From: Andi Kleen <andi@firstfloor.org>
To: Alexei Starovoitov <ast@plumgrid.com>
Cc: Ingo Molnar <mingo@kernel.org>,
Steven Rostedt <rostedt@goodmis.org>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
"H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
Tom Zanussi <tom.zanussi@linux.intel.com>,
Jovi Zhangwei <jovi.zhangwei@gmail.com>,
Eric Dumazet <edumazet@google.com>,
linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH tip 0/5] tracing filters with BPF
Date: Tue, 03 Dec 2013 16:01:59 -0800 [thread overview]
Message-ID: <87fvq9cwlk.fsf@tassilo.jf.intel.com> (raw)
In-Reply-To: <1386044930-15149-1-git-send-email-ast@plumgrid.com> (Alexei Starovoitov's message of "Mon, 2 Dec 2013 20:28:45 -0800")
Alexei Starovoitov <ast@plumgrid.com> writes:
Can you do some performance comparison compared to e.g. ktap?
How much faster is it?
While it sounds interesting, I would strongly advise to make this
capability only available to root. Traditionally lots of complex byte
code languages which were designed to be "safe" and verifiable weren't
really. e.g. i managed to crash things with "safe" systemtap multiple
times. And we all know what happened to Java.
So the likelyhood of this having some hole somewhere (either in
the byte code or in some library function) is high.
-Andi
next prev parent reply other threads:[~2013-12-04 0:02 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-03 4:28 [RFC PATCH tip 0/5] tracing filters with BPF Alexei Starovoitov
2013-12-03 4:28 ` [RFC PATCH tip 1/5] Extended BPF core framework Alexei Starovoitov
2013-12-03 4:28 ` [RFC PATCH tip 2/5] Extended BPF JIT for x86-64 Alexei Starovoitov
2013-12-03 4:28 ` [RFC PATCH tip 3/5] Extended BPF (64-bit BPF) design document Alexei Starovoitov
2013-12-03 17:01 ` H. Peter Anvin
2013-12-03 19:59 ` Alexei Starovoitov
2013-12-03 20:41 ` Frank Ch. Eigler
2013-12-03 21:31 ` Alexei Starovoitov
2013-12-04 9:24 ` Ingo Molnar
2013-12-03 4:28 ` [RFC PATCH tip 4/5] use BPF in tracing filters Alexei Starovoitov
2013-12-04 0:48 ` Masami Hiramatsu
2013-12-04 1:11 ` Steven Rostedt
2013-12-05 0:05 ` Masami Hiramatsu
2013-12-05 5:11 ` Alexei Starovoitov
2013-12-06 8:43 ` Masami Hiramatsu
2013-12-06 10:05 ` Jovi Zhangwei
2013-12-06 23:48 ` Masami Hiramatsu
2013-12-08 18:22 ` Frank Ch. Eigler
2013-12-09 10:12 ` Masami Hiramatsu
2013-12-03 4:28 ` [RFC PATCH tip 5/5] tracing filter examples in BPF Alexei Starovoitov
2013-12-04 0:35 ` Jonathan Corbet
2013-12-04 1:21 ` Alexei Starovoitov
2013-12-03 9:16 ` [RFC PATCH tip 0/5] tracing filters with BPF Ingo Molnar
2013-12-03 15:33 ` Steven Rostedt
2013-12-03 18:26 ` Alexei Starovoitov
2013-12-04 1:13 ` Masami Hiramatsu
2013-12-09 7:29 ` Namhyung Kim
2013-12-09 9:51 ` Masami Hiramatsu
2013-12-03 18:06 ` Alexei Starovoitov
2013-12-04 9:34 ` Ingo Molnar
2013-12-04 17:36 ` Alexei Starovoitov
2013-12-05 10:38 ` Ingo Molnar
2013-12-06 5:43 ` Alexei Starovoitov
2013-12-03 10:34 ` Masami Hiramatsu
2013-12-04 0:01 ` Andi Kleen [this message]
2013-12-04 3:09 ` Alexei Starovoitov
2013-12-05 4:40 ` Alexei Starovoitov
2013-12-05 10:41 ` Ingo Molnar
2013-12-05 13:46 ` Steven Rostedt
2013-12-05 22:36 ` Alexei Starovoitov
2013-12-05 23:37 ` Steven Rostedt
2013-12-06 4:49 ` Alexei Starovoitov
2013-12-10 15:47 ` Ingo Molnar
2013-12-11 2:32 ` Alexei Starovoitov
2013-12-11 3:35 ` Masami Hiramatsu
2013-12-12 2:48 ` Alexei Starovoitov
2013-12-05 16:11 ` Frank Ch. Eigler
2013-12-05 19:43 ` Alexei Starovoitov
2013-12-06 0:14 ` Andi Kleen
2013-12-06 1:10 ` H. Peter Anvin
2013-12-06 1:20 ` Andi Kleen
2013-12-06 1:28 ` H. Peter Anvin
2013-12-06 21:43 ` Frank Ch. Eigler
2013-12-06 5:16 ` Alexei Starovoitov
2013-12-06 23:54 ` Masami Hiramatsu
2013-12-07 1:01 ` Alexei Starovoitov
2013-12-06 5:46 ` Jovi Zhangwei
2013-12-07 1:12 ` Alexei Starovoitov
2013-12-07 16:53 ` Jovi Zhangwei
2013-12-06 5:19 ` Jovi Zhangwei
2013-12-06 23:58 ` Masami Hiramatsu
2013-12-07 16:21 ` Jovi Zhangwei
2013-12-09 4:59 ` Masami Hiramatsu
2013-12-06 6:17 ` Jovi Zhangwei
2013-12-05 16:31 ` Frank Ch. Eigler
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