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] https://patchwork.freedesktop.org/series/94611/ [2] https://patchwork.freedesktop.org/series/90706/ [3] https://linuxplumbersconf.org/event/11/contributions/1123/
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. https://linuxplumbersconf.org/event/11/contributions/1112/
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, Felix
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] https://patchwork.freedesktop.org/series/94611/ [2] https://patchwork.freedesktop.org/series/90706/ [3] https://linuxplumbersconf.org/event/11/contributions/1123/
On Thu, Sep 23, 2021 at 04:25:08PM -0400, Felix Kuehling wrote:
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. https://linuxplumbersconf.org/event/11/contributions/1112/
It is scheduled for tomorrow (Friday) 08:40-10:00 Pacific, 11:40-13:00 Eastern, 15:40-17:00 UTC.
That's up against:
Direct map management Vlastimil Babka, Mike Rapoport, Rick Edgecombe 11:30-12:15.
Seems like a lot of the same people would want to be in both sessions. Maybe one could be moved?
[AMD Official Use Only]
Hi Matt,
I originally picked the 10 am pdt time slot to avoid those conflicts. But I see the overlap is only partial. I also see Peterz is giving a talk that also overlaps partially. But I think this is survivable. I suggest we just try to make this work as best we can. It's not a presentation, it's primarily intended as a meet and greet and discussion. Whatever starts there will continue on lkml and etc.
Regards, Daniel
-----Original Message----- From: Matthew Wilcox willy@infradead.org Sent: Thursday, September 23, 2021 1:39 PM To: Kuehling, Felix Felix.Kuehling@amd.com Cc: Linux MM linux-mm@kvack.org; linux-ext4@vger.kernel.org; linux-xfs@vger.kernel.org; Maling list - DRI developers dri-devel@lists.freedesktop.org; linux-kernel@vger.kernel.org; Christoph Hellwig hch@lst.de; Jason Gunthorpe jgg@mellanox.com; Jerome Glisse jglisse@redhat.com; Ralph Campbell rcampbell@nvidia.com; Theodore Ts'o tytso@mit.edu; Andrew Morton akpm@linux-foundation.org; Mel Gorman mgorman@techsingularity.net; Peter Zijlstra peterz@infradead.org; Phillips, Daniel Daniel.Phillips@amd.com; Sierra Guiza, Alejandro (Alex) Alex.Sierra@amd.com; Daniel Stone daniel@fooishbar.org Subject: Re: BoF at LPC: Documenting the Heterogeneous Memory Model Architecture
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On Thu, Sep 23, 2021 at 04:25:08PM -0400, Felix Kuehling wrote:
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. https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Flinu xplumbersconf.org%2Fevent%2F11%2Fcontributions%2F1112%2F&data=04%7 C01%7CDaniel.Phillips%40amd.com%7Cb5064a1c5649431a90be08d97ed2517b%7C3 dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637680264672385094%7CUnknown %7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJ XVCI6Mn0%3D%7C2000&sdata=e%2Bpn4vXZI9yhLAbB8rtqik6OiZsEwOCBMdqk4JZ n%2FC8%3D&reserved=0
It is scheduled for tomorrow (Friday) 08:40-10:00 Pacific, 11:40-13:00 Eastern, 15:40-17:00 UTC.
That's up against:
Direct map management Vlastimil Babka, Mike Rapoport, Rick Edgecombe 11:30-12:15.
Seems like a lot of the same people would want to be in both sessions. Maybe one could be moved?
Hi,
On Thu, 23 Sept 2021 at 21:40, Matthew Wilcox willy@infradead.org wrote:
On Thu, Sep 23, 2021 at 04:25:08PM -0400, Felix Kuehling wrote:
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. https://linuxplumbersconf.org/event/11/contributions/1112/
It is scheduled for tomorrow (Friday) 08:40-10:00 Pacific, 11:40-13:00 Eastern, 15:40-17:00 UTC.
That's up against:
Direct map management Vlastimil Babka, Mike Rapoport, Rick Edgecombe 11:30-12:15.
Seems like a lot of the same people would want to be in both sessions. Maybe one could be moved?
Good point, and thanks, but it's hard to keep the longer slot whilst moving it later; I wonder if we could move direct map management to the final slot?
Cheers, Daniel
dri-devel@lists.freedesktop.org
-
Daniel Stone -
Felix Kuehling -
Matthew Wilcox -
Phillips, Daniel