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)
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20130614170224.GA23890@redhat.com \
--to=oleg@redhat.com \
--cc=fweisbec@gmail.com \
--cc=jovi.zhangwei@huawei.com \
--cc=linux-kernel@vger.kernel.org \
--cc=masami.hiramatsu.pt@hitachi.com \
--cc=mingo@redhat.com \
--cc=rostedt@goodmis.org \
--cc=srikar@linux.vnet.ibm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.