Thread (2 messages) 2 messages, 2 authors, 2012-10-22

RT throttling and suspend/resume (was Re: [PATCH] i2c: omap: revert "i2c: omap: switch to threaded IRQ support")

From: peterz@infradead.org (Peter Zijlstra)
Date: 2012-10-22 09:52:21
Also in: linux-i2c, linux-omap

On Fri, 2012-10-19 at 16:54 -0700, Kevin Hilman wrote:
So I did the same thing for my ARM SoC, and it definitley stops the RT
throttling.  

However, it has the undesriable (IMO) side effect of making timed printk
output rather unhelpful for debugging suspend/resume since printk time
stays constant throughout suspend/resume no matter how long you
sleep. :(

So does that mean we have to choose between useful printk times during
suspend/resume or functioning IRQ threads during suspend/resume ?
Urgh.. this was not something I considered. This being primarily the
sched_clock infrastructure and such.

So what exactly is the problem with the suspend resume thing (its not
something I've ever debugged), is all you need a clean break between pre
and post suspend, or do you need the actual time the machine was gone?
Keyboard shortcuts
hback out one level
jnext message in thread
kprevious message in thread
ldrill in
Escclose help / fold thread tree
?toggle this help