linux-kernel - Re: [PATCH v12 07/13] x86/sgx: data structures for tracking available EPC pages

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20180704173448.GJ6724@linux.intel.com>
Date:   Wed, 4 Jul 2018 20:34:48 +0300
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Dave Hansen <dave.hansen@...el.com>
Cc:     x86@...nel.org, platform-driver-x86@...r.kernel.org,
        sean.j.christopherson@...el.com, nhorman@...hat.com,
        npmccallum@...hat.com, linux-sgx@...r.kernel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        "open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)" 
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v12 07/13] x86/sgx: data structures for tracking
 available EPC pages

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