From: Alexei Starovoitov <ast@plumgrid.com>
To: Kaixu Xia <xiakaixu@huawei.com>,
davem@davemloft.net, acme@kernel.org, mingo@redhat.com,
a.p.zijlstra@chello.nl, masami.hiramatsu.pt@hitachi.com,
jolsa@kernel.org, daniel@iogearbox.net
Cc: wangnan0@huawei.com, linux-kernel@vger.kernel.org,
pi3orama@163.com, hekuang@huawei.com, netdev@vger.kernel.org
Subject: Re: [PATCH V4 1/1] bpf: control events stored in PERF_EVENT_ARRAY maps trace data output when perf sampling
Date: Mon, 19 Oct 2015 19:14:05 -0700 [thread overview]
Message-ID: <5625A36D.8070200@plumgrid.com> (raw)
In-Reply-To: <1445251060-114617-2-git-send-email-xiakaixu@huawei.com>
On 10/19/15 3:37 AM, Kaixu Xia wrote:
> +/* flags for PERF_EVENT_ARRAY maps*/
> +enum {
> + BPF_EVENT_CTL_BIT_CUR = 0,
> + BPF_EVENT_CTL_BIT_ALL = 1,
> + __NR_BPF_EVENT_CTL_BITS,
> +};
> +
> +#define BPF_CTL_BIT_FLAG_MASK \
> + ((1ULL << __NR_BPF_EVENT_CTL_BITS) - 1)
> +#define BPF_CTL_BIT_DUMP_CUR \
> + (1ULL << BPF_EVENT_CTL_BIT_CUR)
> +#define BPF_CTL_BIT_DUMP_ALL \
> + (1ULL << BPF_EVENT_CTL_BIT_ALL)
> +
the above shouldn't be part of uapi header. It can stay in bpf_trace.c
Just document these bits next to helper similar to skb_store_bytes()
The rest looks ok.
It still needs an ack from Peter for perf_event bits
next prev parent reply other threads:[~2015-10-20 2:14 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-19 10:37 [PATCH V4 0/1] bpf: control events stored in PERF_EVENT_ARRAY maps trace data output when perf sampling Kaixu Xia
2015-10-19 10:37 ` [PATCH V4 1/1] " Kaixu Xia
2015-10-20 2:14 ` Alexei Starovoitov [this message]
2015-10-20 2:35 ` xiakaixu
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