Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Date:   Wed, 4 Jul 2018 20:34:48 +0300
From:   Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
To:     Dave Hansen <dave.hansen@intel.com>
Cc:     x86@kernel.org, platform-driver-x86@vger.kernel.org,
        sean.j.christopherson@intel.com, nhorman@redhat.com,
        npmccallum@redhat.com, linux-sgx@vger.kernel.org,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>,
        "H. Peter Anvin" <hpa@zytor.com>,
        "open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)" 
        <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v12 07/13] x86/sgx: data structures for tracking
 available EPC pages
Message-ID: <20180704173448.GJ6724@linux.intel.com>
References: <20180703182118.15024-1-jarkko.sakkinen@linux.intel.com>
 <20180703182118.15024-8-jarkko.sakkinen@linux.intel.com>
 <48296e78-5979-a22f-c337-633deccf30bf@intel.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <48296e78-5979-a22f-c337-633deccf30bf@intel.com>
Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo
User-Agent: Mutt/1.9.4 (2018-02-28)
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On Tue, Jul 03, 2018 at 12:03:48PM -0700, Dave Hansen wrote:
> On 07/03/2018 11:19 AM, Jarkko Sakkinen wrote:
> > This commit adds a database of EPC banks for kernel to easily access the
> > available EPC pages. On UMA architectures there is a singe bank of EPC
> > pages. On NUMA architectures there is an EPC bank for each node.
> 
> Is this universally true?  What about Sub-NUMA-Clustering/Cluster-on-Die
> systems?

I have to say that I do not have a good answer right now but I will
study this area for the next version.

/Jarkko