From: Logan Gunthorpe <logang@deltatee.com>
To: Andi Kleen <ak@linux.intel.com>
Cc: Jerome Glisse <jglisse@redhat.com>,
Dan Williams <dan.j.williams@intel.com>,
Linux MM <linux-mm@kvack.org>,
Andrew Morton <akpm@linux-foundation.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Ross Zwisler <ross.zwisler@linux.intel.com>,
Dave Hansen <dave.hansen@intel.com>,
Haggai Eran <haggaie@mellanox.com>,
balbirs@au1.ibm.com,
"Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
"Kuehling, Felix" <felix.kuehling@amd.com>,
Philip.Yang@amd.com, "Koenig,
Christian" <christian.koenig@amd.com>,
"Blinzer, Paul" <Paul.Blinzer@amd.com>,
John Hubbard <jhubbard@nvidia.com>,
rcampbell@nvidia.com
Subject: Re: [RFC PATCH 02/14] mm/hms: heterogenenous memory system (HMS) documentation
Date: Tue, 4 Dec 2018 13:47:17 -0700 [thread overview]
Message-ID: <8ed92aba-a129-144f-34ab-f77102d54cfc@deltatee.com> (raw)
In-Reply-To: <20181204201432.GH18167@tassilo.jf.intel.com>
On 2018-12-04 1:14 p.m., Andi Kleen wrote:
>> Also, in the same vein, I think it's wrong to have the API enumerate all
>> the different memory available in the system. The API should simply
> We need an enumeration API too, just to display to the user what they
> have, and possibly for applications to size their buffers
> (all we do with existing NUMA nodes)
Yes, but I think my main concern is the conflation of the enumeration
API and the binding API. An application doesn't want to walk through all
the possible memory and types in the system just to get some memory that
will work with a couple initiators (which it somehow has to map to
actual resources, like fds). We also don't want userspace to police
itself on which memory works with which initiator.
Enumeration is definitely not the common use case. And if we create a
new enumeration API now, it may make it difficult or impossible to unify
these types of memory with the existing NUMA node hierarchies if/when
this gets more integrated with the mm core.
Logan
next prev parent reply other threads:[~2018-12-04 20:47 UTC|newest]
Thread overview: 171+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-03 23:34 [RFC PATCH 00/14] Heterogeneous Memory System (HMS) and hbind() jglisse
2018-12-03 23:34 ` jglisse
2018-12-03 23:34 ` [RFC PATCH 01/14] mm/hms: heterogeneous memory system (sysfs infrastructure) jglisse
2018-12-03 23:34 ` [RFC PATCH 02/14] mm/hms: heterogenenous memory system (HMS) documentation jglisse
2018-12-04 17:06 ` Andi Kleen
2018-12-04 17:06 ` Andi Kleen
2018-12-04 18:24 ` Jerome Glisse
2018-12-04 18:24 ` Jerome Glisse
2018-12-04 18:31 ` Dan Williams
2018-12-04 18:57 ` Jerome Glisse
2018-12-04 18:57 ` Jerome Glisse
2018-12-04 19:11 ` Logan Gunthorpe
2018-12-04 19:22 ` Jerome Glisse
2018-12-04 19:22 ` Jerome Glisse
2018-12-04 19:41 ` Logan Gunthorpe
2018-12-04 20:13 ` Jerome Glisse
2018-12-04 20:13 ` Jerome Glisse
2018-12-04 20:30 ` Logan Gunthorpe
2018-12-04 20:59 ` Jerome Glisse
2018-12-04 20:59 ` Jerome Glisse
2018-12-04 21:19 ` Logan Gunthorpe
2018-12-04 21:51 ` Jerome Glisse
2018-12-04 21:51 ` Jerome Glisse
2018-12-04 22:16 ` Logan Gunthorpe
2018-12-04 23:56 ` Jerome Glisse
2018-12-04 23:56 ` Jerome Glisse
2018-12-05 1:15 ` Logan Gunthorpe
2018-12-05 2:31 ` Jerome Glisse
2018-12-05 2:31 ` Jerome Glisse
2018-12-05 17:41 ` Logan Gunthorpe
2018-12-05 18:07 ` Jerome Glisse
2018-12-05 18:07 ` Jerome Glisse
2018-12-05 18:20 ` Logan Gunthorpe
2018-12-05 18:33 ` Jerome Glisse
2018-12-05 18:33 ` Jerome Glisse
2018-12-05 18:48 ` Logan Gunthorpe
2018-12-05 18:55 ` Jerome Glisse
2018-12-05 18:55 ` Jerome Glisse
2018-12-05 19:10 ` Logan Gunthorpe
2018-12-05 22:58 ` Jerome Glisse
2018-12-05 22:58 ` Jerome Glisse
2018-12-05 23:09 ` Logan Gunthorpe
2018-12-05 23:20 ` Jerome Glisse
2018-12-05 23:20 ` Jerome Glisse
2018-12-05 23:23 ` Logan Gunthorpe
2018-12-05 23:27 ` Jerome Glisse
2018-12-06 0:08 ` Dan Williams
2018-12-05 2:34 ` Dan Williams
2018-12-05 2:37 ` Jerome Glisse
2018-12-05 2:37 ` Jerome Glisse
2018-12-05 17:25 ` Logan Gunthorpe
2018-12-05 18:01 ` Jerome Glisse
2018-12-05 18:01 ` Jerome Glisse
2018-12-04 20:14 ` Andi Kleen
2018-12-04 20:47 ` Logan Gunthorpe [this message]
2018-12-04 21:15 ` Jerome Glisse
2018-12-04 21:15 ` Jerome Glisse
2018-12-05 0:54 ` Kuehling, Felix
2018-12-04 19:19 ` Dan Williams
2018-12-04 19:32 ` Jerome Glisse
2018-12-04 19:32 ` Jerome Glisse
2018-12-04 20:12 ` Andi Kleen
2018-12-04 20:41 ` Jerome Glisse
2018-12-04 20:41 ` Jerome Glisse
2018-12-05 4:36 ` Aneesh Kumar K.V
2018-12-05 4:41 ` Jerome Glisse
2018-12-05 4:41 ` Jerome Glisse
2018-12-05 10:52 ` Mike Rapoport
2018-12-05 10:52 ` Mike Rapoport
2018-12-03 23:34 ` [RFC PATCH 03/14] mm/hms: add target memory to heterogeneous memory system infrastructure jglisse
2018-12-03 23:34 ` [RFC PATCH 04/14] mm/hms: add initiator " jglisse
2018-12-03 23:35 ` [RFC PATCH 05/14] mm/hms: add link " jglisse
2018-12-03 23:35 ` [RFC PATCH 06/14] mm/hms: add bridge " jglisse
2018-12-03 23:35 ` [RFC PATCH 07/14] mm/hms: register main memory with heterogenenous memory system jglisse
2018-12-03 23:35 ` [RFC PATCH 08/14] mm/hms: register main CPUs " jglisse
2018-12-03 23:35 ` [RFC PATCH 09/14] mm/hms: hbind() for heterogeneous memory system (aka mbind() for HMS) jglisse
2018-12-03 23:35 ` [RFC PATCH 10/14] mm/hbind: add heterogeneous memory policy tracking infrastructure jglisse
2018-12-03 23:35 ` [RFC PATCH 11/14] mm/hbind: add bind command to heterogeneous memory policy jglisse
2018-12-03 23:35 ` [RFC PATCH 12/14] mm/hbind: add migrate command to hbind() ioctl jglisse
2018-12-03 23:35 ` [RFC PATCH 13/14] drm/nouveau: register GPU under heterogeneous memory system jglisse
2018-12-03 23:35 ` [RFC PATCH 14/14] test/hms: tests for " jglisse
2018-12-04 7:44 ` [RFC PATCH 00/14] Heterogeneous Memory System (HMS) and hbind() Aneesh Kumar K.V
2018-12-04 7:44 ` Aneesh Kumar K.V
2018-12-04 14:44 ` Jerome Glisse
2018-12-04 14:44 ` Jerome Glisse
2018-12-04 14:44 ` Jerome Glisse
2018-12-04 18:02 ` Dave Hansen
2018-12-04 18:02 ` Dave Hansen
2018-12-04 18:49 ` Jerome Glisse
2018-12-04 18:49 ` Jerome Glisse
2018-12-04 18:49 ` Jerome Glisse
2018-12-04 18:54 ` Dave Hansen
2018-12-04 18:54 ` Dave Hansen
2018-12-04 19:11 ` Jerome Glisse
2018-12-04 19:11 ` Jerome Glisse
2018-12-04 19:11 ` Jerome Glisse
2018-12-04 21:37 ` Dave Hansen
2018-12-04 21:37 ` Dave Hansen
2018-12-04 21:57 ` Jerome Glisse
2018-12-04 21:57 ` Jerome Glisse
2018-12-04 21:57 ` Jerome Glisse
2018-12-04 23:58 ` Dave Hansen
2018-12-04 23:58 ` Dave Hansen
2018-12-05 0:29 ` Jerome Glisse
2018-12-05 0:29 ` Jerome Glisse
2018-12-05 0:29 ` Jerome Glisse
2018-12-05 1:22 ` Kuehling, Felix
2018-12-05 1:22 ` Kuehling, Felix
2018-12-05 1:22 ` Kuehling, Felix
2018-12-05 11:27 ` Aneesh Kumar K.V
2018-12-05 11:27 ` Aneesh Kumar K.V
2018-12-05 16:09 ` Jerome Glisse
2018-12-05 16:09 ` Jerome Glisse
2018-12-05 16:09 ` Jerome Glisse
2018-12-04 23:54 ` Dave Hansen
2018-12-04 23:54 ` Dave Hansen
2018-12-05 0:15 ` Jerome Glisse
2018-12-05 0:15 ` Jerome Glisse
2018-12-05 0:15 ` Jerome Glisse
2018-12-05 1:06 ` Dave Hansen
2018-12-05 1:06 ` Dave Hansen
2018-12-05 2:13 ` Jerome Glisse
2018-12-05 2:13 ` Jerome Glisse
2018-12-05 2:13 ` Jerome Glisse
2018-12-05 17:27 ` Dave Hansen
2018-12-05 17:27 ` Dave Hansen
2018-12-05 17:53 ` Jerome Glisse
2018-12-05 17:53 ` Jerome Glisse
2018-12-05 17:53 ` Jerome Glisse
2018-12-06 18:25 ` Dave Hansen
2018-12-06 18:25 ` Dave Hansen
2018-12-06 19:20 ` Jerome Glisse
2018-12-06 19:20 ` Jerome Glisse
2018-12-06 19:20 ` Jerome Glisse
2018-12-06 19:31 ` Dave Hansen
2018-12-06 19:31 ` Dave Hansen
2018-12-06 20:11 ` Logan Gunthorpe
2018-12-06 20:11 ` Logan Gunthorpe
2018-12-06 22:04 ` Dave Hansen
2018-12-06 22:04 ` Dave Hansen
2018-12-06 22:39 ` Jerome Glisse
2018-12-06 22:39 ` Jerome Glisse
2018-12-06 22:39 ` Jerome Glisse
2018-12-06 23:09 ` Dave Hansen
2018-12-06 23:09 ` Dave Hansen
2018-12-06 23:28 ` Logan Gunthorpe
2018-12-06 23:28 ` Logan Gunthorpe
2018-12-06 23:34 ` Dave Hansen
2018-12-06 23:34 ` Dave Hansen
2018-12-06 23:38 ` Dave Hansen
2018-12-06 23:38 ` Dave Hansen
2018-12-06 23:48 ` Logan Gunthorpe
2018-12-06 23:48 ` Logan Gunthorpe
2018-12-07 0:20 ` Jerome Glisse
2018-12-07 0:20 ` Jerome Glisse
2018-12-07 0:20 ` Jerome Glisse
2018-12-07 15:06 ` Jonathan Cameron
2018-12-07 15:06 ` Jonathan Cameron
2018-12-07 15:06 ` Jonathan Cameron
2018-12-07 19:37 ` Jerome Glisse
2018-12-07 19:37 ` Jerome Glisse
2018-12-07 19:37 ` Jerome Glisse
2018-12-07 0:15 ` Jerome Glisse
2018-12-07 0:15 ` Jerome Glisse
2018-12-07 0:15 ` Jerome Glisse
2018-12-06 20:27 ` Jerome Glisse
2018-12-06 20:27 ` Jerome Glisse
2018-12-06 20:27 ` Jerome Glisse
2018-12-06 21:46 ` Jerome Glisse
2018-12-06 21:46 ` Jerome Glisse
2018-12-06 21:46 ` Jerome Glisse
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