Messages in this thread | | | Date | Tue, 12 Aug 2014 20:39:37 -0400 (EDT) | From | Nicolas Pitre <> | Subject | Re: [PATCH v2] irqchip: gic: Allow gic_arch_extn hooks to call into scheduler |
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On Tue, 12 Aug 2014, Stephen Boyd wrote:
> On 08/05/14 19:34, Nicolas Pitre wrote: > > > >> It allows us to synchronize with another CPU that may be inside > >> gic_raise_softirq(). If the other CPU was in that function then this CPU > >> would wait until it was done sending the IPI to continue along and > >> reroute them. If the other CPU was just about to grab the sgi lock then > >> we would guarantee that the CPU would see the new gic_cpu_map value and > >> thus any redirection is not necessary. > > OK I get it now. > > > >> I hoped that the commit text explained this. > > I'm possibly not bright enough to get it the first time. > > > >> Honestly it probably isn't a noticeable performance boost either way > >> but I think this is the best we can do. > > Sure, agreed. > > > > > > > > Ok, so which patch is preferred?
I'd say the later.
Nicolas
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