lkml.org 
[lkml]   [2016]   [Aug]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: sched: current instead rq->current
From
Date
On Mon, 2016-08-15 at 21:30 +0200, Colin Vidal wrote:
> Hello,
>
> At the beginning of __schedule (kernel/sched/core.c), the current
> task
> is get with rq->curr. I try to to understand why not directly using
> current instead?
>
> Since a runqueue is specific to a CPU, it dosen't make sense to get
> the
> the current task of another CPU's runqueue. Yes?
>
> I try the following of Linus's master branch
>
> -       int cpu;
>  
> -       cpu = smp_processor_id();
> -       rq = cpu_rq(cpu);
> -       prev = rq->curr;
> +       rq = cpu_rq(smp_processor_id());
> +       prev = current;
>
> and it seems to work (only tested on x86-64), but... To simple?
>
> Thanks!
>
> Colin

I realize that I have forgotten to add scheduler subsystem in CC... So
I do it now. Sorry for double post.

Thanks

Colin

\
 
 \ /
  Last update: 2016-09-17 09:57    [W:0.061 / U:0.604 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site