Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1359741

Re: RFC on fixing mutex spinning on owner

From Thomas Gleixner <tglx@linutronix.de>
Newsgroups linux.kernel
Subject Re: RFC on fixing mutex spinning on owner
Date 2016-03-17 12:20 +0100
Message-ID <rdE8a-6IF-21@gated-at.bofh.it> (permalink)
References (2 earlier) <rdtcK-7ER-27@gated-at.bofh.it> <rdvHA-UH-7@gated-at.bofh.it> <rdAHg-4j7-7@gated-at.bofh.it> <rdC6m-5mE-15@gated-at.bofh.it> <rdDc6-65q-11@gated-at.bofh.it>
Organization linux.* mail to news gateway

Show all headers | View raw

On Thu, 17 Mar 2016, Peter Zijlstra wrote:
> Also, maybe the tracer should measure the time from need_resched()
> getting true until the next preemption point, instead of the entire time
> preemption was disabled. Which would avoid the entire issue altogether.

Well, that only gives you the information on a actual preemption, but not
information about long preempt disabled regions which can cause a problem
eventually.

Thanks,

	tglx

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

RFC on fixing mutex spinning on owner Joel Fernandes <agnel.joel@gmail.com> - 2016-03-17 00:30 +0100
  Re: RFC on fixing mutex spinning on owner Greg Kroah-Hartman <greg@kroah.com> - 2016-03-17 00:40 +0100
    Re: RFC on fixing mutex spinning on owner Joel Fernandes <agnel.joel@gmail.com> - 2016-03-17 00:40 +0100
      Re: RFC on fixing mutex spinning on owner Steven Rostedt <rostedt@goodmis.org> - 2016-03-17 03:20 +0100
        Re: RFC on fixing mutex spinning on owner Joel Fernandes <agnel.joel@gmail.com> - 2016-03-17 06:40 +0100
          Re: RFC on fixing mutex spinning on owner Steven Rostedt <rostedt@goodmis.org> - 2016-03-17 13:10 +0100
        Re: RFC on fixing mutex spinning on owner Peter Zijlstra <peterz@infradead.org> - 2016-03-17 08:40 +0100
          Re: RFC on fixing mutex spinning on owner Nicholas Mc Guire <der.herr@hofr.at> - 2016-03-17 10:10 +0100
            Re: RFC on fixing mutex spinning on owner Peter Zijlstra <peterz@infradead.org> - 2016-03-17 11:20 +0100
              Re: RFC on fixing mutex spinning on owner Thomas Gleixner <tglx@linutronix.de> - 2016-03-17 12:20 +0100
                Re: RFC on fixing mutex spinning on owner Steven Rostedt <rostedt@goodmis.org> - 2016-03-17 13:10 +0100
                Re: RFC on fixing mutex spinning on owner Peter Zijlstra <peterz@infradead.org> - 2016-03-17 13:20 +0100
                Re: RFC on fixing mutex spinning on owner Thomas Gleixner <tglx@linutronix.de> - 2016-03-17 14:40 +0100
                Re: RFC on fixing mutex spinning on owner Nicholas Mc Guire <der.herr@hofr.at> - 2016-03-17 17:50 +0100

csiph-web