Peter Zijlstra <peterz@xxxxxxxxxxxxx> writes: > On Thu, 2012-10-18 at 08:51 +0300, Felipe Balbi wrote: >> > So the primary question remains: is RT runtime supposed to include the >> > time spent suspended? I suspect not. >> >> you might be right there, though we need Thomas or Peter to answer :-s > > re, sorry both tglx and I have been traveling, he still is, I'm trying > to play catch-up :-) No worries, thanks for the help. > Anyway, yeah I'm somewhat surprised the clock is 'running' when the > machine isn't. From what I could gather, this is !x86 hardware, right? > > x86 explicitly makes sure our clocks are 'stopped' during suspend, see > commit cd7240c0b900eb6d690ccee088a6c9b46dae815a. > > Can you do something similar for ARM? A quick look at > arch/arm/kernel/sched_clock.c shows there's already suspend/resume > hooks, do they do the wrong thing? No, they do the right thing, but only if they're asked by the SoC-specific code that registers a sched_clock. Changing the SoC specific code to use the 'needs_suspend' API gets things working perfectly. Thanks, Kevin -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
