linux-kernel - Re: [PATCH v2 10/33] x86/intel_rdt: Implement scheduling support for Intel RDT

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Message-ID: <CACbG3083LzvHH9_PNngvJLA2nGH7uKtg0Do2nA91AOxDRKab7w@mail.gmail.com>
Date:   Tue, 13 Sep 2016 12:55:38 -0500
From:   Nilay Vaish <nilayvaish@...il.com>
To:     Fenghua Yu <fenghua.yu@...el.com>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        "H. Peter Anvin" <h.peter.anvin@...el.com>,
        Ingo Molnar <mingo@...e.hu>, Tony Luck <tony.luck@...el.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Tejun Heo <tj@...nel.org>, Borislav Petkov <bp@...e.de>,
        Stephane Eranian <eranian@...gle.com>,
        Marcelo Tosatti <mtosatti@...hat.com>,
        David Carrillo-Cisneros <davidcc@...gle.com>,
        Shaohua Li <shli@...com>,
        Ravi V Shankar <ravi.v.shankar@...el.com>,
        Vikas Shivappa <vikas.shivappa@...ux.intel.com>,
        Sai Prakhya <sai.praneeth.prakhya@...el.com>,
        linux-kernel <linux-kernel@...r.kernel.org>, x86 <x86@...nel.org>
Subject: Re: [PATCH v2 10/33] x86/intel_rdt: Implement scheduling support for
 Intel RDT

On 8 September 2016 at 04:57, Fenghua Yu <fenghua.yu@...el.com> wrote:
> diff --git a/arch/x86/kernel/cpu/intel_rdt.c b/arch/x86/kernel/cpu/intel_rdt.c
> index 9cf3a7d..9f30492 100644
> --- a/arch/x86/kernel/cpu/intel_rdt.c
> +++ b/arch/x86/kernel/cpu/intel_rdt.c
> @@ -21,6 +21,8 @@
>   */
>  #include <linux/slab.h>
>  #include <linux/err.h>
> +#include <linux/sched.h>
> +#include <asm/pqr_common.h>
>  #include <asm/intel_rdt.h>
>
>  /*
> @@ -41,12 +43,28 @@ static cpumask_t rdt_cpumask;
>   */
>  static cpumask_t tmp_cpumask;
>  static DEFINE_MUTEX(rdtgroup_mutex);
> +struct static_key __read_mostly rdt_enable_key = STATIC_KEY_INIT_FALSE;

I had pointed this for the previous version of the patch as well.  You
should use DEFINE_STATIC_KEY_FALSE(rdt_enable_key), instead of what
you have here.

--
Nilay