linux-kernel - Re: [PATCH v3 0/3] create sysfs representation of ACPI HMAT

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Message-ID: <20171221131805.GE4831@dhcp22.suse.cz>
Date:   Thu, 21 Dec 2017 14:18:05 +0100
From:   Michal Hocko <mhocko@...nel.org>
To:     Ross Zwisler <ross.zwisler@...ux.intel.com>
Cc:     linux-kernel@...r.kernel.org,
        "Anaczkowski, Lukasz" <lukasz.anaczkowski@...el.com>,
        "Box, David E" <david.e.box@...el.com>,
        "Kogut, Jaroslaw" <Jaroslaw.Kogut@...el.com>,
        "Koss, Marcin" <marcin.koss@...el.com>,
        "Koziej, Artur" <artur.koziej@...el.com>,
        "Lahtinen, Joonas" <joonas.lahtinen@...el.com>,
        "Moore, Robert" <robert.moore@...el.com>,
        "Nachimuthu, Murugasamy" <murugasamy.nachimuthu@...el.com>,
        "Odzioba, Lukasz" <lukasz.odzioba@...el.com>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        "Schmauss, Erik" <erik.schmauss@...el.com>,
        "Verma, Vishal L" <vishal.l.verma@...el.com>,
        "Zheng, Lv" <lv.zheng@...el.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Balbir Singh <bsingharora@...il.com>,
        Brice Goglin <brice.goglin@...il.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Dave Hansen <dave.hansen@...el.com>,
        Jerome Glisse <jglisse@...hat.com>,
        John Hubbard <jhubbard@...dia.com>,
        Len Brown <lenb@...nel.org>,
        Tim Chen <tim.c.chen@...ux.intel.com>, devel@...ica.org,
        linux-acpi@...r.kernel.org, linux-mm@...ck.org,
        linux-nvdimm@...ts.01.org, linux-api@...r.kernel.org
Subject: Re: [PATCH v3 0/3] create sysfs representation of ACPI HMAT

On Wed 20-12-17 09:41:07, Ross Zwisler wrote:
> On Mon, Dec 18, 2017 at 01:35:47PM -0700, Ross Zwisler wrote:
> > On Thu, Dec 14, 2017 at 02:00:32PM +0100, Michal Hocko wrote:
> <>
> > > What is the testing procedure? How can I setup qemu to simlate such HW?
> > 
> > Well, the QEMU table simulation is gross, so I'd rather not get everyone
> > testing with that.  Injecting custom HMAT and SRAT tables via initrd/initramfs
> > is a much better way:
> > 
> > https://www.kernel.org/doc/Documentation/acpi/initrd_table_override.txt
> > 
> > Dan recently posted a patch that lets this happen for the HMAT:
> > 
> > https://lists.01.org/pipermail/linux-nvdimm/2017-December/013545.html
> > 
> > I'm working right now on getting an easier way to generate HMAT tables - I'll
> > let you know when I have something working.
> 
> I've posted details on how to set up test configurations using injected HMAT
> and SRAT tables here:
> 
> https://github.com/rzwisler/hmat_examples
> 
> So far I've got two different sample configs, and we can add more as they are
> useful.  Having the sample configs in github is also nice because if someone
> finds a config that causes a kernel issue it can be reported then added to
> this list of example configs for future testing.
> 
> Please let me know if you have trouble getting this working.

Thanks a lot Ross, I will try this but things are getting pretty busy
here before the holiday so I won't be able to get to it and your other
email before new year. Sorry about that.

-- 
Michal Hocko
SUSE Labs