Messages in this thread | | | Date | Fri, 24 Feb 2012 13:41:50 +0800 | From | Yong Zhang <> | Subject | Re: [PATCH] Extend mwait idle to optimize away CAL and RES interrupts to an idle CPU -v1 |
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On Thu, Feb 23, 2012 at 11:34:11AM -0800, Venki Pallipadi wrote: > On Thu, Feb 23, 2012 at 1:30 AM, Peter Zijlstra <peterz@infradead.org> wrote: > > Why not scheduler_ipi()? > > Was trying to avoid irq_enter/exit. As the work here is done in idle > thread context, I though we could avoid enter/exit.
It seems we could not. At least RCU need it, see commit c5d753a55, otherwise we will get warning like 'RCU used illegally from extended quiescent state!'
Thanks, Yong
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