From: Peter Zijlstra <peterz@infradead.org>
To: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>,
Steven Rostedt <rostedt@goodmis.org>,
Vince Weaver <vincent.weaver@maine.edu>,
LKML <linux-kernel@vger.kernel.org>,
Ingo Molnar <mingo@kernel.org>, Dave Jones <davej@redhat.com>
Subject: Re: perf/tracepoint: another fuzzer generated lockup
Date: Sun, 17 Nov 2013 10:43:20 +0100 [thread overview]
Message-ID: <20131117094320.GN16796@laptop.programming.kicks-ass.net> (raw)
In-Reply-To: <52887617.7050302@hitachi.com>
On Sun, Nov 17, 2013 at 04:53:59PM +0900, Masami Hiramatsu wrote:
> Agreed.
> FYI, kprobes has a recursion detection counter and it is reported via
> debugfs/tracing/kprobe_profile :)
Perf also has a recursion counter (4 actually, not reported to
userspace), but the problem with the irq_work_exit thing is that its a
non-recursive event loop, so recursion checks don't actually work to
catch it.
next prev parent reply other threads:[~2013-11-17 9:43 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-08 19:45 perf/tracepoint: another fuzzer generated lockup Vince Weaver
2013-11-08 20:06 ` Vince Weaver
2013-11-08 20:02 ` Frederic Weisbecker
2013-11-08 20:23 ` Vince Weaver
2013-11-08 20:48 ` Frederic Weisbecker
2013-11-08 21:15 ` Vince Weaver
2013-11-08 22:24 ` Frederic Weisbecker
2013-11-08 22:36 ` Frederic Weisbecker
2013-11-09 1:09 ` Steven Rostedt
2013-11-09 14:10 ` Peter Zijlstra
2013-11-09 14:20 ` Frederic Weisbecker
2013-11-11 12:44 ` Ingo Molnar
2013-11-11 15:53 ` Peter Zijlstra
2013-11-11 21:13 ` Ingo Molnar
2013-11-09 14:52 ` Frederic Weisbecker
2013-11-09 15:13 ` Peter Zijlstra
2013-11-09 15:27 ` Frederic Weisbecker
2013-11-09 15:59 ` Peter Zijlstra
2013-11-09 16:08 ` Frederic Weisbecker
2013-11-09 15:11 ` Peter Zijlstra
2013-11-09 15:22 ` Frederic Weisbecker
2013-11-09 15:30 ` Peter Zijlstra
2013-11-14 15:23 ` Peter Zijlstra
2013-11-14 15:33 ` Peter Zijlstra
2013-11-14 15:35 ` Frederic Weisbecker
2013-11-15 1:16 ` Masami Hiramatsu
2013-11-15 12:28 ` Peter Zijlstra
2013-11-15 14:15 ` Steven Rostedt
2013-11-15 14:28 ` Frederic Weisbecker
2013-11-17 7:53 ` Masami Hiramatsu
2013-11-17 9:43 ` Peter Zijlstra [this message]
2013-11-14 16:03 ` Frederic Weisbecker
2013-11-14 17:20 ` Vince Weaver
2013-11-14 17:14 ` Peter Zijlstra
2013-11-14 17:41 ` Steven Rostedt
2013-11-14 19:18 ` Vince Weaver
2013-11-19 19:18 ` [tip:perf/urgent] ftrace, perf: Avoid infinite event generation loop tip-bot for Peter Zijlstra
2013-11-09 0:25 ` perf/tracepoint: another fuzzer generated lockup Frederic Weisbecker
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