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Date:   Thu, 23 Sep 2021 16:25:08 -0400
From:   Felix Kuehling <>
To:     Linux MM <>,,,
        Maling list - DRI developers 
        "" <>
Cc:     Christoph Hellwig <>, Jason Gunthorpe <>,
        Jerome Glisse <>,
        Ralph Campbell <>,
        Theodore Ts'o <>,
        Andrew Morton <>,
        Mel Gorman <>,
        Peter Zijlstra <>,
        "Phillips, Daniel" <>,
        "Sierra Guiza, Alejandro (Alex)" <>,
        Daniel Stone <>
Subject: Re: BoF at LPC: Documenting the Heterogeneous Memory Model

Change of plan: Instead of a BoF, this is now a session in the 
"GPU/media/AI buffer management and interop MC" micro conference. Thank 
you Daniel Stone for making that happen.

It is scheduled for tomorrow (Friday) 08:40-10:00 Pacific, 11:40-13:00 
Eastern, 15:40-17:00 UTC.

I hope to see you all tomorrow,

On 2021-09-21 3:19 p.m., Felix Kuehling wrote:
> As the programming models for GPU-based high-performance computing 
> applications are evolving, HMM is helping us integrate the GPU memory 
> management more closely with the kernel's virtual memory management. 
> As a result we can provide a shared virtual address space with 
> demand-paging and page-based migrations of anonymous pages to/from 
> device memory. A patch series by AMD [1, 2] to add support for 
> cache-coherent, CPU-accessible device memory has brought up some 
> fairly fundamental questions about HMM and its interaction with 
> virtual memory management, page cache and file systems. We'd like to 
> use the chance of getting together for a BoF [3] at LPC to raise 
> awareness for HMM outside the GPU driver code, identify gaps in the 
> architectural documentation and clarify our priorities for future 
> development.
> Thank you, Daniel, for suggesting the BoF and getting it scheduled. 
> It's set for Friday, 10am Pacific, 1pm Eastern, 5pm UTC.
> I am registered at LPC. Daniel got a speaker's pass. We're still 
> trying to work something out for Alex.
> I hope to see many of you on Friday.
> Best regards,
>   Felix
> [1]
> [2]
> [3]

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