.kernel.org
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On Wed, 19 Oct 2022 at 10:37, youling 257 <youling257@gmail.com> wrote:
>
>
>
> ---------- Forwarded message ---------
> =E5=8F=91=E4=BB=B6=E4=BA=BA=EF=BC=9A youling257 <youling257@gmail.com>
> Date: 2022=E5=B9=B410=E6=9C=8820=E6=97=A5=E5=91=A8=E5=9B=9B =E4=B8=8A=E5=
=8D=881:36
> 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 usag=
e.
> git bisect linux kernel 6.1rc1, "instrumented.h: add KMSAN support" is a =
bad commit for my android.
>
> 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.)