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Re: Possible regression due to "tick: broadcast: Prevent livelock from event handler"

From Thomas Gleixner <tglx@linutronix.de>
Newsgroups linux.kernel
Subject Re: Possible regression due to "tick: broadcast: Prevent livelock from event handler"
Date 2015-07-03 17:00 +0200
Message-ID <pIaBA-1kt-7@gated-at.bofh.it> (permalink)
References (2 earlier) <pI9cu-AJ-7@gated-at.bofh.it> <pI9ma-E1-31@gated-at.bofh.it> <pI9YS-17f-9@gated-at.bofh.it> <pIaif-1dJ-47@gated-at.bofh.it> <pIarV-1ha-39@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Fri, 3 Jul 2015, Sudeep Holla wrote:
> On 03/07/15 15:37, Wolfram Sang wrote:
> > 
> > > So this is a single core machine and uses the em_sti timer w/o the
> > > broadcast nonsense. In Simons case it looks like em_sti is used as
> > > broadcast device.
> > 
> > We use the same board. Just my kernel has SMP=n.
> > 
> 
> If it's UP build, then GENERIC_CLOCKEVENTS_BROADCAST is disabled. You
> may be hitting the issue I reported[1] and is still under discussion.

Nope. The UP version uses a non affected timer.

Thanks,

	tglx
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Thread

Possible regression due to "tick: broadcast: Prevent livelock from  event handler" Simon Horman <horms@verge.net.au> - 2015-07-03 04:50 +0200
  Re: Possible regression due to "tick: broadcast: Prevent livelock  from event handler" Thomas Gleixner <tglx@linutronix.de> - 2015-07-03 11:30 +0200
  Re: Possible regression due to "tick: broadcast: Prevent livelock  from event handler" Wolfram Sang <wsa@the-dreams.de> - 2015-07-03 13:00 +0200
    Re: Possible regression due to "tick: broadcast: Prevent livelock  from event handler" Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-07-03 13:10 +0200
    Re: Possible regression due to "tick: broadcast: Prevent livelock  from event handler" Thomas Gleixner <tglx@linutronix.de> - 2015-07-03 15:30 +0200
      Re: Possible regression due to "tick: broadcast: Prevent livelock  from event handler" Wolfram Sang <wsa@the-dreams.de> - 2015-07-03 15:40 +0200
        Re: Possible regression due to "tick: broadcast: Prevent livelock  from event handler" Thomas Gleixner <tglx@linutronix.de> - 2015-07-03 16:20 +0200
          Re: Possible regression due to "tick: broadcast: Prevent livelock  from event handler" Wolfram Sang <wsa@the-dreams.de> - 2015-07-03 16:40 +0200
            Re: Possible regression due to "tick: broadcast: Prevent livelock  from event handler" Sudeep Holla <sudeep.holla@arm.com> - 2015-07-03 16:50 +0200
              Re: Possible regression due to "tick: broadcast: Prevent livelock  from event handler" Sudeep Holla <sudeep.holla@arm.com> - 2015-07-03 17:00 +0200
              Re: Possible regression due to "tick: broadcast: Prevent livelock  from event handler" Thomas Gleixner <tglx@linutronix.de> - 2015-07-03 17:00 +0200
            Re: Possible regression due to "tick: broadcast: Prevent livelock  from event handler" Thomas Gleixner <tglx@linutronix.de> - 2015-07-03 17:00 +0200
              Re: Possible regression due to "tick: broadcast: Prevent livelock  from event handler" Wolfram Sang <wsa@the-dreams.de> - 2015-07-03 17:20 +0200
                Re: Possible regression due to "tick: broadcast: Prevent livelock  from event handler" Thomas Gleixner <tglx@linutronix.de> - 2015-07-03 17:30 +0200
                Re: Possible regression due to "tick: broadcast: Prevent livelock  from event handler" Wolfram Sang <wsa@the-dreams.de> - 2015-07-03 17:50 +0200
                Re: Possible regression due to "tick: broadcast: Prevent livelock  from event handler" Thomas Gleixner <tglx@linutronix.de> - 2015-07-03 18:00 +0200
                Re: Possible regression due to "tick: broadcast: Prevent livelock  from event handler" Wolfram Sang <wsa@the-dreams.de> - 2015-07-03 18:10 +0200
            Re: Possible regression due to "tick: broadcast: Prevent livelock  from event handler" Geert Uytterhoeven <geert@linux-m68k.org> - 2015-07-03 19:10 +0200

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