netdev - Re: [PATCH v3 bpf-next 00/11] bpf: revolutionize bpf tracing

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Message-ID: <20191016180107.od7sz3qp6irqjgxe@kafai-mbp.dhcp.thefacebook.com>
Date:   Wed, 16 Oct 2019 18:01:11 +0000
From:   Martin Lau <kafai@...com>
To:     Alexei Starovoitov <ast@...nel.org>
CC:     "davem@...emloft.net" <davem@...emloft.net>,
        "daniel@...earbox.net" <daniel@...earbox.net>,
        "x86@...nel.org" <x86@...nel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "bpf@...r.kernel.org" <bpf@...r.kernel.org>,
        Kernel Team <Kernel-team@...com>
Subject: Re: [PATCH v3 bpf-next 00/11] bpf: revolutionize bpf tracing

On Tue, Oct 15, 2019 at 08:24:54PM -0700, Alexei Starovoitov wrote:
> The end result is safer and faster bpf tracing.
> Safer - because type safe direct load can be used most of the time
> instead of bpf_probe_read().
> Faster - because direct loads are used to walk kernel data structures
> instead of bpf_probe_read() calls.
> Note that such loads can page fault and are supported by
> hidden bpf_probe_read() in interpreter and via exception table
> if program is JITed.
Exciting stuff!

Acked-by: Martin KaFai Lau <kafai@...com>