On Fri, Jul 18, 2014 at 01:30:52PM -0400, Pranith Kumar wrote:
> Hi Paul,
>
> While running the kvm rcutorture test scripts, I encountered a build failure
> caused by
>
> Commit 918179699e4a ("rcu: Don't keep timekeeping CPU tick running for
> non-nohz_full= CPUs")
>
> This commit fixes the failure. This is on top of paul/rcu/dev.
>
> Signed-off-by: Pranith Kumar <bobby.pr...@gmail.com>
> ---
> kernel/rcu/tree_plugin.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
> index 5591276..eaa32e4 100644
> --- a/kernel/rcu/tree_plugin.h
> +++ b/kernel/rcu/tree_plugin.h
> @@ -2795,7 +2795,7 @@ static void rcu_sysidle_exit(struct rcu_dynticks *rdtp,
> int irq)
> * CPU to keep a tick on our behalf. We assume that the timekeeping
> * CPU is also a nohz_full= CPU.
> */
> - if (!tick_nohz_full_cpu(cpu))
> + if (!tick_nohz_full_cpu(smp_processor_id()))
Good catch, but please see 770d957e (rcu: Don't keep timekeeping CPU
tick running for non-nohz_full= CPUs). ;-)
Thanx, Paul
> return;
>
> /* Update system-idle state: We are clearly no longer fully idle! */
> --
> 1.9.1
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