linux-kernel - Re: [PATCH RESEND 0/4] memory tiering: calculate abstract distance based on ACPI HMAT

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Message-ID: <87il9mccxi.fsf@yhuang6-desk2.ccr.corp.intel.com>
Date:   Fri, 11 Aug 2023 14:26:17 +0800
From:   "Huang, Ying" <ying.huang@...el.com>
To:     Bharata B Rao <bharata@....com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Alistair Popple <apopple@...dia.com>, <linux-mm@...ck.org>,
        <linux-kernel@...r.kernel.org>, <linux-cxl@...r.kernel.org>,
        <nvdimm@...ts.linux.dev>, <linux-acpi@...r.kernel.org>,
        "Aneesh Kumar K . V" <aneesh.kumar@...ux.ibm.com>,
        Wei Xu <weixugc@...gle.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Dave Hansen <dave.hansen@...el.com>,
        "Davidlohr Bueso" <dave@...olabs.net>,
        Johannes Weiner <hannes@...xchg.org>,
        "Jonathan Cameron" <Jonathan.Cameron@...wei.com>,
        Michal Hocko <mhocko@...nel.org>,
        Yang Shi <shy828301@...il.com>,
        Rafael J Wysocki <rafael.j.wysocki@...el.com>
Subject: Re: [PATCH RESEND 0/4] memory tiering: calculate abstract distance
 based on ACPI HMAT

Hi, Rao,

Bharata B Rao <bharata@....com> writes:

> On 24-Jul-23 11:28 PM, Andrew Morton wrote:
>> On Fri, 21 Jul 2023 14:15:31 +1000 Alistair Popple <apopple@...dia.com> wrote:
>> 
>>> Thanks for this Huang, I had been hoping to take a look at it this week
>>> but have run out of time. I'm keen to do some testing with it as well.
>> 
>> Thanks.  I'll queue this in mm-unstable for some testing.  Detailed
>> review and testing would be appreciated.
>
> I gave this series a try on a 2P system with 2 CXL cards. I don't trust the
> bandwidth and latency numbers reported by HMAT here, but FWIW, this patchset
> puts the CXL nodes on a lower tier than DRAM nodes.

Thank you very much!

Can I add your "Tested-by" for the series?

--
Best Regards,
Huang, Ying