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References: <20221118190109.1512674-1-namhyung@kernel.org> <dea8c3c5-0739-58c1-9a88-b989878a9b8f@linux.dev>
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From:   Namhyung Kim <namhyung@kernel.org>
Date:   Mon, 9 Jan 2023 12:56:13 -0800
Message-ID: <CAM9d7cjk_7-ALzW1kT961TRLpO9Wt8gNX7+rH4ay4N92g1TYkg@mail.gmail.com>
Subject: Re: [PATCH] perf lock contention: Do not use BPF task local storage
To:     Martin KaFai Lau <martin.lau@linux.dev>
Cc:     Ingo Molnar <mingo@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        LKML <linux-kernel@vger.kernel.org>,
        Ian Rogers <irogers@google.com>,
        Adrian Hunter <adrian.hunter@intel.com>,
        linux-perf-users@vger.kernel.org, Song Liu <song@kernel.org>,
        bpf@vger.kernel.org, Blake Jones <blakejones@google.com>,
        Chris Li <chriscli@google.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Jiri Olsa <jolsa@kernel.org>
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Hello,

On Mon, Nov 21, 2022 at 9:33 AM Martin KaFai Lau <martin.lau@linux.dev> wrote:
>
> On 11/18/22 11:01 AM, Namhyung Kim wrote:
> > We could fix the task local storage to use the safe BPF allocator,
> > but it takes time so let's change this until it happens actually.
>
> I also got another report on the kfree_rcu path.  I am also looking into this
> direction on using the BPF allocator.

Any progress on this?  Are there any concerns about the change?

Thanks,
Namhyung