netdev - Re: [PATCH bpf-next 1/2] bpf: allow __sk_buff tstamp in BPF_PROG_TEST

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Message-ID: <20191015203439.ilp7kp63mfruuzpc@kafai-mbp.dhcp.thefacebook.com>
Date:   Tue, 15 Oct 2019 20:34:49 +0000
From:   Martin Lau <kafai@...com>
To:     Stanislav Fomichev <sdf@...gle.com>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "bpf@...r.kernel.org" <bpf@...r.kernel.org>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "ast@...nel.org" <ast@...nel.org>,
        "daniel@...earbox.net" <daniel@...earbox.net>
Subject: Re: [PATCH bpf-next 1/2] bpf: allow __sk_buff tstamp in
 BPF_PROG_TEST_RUN

On Tue, Oct 15, 2019 at 11:31:24AM -0700, Stanislav Fomichev wrote:
> It's useful for implementing EDT related tests (set tstamp, run the
> test, see how the tstamp is changed or observe some other parameter).
> 
> Note that bpf_ktime_get_ns() helper is using monotonic clock, so for
> the BPF programs that compare tstamp against it, tstamp should be
> derived from clock_gettime(CLOCK_MONOTONIC, ...).
Please provide a cover letter next time.  It makes ack-all possible.

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