From: Frederic Weisbecker <fweisbec@gmail.com>
To: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: Ingo Molnar <mingo@elte.hu>, Steven Rostedt <rostedt@goodmis.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 2/3] tracing: block-able ring_buffer consumer
Date: Wed, 2 Sep 2009 01:12:00 +0200 [thread overview]
Message-ID: <20090901231200.GD6108@nowhere> (raw)
In-Reply-To: <20090901230508.GC6108@nowhere>
On Wed, Sep 02, 2009 at 01:05:10AM +0200, Frederic Weisbecker wrote:
> void poll_wait_pipe(struct trace_iterator *iter)
> {
> set_current_state(TASK_INTERRUPTIBLE);
> /* sleep for 100 msecs, and try again. */
> schedule_timeout(HZ / 10);
> }
>
> On the worst case the reader will wait for 1/100 secs
> (the comment is wrong).
No the comment is not wrong. It's just that I really suck in math :-)
>
> You can probably use the same thing for ring buffer splice
> and poll waiters.
>
> Frederic.
>
next prev parent reply other threads:[~2009-09-01 23:12 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-27 3:03 [PATCH 2/3] tracing: block-able ring_buffer consumer Lai Jiangshan
2009-08-29 10:21 ` Frederic Weisbecker
2009-09-01 12:53 ` Lai Jiangshan
2009-09-01 23:05 ` Frederic Weisbecker
2009-09-01 23:12 ` Frederic Weisbecker [this message]
2009-09-09 21:10 ` Steven Rostedt
2009-09-10 2:06 ` Frederic Weisbecker
2009-09-09 21:06 ` Steven Rostedt
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=20090901231200.GD6108@nowhere \
--to=fweisbec@gmail.com \
--cc=laijs@cn.fujitsu.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=rostedt@goodmis.org \
/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.