Thomas, On 06/18, Mark Rutland wrote: > On Thu, Jun 13, 2013 at 07:39:50PM +0100, Stephen Boyd wrote: > > On 06/13, Thomas Gleixner wrote: > > > On Thu, 13 Jun 2013, Daniel Lezcano wrote: > > > > I prefer Thomas to have a look at it and ack it. I changed Cc to To for > > > > Thomas. > > > > > > The patch does not apply on tip timers/core. The code has been > > > reworked a month ago. Please work against tip timers/core. That's > > > where this stuff ends up. > > > > > > > Ah, I thought your patch series had stalled. Here is a refreshed > > patch. Every other patch in this series applies cleanly to tip > > timers/core so I don't want to resend them again unless > > absolutely necessary. > > > > -----8<----- > > Subject: [PATCH v8] clockevents: Prefer CPU local devices over global devices > > > > On an SMP system with only one global clockevent and a dummy > > clockevent per CPU we run into problems. We want the dummy > > clockevents to be registered as the per CPU tick devices, but > > we can only achieve that if we register the dummy clockevents > > before the global clockevent or if we artificially inflate the > > rating of the dummy clockevents to be higher than the rating > > of the global clockevent. Failure to do so leads to boot > > hangs when the dummy timers are registered on all other CPUs > > besides the CPU that accepted the global clockevent as its tick > > device and there is no broadcast timer to poke the dummy > > devices. > > > > If we're registering multiple clockevents and one clockevent is > > global and the other is local to a particular CPU we should > > choose to use the local clockevent regardless of the rating of > > the device. This way, if the clockevent is a dummy it will take > > the tick device duty as long as there isn't a higher rated tick > > device and any global clockevent will be bumped out into > > broadcast mode, fixing the problem described above. > > > > Reported-by: Mark Rutland <mark.rutland@xxxxxxx> > > Cc: John Stultz <john.stultz@xxxxxxxxxx> > > Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> > > Cc: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx> > > Signed-off-by: Stephen Boyd <sboyd@xxxxxxxxxxxxxx> > > I've just tested this atop of tip/timers/core on a tc2, using only the > sp804. As previously, without the patch boot hangs, and with the patch > I'm able to reach userspace and do useful things. > > Tested-by: Mark Rutland <mark.rutland@xxxxxxx> > > Thanks for working on this, Stephen. Can you pick up the first two patches in this series please? And preferably make a stable branch that can be pulled into arm-soc? Then I can send the rest through the arm-soc tree. -- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
