From: Oleg Nesterov <oleg@redhat.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: "zhangwei(Jovi)" <jovi.zhangwei@huawei.com>,
Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
Frederic Weisbecker <fweisbec@gmail.com>,
Ingo Molnar <mingo@redhat.com>,
Srikar Dronamraju <srikar@linux.vnet.ibm.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: ftrace multibuffer && rcu (Was: tracing/uprobes: Support ftrace_event_file base multibuffer)
Date: Fri, 14 Jun 2013 19:02:24 +0200 [thread overview]
Message-ID: <20130614170224.GA23890@redhat.com> (raw)
In-Reply-To: <1371227208.9844.333.camel@gandalf.local.home>
On 06/14, Steven Rostedt wrote:
>
> On Fri, 2013-06-14 at 18:04 +0200, Oleg Nesterov wrote:
> >
> > But the main problem is, synchronize_sched() is slow and it is called
> > under the global event_mutex.
>
> But is that really an issue? event_mutex is used to add or remove
> events, and this happens only when we load or unload a module, or add or
> remove a probe. These are mostly user operations that take a relatively
> long time to complete (but not relative to humans).
OK, please ignore then.
Oleg.
next prev parent reply other threads:[~2013-06-14 17:06 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-14 1:44 [PATCH] tracing/uprobes: Support ftrace_event_file base multibuffer zhangwei(Jovi)
2013-06-14 13:21 ` Masami Hiramatsu
2013-06-14 13:51 ` Oleg Nesterov
2013-06-14 14:09 ` Oleg Nesterov
2013-06-14 15:31 ` Steven Rostedt
2013-06-14 16:21 ` Paul E. McKenney
2013-06-14 16:33 ` Steven Rostedt
2013-06-14 17:25 ` Paul E. McKenney
2013-06-17 2:54 ` Masami Hiramatsu
2013-06-17 12:33 ` Steven Rostedt
2013-06-18 1:31 ` Masami Hiramatsu
2013-06-18 2:02 ` Steven Rostedt
2013-06-14 14:44 ` Oleg Nesterov
2013-06-14 16:04 ` ftrace multibuffer && rcu (Was: tracing/uprobes: Support ftrace_event_file base multibuffer) Oleg Nesterov
2013-06-14 16:18 ` Oleg Nesterov
2013-06-14 16:26 ` Steven Rostedt
2013-06-14 17:02 ` Oleg Nesterov [this message]
2013-06-20 16:43 ` [PATCH] tracing/uprobes: Support ftrace_event_file base multibuffer Oleg Nesterov
2013-06-21 8:17 ` zhangwei(Jovi)
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