From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C75D3C32751 for ; Wed, 7 Aug 2019 17:49:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9177821E71 for ; Wed, 7 Aug 2019 17:49:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="V6npBXkA" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387999AbfHGRta (ORCPT ); Wed, 7 Aug 2019 13:49:30 -0400 Received: from mail-lj1-f194.google.com ([209.85.208.194]:45474 "EHLO mail-lj1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388600AbfHGRta (ORCPT ); Wed, 7 Aug 2019 13:49:30 -0400 Received: by mail-lj1-f194.google.com with SMTP id m23so86216116lje.12 for ; Wed, 07 Aug 2019 10:49:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=6V0A6GCEg68jXtpGy/UsDgt2jqmpxm72Evgj1E9HNn0=; b=V6npBXkAkJlRMugacUa+LOLTEMJh46lTlcl/Ol59vtG0Gx0QPRipAAHJSPOx8B4CLd Dt/O1uB4chZ6VUeq/VxSAWCxkbdAKoDyN9md3kNL+OmqicIq6Nw+c1f1n9Sd8yHW1OS3 ofEg8AUKGCTC8DZd11muHjEZWUxf8kmpPt2j4zeW/p++gVboMBJX/hRl4blsIK/uJ/8w L5jIEYEf57JWGHi/TVjxCX54Qu9lFUgcBLNH48NGFELdVxGT7Y/wKRGfoYcbuOIzjCUL Z7AQHDKgvl2U+3h+O7Cv8Kh7O2cZfJijRzkhTSuRBYWT/jJpr4yA3/LiKDhIgwT8WE1U x5iw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=6V0A6GCEg68jXtpGy/UsDgt2jqmpxm72Evgj1E9HNn0=; b=M+as9fYXtVPSfMqgE3CCgtB/F647Rp6EeaJ5IEOTLqKumSC/7k8pZBBHkpfpQiuxzp Ll5+8v0a1JCPNoq4RoESM60iEZqMtDmplN85BWuxrpzWgizbAnduyIVZVhobCs76kQs1 UXG3ATiMyCEW3t24PVyu/poOlrN0g7eGhRlyE/84oI3olOWbuI459p12oJa39RGbh78d 1IelFlLPO3nz+SPFmr165Bs5iPxdiNJhNTzPI279gRYYy3I+oDl3+48z34g3DMSARbLe OerqnZDDDZRwnjo8aD9bTha5txv1+QVctmTt+zUlwi82SOb4ew8brtFJeqVcorUwSBri Bzfg== X-Gm-Message-State: APjAAAXo82HKUNQ4JoXVS0ZoH7Nlx+N4YNPPv5FAkSHNAhkj0LkQIHUX YjRVaiUU4A5E7WbKSahk0kiuqFhOi19MZTqgNhQ= X-Google-Smtp-Source: APXvYqwJzsATP7kl4zzRMwWAbi2f1Qneh/Ydlq5pfJJtgSBk4v6vS5rueG00X5o/XazIxY3Ij5e0XdKM2ziJGRVt+Y8= X-Received: by 2002:a2e:9a87:: with SMTP id p7mr5517205lji.133.1565200168137; Wed, 07 Aug 2019 10:49:28 -0700 (PDT) MIME-Version: 1.0 References: <20190806233826.2478-1-dxu@dxuuu.xyz> In-Reply-To: <20190806233826.2478-1-dxu@dxuuu.xyz> From: Song Liu Date: Wed, 7 Aug 2019 10:49:16 -0700 Message-ID: Subject: Re: [PATCH 0/3] Add PERF_EVENT_IOC_QUERY_KPROBE ioctl To: Daniel Xu Cc: Song Liu , Yonghong Song , Andrii Nakryiko , bpf , Kernel Team Content-Type: text/plain; charset="UTF-8" Sender: bpf-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org On Tue, Aug 6, 2019 at 4:39 PM Daniel Xu wrote: > > It's useful to know kprobe's nmissed and nhit stats. For example with > tracing tools, it's important to know when events may have been lost. > There is currently no way to get that information from the perf API. > This patch adds a new ioctl that lets users query this information. > Part of the change is on perf side, so please include linux-kernel and perf mantainers and reviewers: M: Peter Zijlstra M: Ingo Molnar M: Arnaldo Carvalho de Melo R: Alexander Shishkin R: Jiri Olsa R: Namhyung Kim L: linux-kernel@vger.kernel.org I guess this is based on bpf-next tree. So please use subject perfix [PATCH bpf-next] ([PATCH v2 bpf-next] when resend). Thanks, Song