linux-kernel - Re: [PATCH v3 bpf-next 1/4] tracing/probe: Add PERF_EVENT_IOC_QUERY

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Message-ID: <20190821200701.GI3929@kernel.org>
Date:   Wed, 21 Aug 2019 17:07:01 -0300
From:   Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
To:     Yonghong Song <yhs@...com>
Cc:     Peter Zijlstra <peterz@...radead.org>, Daniel Xu <dxu@...uu.xyz>,
        "bpf@...r.kernel.org" <bpf@...r.kernel.org>,
        Song Liu <songliubraving@...com>,
        Andrii Nakryiko <andriin@...com>,
        "mingo@...hat.com" <mingo@...hat.com>,
        Alexei Starovoitov <ast@...com>,
        "alexander.shishkin@...ux.intel.com" 
        <alexander.shishkin@...ux.intel.com>,
        "jolsa@...hat.com" <jolsa@...hat.com>,
        "namhyung@...nel.org" <namhyung@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Kernel Team <Kernel-team@...com>,
        Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: Re: [PATCH v3 bpf-next 1/4] tracing/probe: Add
 PERF_EVENT_IOC_QUERY_PROBE ioctl

Em Wed, Aug 21, 2019 at 04:54:47PM +0000, Yonghong Song escreveu:
> Arnaldo has a question on bcc mailing list about the hit/miss
> counting of bpf program missed to process events.
 
> https://lists.iovisor.org/g/iovisor-dev/message/1783

PERF_FORMAT_LOST seems to be a good answer to that? See my other reply
to this thread.

- Arnaldo