lkml.org 
[lkml]   [2020]   [Oct]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v4 2/4] sched/isolation: Extend nohz_full to isolate managed IRQs
On Mon, Sep 28, 2020 at 02:35:27PM -0400, Nitesh Narayan Lal wrote:
> Extend nohz_full feature set to include isolation from managed IRQS. This

So you say it's for managed-irqs, the feature is actually called
MANAGED_IRQ, but, AFAICT, it does *NOT* in fact affect managed IRQs.

Also, as per Thomas' earlier points, managed-irqs are in fact perfectly
fine and don't need help at at...

> is required specifically for setups that only uses nohz_full and still
> requires isolation for maintaining lower latency for the listed CPUs.
>
> Suggested-by: Frederic Weisbecker <frederic@kernel.org>
> Signed-off-by: Nitesh Narayan Lal <nitesh@redhat.com>
> ---
> kernel/sched/isolation.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/kernel/sched/isolation.c b/kernel/sched/isolation.c
> index 5a6ea03f9882..9df9598a9e39 100644
> --- a/kernel/sched/isolation.c
> +++ b/kernel/sched/isolation.c
> @@ -141,7 +141,7 @@ static int __init housekeeping_nohz_full_setup(char *str)
> unsigned int flags;
>
> flags = HK_FLAG_TICK | HK_FLAG_WQ | HK_FLAG_TIMER | HK_FLAG_RCU |
> - HK_FLAG_MISC | HK_FLAG_KTHREAD;
> + HK_FLAG_MISC | HK_FLAG_KTHREAD | HK_FLAG_MANAGED_IRQ;
>
> return housekeeping_setup(str, flags);
> }
> --
> 2.18.2
>

\
 
 \ /
  Last update: 2020-10-23 15:25    [W:0.224 / U:0.748 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site