From: Jiri Olsa <jolsa@redhat.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>, Wang Nan <wangnan0@huawei.com>,
mingo@redhat.com, linux-kernel@vger.kernel.org,
He Kuang <hekuang@huawei.com>,
Alexei Starovoitov <ast@kernel.org>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
Brendan Gregg <brendan.d.gregg@gmail.com>,
Jiri Olsa <jolsa@kernel.org>,
Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
Namhyung Kim <namhyung@kernel.org>, Zefan Li <lizefan@huawei.com>,
pi3orama@163.com
Subject: Re: [RESEND PATCH 0/5] perf core: Support overwrite ring buffer
Date: Tue, 8 Mar 2016 21:44:58 +0100 [thread overview]
Message-ID: <20160308204458.GD7897@krava.redhat.com> (raw)
In-Reply-To: <20160308200746.GE6344@twins.programming.kicks-ass.net>
On Tue, Mar 08, 2016 at 09:07:46PM +0100, Peter Zijlstra wrote:
> On Tue, Mar 08, 2016 at 08:56:42PM +0100, Jiri Olsa wrote:
> > > # cat go-fuzz.sh
> > > #!/bin/bash
> > >
> > > echo 1 > /proc/sys/kernel/traceoff_on_warning
> > > echo 1 > /debug/tracing/options/stacktrace
> > > echo 1 > /debug/tracing/events/sched/enable
> >
> > are you running this under root?
>
> Of course ;-) I'm not even sure these machines have a user account.
>
> Also, what's the point of fuzzing if half your 'fun' options return
> -EPERM.
IIRC the perf fuzzer (one from Vince) could screw your machine having
it run under root
jirka
next prev parent reply other threads:[~2016-03-08 20:45 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-07 3:50 [RESEND PATCH 0/5] perf core: Support overwrite ring buffer Wang Nan
2016-03-07 3:50 ` [RESEND PATCH 1/5] perf core: Introduce new ioctl options to pause and resume " Wang Nan
2016-03-07 3:50 ` [RESEND PATCH 2/5] perf core: Set event's default overflow_handler Wang Nan
2016-03-07 3:50 ` [RESEND PATCH 3/5] perf core: Prepare writing into ring buffer from end Wang Nan
2016-03-07 3:50 ` [RESEND PATCH 4/5] perf core: Add backward attribute to perf event Wang Nan
2016-03-07 3:50 ` [RESEND PATCH 5/5] perf core: Reduce perf event output overhead by new overflow handler Wang Nan
2016-03-08 13:44 ` [RESEND PATCH 0/5] perf core: Support overwrite ring buffer Peter Zijlstra
2016-03-08 13:49 ` Ingo Molnar
2016-03-08 13:57 ` Peter Zijlstra
2016-03-08 15:29 ` Ingo Molnar
2016-03-08 15:35 ` Dmitry Vyukov
2016-03-08 15:54 ` Ingo Molnar
2016-03-08 16:11 ` Dmitry Vyukov
2016-03-08 16:27 ` Ingo Molnar
2016-03-08 16:29 ` Dmitry Vyukov
2016-03-08 16:32 ` Peter Zijlstra
2016-03-08 16:44 ` Ingo Molnar
2016-03-08 16:48 ` Ingo Molnar
2016-03-08 16:59 ` Dmitry Vyukov
2016-03-08 17:24 ` Ingo Molnar
2016-03-08 17:27 ` Dmitry Vyukov
2016-03-08 17:37 ` Ingo Molnar
2016-03-08 17:41 ` Dmitry Vyukov
2016-03-08 17:48 ` Ingo Molnar
2016-03-08 17:56 ` Dmitry Vyukov
2016-03-08 17:56 ` Peter Zijlstra
2016-03-08 17:57 ` Ingo Molnar
2016-03-08 18:02 ` Ingo Molnar
2016-03-08 18:22 ` Ingo Molnar
2016-03-08 18:31 ` Ingo Molnar
2016-03-08 17:55 ` Peter Zijlstra
2016-03-08 16:30 ` Peter Zijlstra
2016-03-09 10:53 ` Borislav Petkov
2016-03-09 11:19 ` Dmitry Vyukov
2016-03-08 19:56 ` Jiri Olsa
2016-03-08 20:07 ` Peter Zijlstra
2016-03-08 20:44 ` Jiri Olsa [this message]
2016-03-08 21:04 ` Peter Zijlstra
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