lkml.org 
[lkml]   [2014]   [Aug]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v2] irqchip: gic: Allow gic_arch_extn hooks to call into scheduler
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


\
 
 \ /
  Last update: 2014-08-13 03:01    [W:0.043 / U:0.304 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site