Re: [RFC][PATCH 00/32] Nohz cpusets v2 (adaptive tickless kernel)
[Posted May 23, 2012 by corbet]
| From: |
| Thomas Gleixner <tglx-AT-linutronix.de> |
| To: |
| Steven Rostedt <rostedt-AT-goodmis.org> |
| Subject: |
| Re: [RFC][PATCH 00/32] Nohz cpusets v2 (adaptive tickless kernel) |
| Date: |
| Wed, 23 May 2012 00:22:51 +0200 (CEST) |
| Message-ID: |
| <alpine.LFD.2.02.1205230020170.3231@ionos> |
| Cc: |
| Peter Zijlstra <peterz-AT-infradead.org>,
Gilad Ben-Yossef <gilad-AT-benyossef.com>,
Frederic Weisbecker <fweisbec-AT-gmail.com>,
LKML <linux-kernel-AT-vger.kernel.org>,
linaro-sched-sig-AT-lists.linaro.org,
Alessio Igor Bogani <abogani-AT-kernel.org>,
Andrew Morton <akpm-AT-linux-foundation.org>,
Avi Kivity <avi-AT-redhat.com>,
Chris Metcalf <cmetcalf-AT-tilera.com>,
Christoph Lameter <cl-AT-linux.com>,
Daniel Lezcano <daniel.lezcano-AT-linaro.org>,
Geoff Levand <geoff-AT-infradead.org>,
Ingo Molnar <mingo-AT-kernel.org>,
Max Krasnyansky <maxk-AT-qualcomm.com>,
"Paul E. McKenney" <paulmck-AT-linux.vnet.ibm.com>,
Stephen Hemminger <shemminger-AT-vyatta.com>,
Sven-Thorsten Dietrich <thebigcorporation-AT-gmail.com>,
Zen Lin <zen-AT-openhuawei.org> |
| Archive-link: |
| Article, Thread
|
On Tue, 22 May 2012, Steven Rostedt wrote:
> On Tue, 2012-05-22 at 23:31 +0200, Thomas Gleixner wrote:
>
> > diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c
> > index 590900c..dc8ecc3 100644
> > --- a/arch/x86/kernel/tsc.c
> > +++ b/arch/x86/kernel/tsc.c
> > @@ -109,6 +109,10 @@ static int __init tsc_setup(char *str)
> > {
> > if (!strcmp(str, "reliable"))
> > tsc_clocksource_reliable = 1;
> > + if (!strcmp(str, "perfect")) {
> > + tsc_clocksource_reliable = 1;
> > + sched_clock_stable = 1;
> > + }
>
> else if(!strcmp(str, "pony")) {
> tsc_clocksource_reliable = 1;
> sched_clock_stable = 1;
> tsc_perfect_smp_synchronization = 1;
else if (!strcmp(str, "real")
panic("Can't handle real TSCs!\n");
(
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