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Mon, 25 Oct 2021 21:57:31 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0145.hostedemail.com [216.40.44.145]) by kanga.kvack.org (Postfix) with ESMTP id A47F4940007 for ; Mon, 25 Oct 2021 21:57:31 -0400 (EDT) Received: from smtpin06.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 4CE24183C8A8A for ; Tue, 26 Oct 2021 01:57:31 +0000 (UTC) X-FDA: 78736926702.06.AD38166 Received: from mail-il1-f170.google.com (mail-il1-f170.google.com [209.85.166.170]) by imf24.hostedemail.com (Postfix) with ESMTP id E740CB00009D for ; Tue, 26 Oct 2021 01:57:30 +0000 (UTC) Received: by mail-il1-f170.google.com with SMTP id y14so458136ilv.10 for ; Mon, 25 Oct 2021 18:57:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=h1mFkqw1bYSFeCSrd/PEtQdSLUT1fyZYNbF/5Y+ggX8=; b=MwNfeqG2aIp1bt36kgpdSUAwOlAC6WEpYKTinXDmuGHvBvwPfR3h7B0nbR9mI3G9XV 4tS7PwJgWjgJ6/s3PYwCC/gbeM67Ofj22f56oaF5LRWRRZi50oq781H0CzOaA3QhvD3D DpF3nJ+LB3ABE51rgVQSBySmLhezzoci6ofwgJDEgXZRm1s2uwdWyB646pDAPLjDOsWo 5UlQde3obRCPFYkzcrw1qC3BJa1C/eloF6aGI6lTUX+/2jRTZktBqe8GbT33W1OkVMip bp+V/0ju65JpOXFygFAjrHZPlB8qK2p/d3aduS4GRYQQytcd39NpS0FzO+hP6Chi6Hpe dawA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=h1mFkqw1bYSFeCSrd/PEtQdSLUT1fyZYNbF/5Y+ggX8=; b=Ew8EPkb9oai9f3eOlL1BzXusCkGN89CvINx7ItS8Ahvqg6SuHJUbpIH3Ub9Ut83QbV yjKDliA0k1Y6JK3U6tdvOWpWqhuHPywES6H4vy5JathR47hkAiZX1fs8pkqB4z3dRXUJ 3DODCpT481kFW6uqDOq/QD2crXjAjXnt/2ux+FMUNcA9Xw5lzNO0uX8gYJuhms82hfwl 2w7u06mZqTRqMxwPrzvdKphhlAeO4okOHtOxWi6oDaAQZtyD2xMbydAtbslp9blReTrI orw94NLcghrTS1Cl8r4ShJAaaTwPUs/vTiG17WM4lV5JC64+Lk25tLSohlRyg5WqaPTm 6Suw== X-Gm-Message-State: AOAM533GmPkx8coQuQvyS+XQ/enbq01kND74zc7niKvxe3yo/k8K9Rhw +xLXB4DuC/aXINEt2Ix6btY+S9lfchq6jnuuhwtr4/zZgLS2eg== X-Google-Smtp-Source: ABdhPJwHUG7WEz08Z8XERQPU7oIm9JZmJrAVZWUlfDNKkrt5XkUcnFIX776HdHhY+ONTUXiXDv4QL+xeFeg1LnRgGFk= X-Received: by 2002:a05:6e02:20e7:: with SMTP id q7mr13181212ilv.254.1635213449350; Mon, 25 Oct 2021 18:57:29 -0700 (PDT) MIME-Version: 1.0 References: <20211025083315.4752-1-laoar.shao@gmail.com> <20211025083315.4752-8-laoar.shao@gmail.com> <202110251421.0CD56F8@keescook> In-Reply-To: <202110251421.0CD56F8@keescook> From: Yafang Shao Date: Tue, 26 Oct 2021 09:56:53 +0800 Message-ID: Subject: Re: [PATCH v6 07/12] samples/bpf/offwaketime_kern: make sched_switch tracepoint args adopt to comm size change To: Kees Cook Cc: Andrew Morton , Steven Rostedt , Mathieu Desnoyers , Arnaldo Carvalho de Melo , Petr Mladek , Peter Zijlstra , Al Viro , Valentin Schneider , Qiang Zhang , robdclark , christian , Dietmar Eggemann , Ingo Molnar , Juri Lelli , Vincent Guittot , David Miller , Jakub Kicinski , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin Lau , Song Liu , Yonghong Song , john fastabend , KP Singh , dennis.dalessandro@cornelisnetworks.com, mike.marciniszyn@cornelisnetworks.com, dledford@redhat.com, jgg@ziepe.ca, linux-rdma@vger.kernel.org, netdev , bpf , "linux-perf-use." , linux-fsdevel@vger.kernel.org, Linux MM , LKML , kernel test robot , kbuild test robot , Andrii Nakryiko Content-Type: text/plain; charset="UTF-8" X-Stat-Signature: b7p3zwbwnrkuh691rgiyzkeq31bdiuui Authentication-Results: imf24.hostedemail.com; dkim=pass header.d=gmail.com header.s=20210112 header.b=MwNfeqG2; spf=pass (imf24.hostedemail.com: domain of laoar.shao@gmail.com designates 209.85.166.170 as permitted sender) smtp.mailfrom=laoar.shao@gmail.com; dmarc=pass (policy=none) header.from=gmail.com X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: E740CB00009D X-HE-Tag: 1635213450-477371 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Tue, Oct 26, 2021 at 5:21 AM Kees Cook wrote: > > On Mon, Oct 25, 2021 at 08:33:10AM +0000, Yafang Shao wrote: > > The sched:sched_switch tracepoint is derived from kernel, we should make > > its args compitable with the kernel. > > > > Signed-off-by: Yafang Shao > > Cc: Mathieu Desnoyers > > Cc: Arnaldo Carvalho de Melo > > Cc: Andrii Nakryiko > > Cc: Peter Zijlstra > > Cc: Steven Rostedt > > Cc: Al Viro > > Cc: Kees Cook > > Cc: Petr Mladek > > --- > > samples/bpf/offwaketime_kern.c | 4 ++-- > > Seems this should be merged with the prior bpf samples patch? > Sure > > > 1 file changed, 2 insertions(+), 2 deletions(-) > > > > diff --git a/samples/bpf/offwaketime_kern.c b/samples/bpf/offwaketime_kern.c > > index 4866afd054da..eb4d94742e6b 100644 > > --- a/samples/bpf/offwaketime_kern.c > > +++ b/samples/bpf/offwaketime_kern.c > > @@ -113,11 +113,11 @@ static inline int update_counts(void *ctx, u32 pid, u64 delta) > > /* taken from /sys/kernel/debug/tracing/events/sched/sched_switch/format */ > > struct sched_switch_args { > > unsigned long long pad; > > - char prev_comm[16]; > > + char prev_comm[TASK_COMM_LEN]; > > int prev_pid; > > int prev_prio; > > long long prev_state; > > - char next_comm[16]; > > + char next_comm[TASK_COMM_LEN]; > > int next_pid; > > int next_prio; > > }; > > -- > > 2.17.1 > > > > -- > Kees Cook -- Thanks Yafang