linux-kernel - Re: [PATCH v2 23/33] x86/intel_rdt_rdtgroup.c: User interface for RDT

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Date:   Thu, 8 Sep 2016 16:59:04 +0200 (CEST)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Fenghua Yu <fenghua.yu@...el.com>
cc:     "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 23/33] x86/intel_rdt_rdtgroup.c: User interface for
 RDT

On Thu, 8 Sep 2016, Fenghua Yu wrote:
> From: Fenghua Yu <fenghua.yu@...el.com>
> 
> We introduce a new resctrl file system mounted under /sys/fs/resctrl.
> User uses this file system to control resource allocation.
> 
> Hiearchy of the file system is as follows:
> /sys/fs/resctrl/info/info
> 		    /<resource0>/<resource0 specific info files>
> 		    /<resource1>/<resource1 specific info files>
> 			....
> 		/tasks
> 		/cpus
> 		/schemata
> 		/sub-dir1
> 		/sub-dir2
> 		....
> 
> User can specify which task uses which schemata for resource allocation.
> 
> More details can be found in Documentation/x86/intel_rdt_ui.txt
> 
> Signed-off-by: Fenghua Yu <fenghua.yu@...el.com>
> Reviewed-by: Tony Luck <tony.luck@...el.com>
> ---
>  arch/x86/include/asm/intel_rdt.h | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/arch/x86/include/asm/intel_rdt.h b/arch/x86/include/asm/intel_rdt.h
> index 85beecc..aaed4b4 100644
> --- a/arch/x86/include/asm/intel_rdt.h
> +++ b/arch/x86/include/asm/intel_rdt.h
> @@ -40,6 +40,8 @@ struct cache_domain {
>  	unsigned int shared_cache_id[MAX_CACHE_DOMAINS];
>  };
>  
> +extern struct cache_domain cache_domains[MAX_CACHE_LEAVES];
> +

This patch split is so annoying it's not even funny anymore.