linux-kernel - Re: [RFC PATCH v3 for 4.15 08/24] Provide cpu

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Message-ID: <1912525106.15295.1510709646867.JavaMail.zimbra@efficios.com>
Date:   Wed, 15 Nov 2017 01:34:06 +0000 (UTC)
From:   Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
To:     Peter Zijlstra <peterz@...radead.org>,
        "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
        Boqun Feng <boqun.feng@...il.com>,
        Andy Lutomirski <luto@...capital.net>,
        Dave Watson <davejwatson@...com>
Cc:     linux-kernel <linux-kernel@...r.kernel.org>,
        linux-api <linux-api@...r.kernel.org>,
        Paul Turner <pjt@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Russell King <linux@....linux.org.uk>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, Andrew Hunter <ahh@...gle.com>,
        Andi Kleen <andi@...stfloor.org>, Chris Lameter <cl@...ux.com>,
        Ben Maurer <bmaurer@...com>, rostedt <rostedt@...dmis.org>,
        Josh Triplett <josh@...htriplett.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Michael Kerrisk <mtk.manpages@...il.com>
Subject: Re: [RFC PATCH v3 for 4.15 08/24] Provide cpu_opv system call

----- On Nov 14, 2017, at 3:03 PM, Mathieu Desnoyers mathieu.desnoyers@...icios.com wrote:
[...]
> diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
> index 3b448ba82225..cab256c1720a 100644
> --- a/kernel/sched/sched.h
> +++ b/kernel/sched/sched.h
> @@ -1209,6 +1209,8 @@ static inline void __set_task_cpu(struct task_struct *p,
> unsigned int cpu)
> #endif
> }
> 
> +int push_task_to_cpu(struct task_struct *p, unsigned int dest_cpu);

Testing on CONFIG_SMP=n showed that I needed to add empty static inline
(returning 0) for !SMP case.

Mathieu


> +
> /*
>  * Tunables that become constants when CONFIG_SCHED_DEBUG is off:
>  */

-- 
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com