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From: Dan Williams <dan.j.williams@intel.com>
To: Jerome Glisse <jglisse@redhat.com>
Cc: "Andrew Morton" <akpm@linux-foundation.org>,
	"Linux MM" <linux-mm@kvack.org>,
	"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
	"Felix Kuehling" <Felix.Kuehling@amd.com>,
	"Christian König" <christian.koenig@amd.com>,
	"Ralph Campbell" <rcampbell@nvidia.com>,
	"John Hubbard" <jhubbard@nvidia.com>,
	"Jason Gunthorpe" <jgg@mellanox.com>
Subject: Re: [PATCH 00/10] HMM updates for 5.1
Date: Mon, 18 Mar 2019 11:30:15 -0700	[thread overview]
Message-ID: <CAPcyv4geu34vgZszALiDxJWR8itK+A3qSmpR+_jOq29whGngNg@mail.gmail.com> (raw)
In-Reply-To: <20190318170404.GA6786@redhat.com>

On Mon, Mar 18, 2019 at 10:04 AM Jerome Glisse <jglisse@redhat.com> wrote:
>
> On Wed, Mar 13, 2019 at 09:10:04AM -0700, Andrew Morton wrote:
> > On Tue, 12 Mar 2019 21:27:06 -0400 Jerome Glisse <jglisse@redhat.com> wrote:
> >
> > > Andrew you will not be pushing this patchset in 5.1 ?
> >
> > I'd like to.  It sounds like we're converging on a plan.
> >
> > It would be good to hear more from the driver developers who will be
> > consuming these new features - links to patchsets, review feedback,
> > etc.  Which individuals should we be asking?  Felix, Christian and
> > Jason, perhaps?
> >
>
> So i am guessing you will not send this to Linus ? Should i repost ?
> This patchset has 2 sides, first side is just reworking the HMM API
> to make something better in respect to process lifetime. AMD folks
> did find that helpful [1]. This rework is also necessary to ease up
> the convertion of ODP to HMM [2] and Jason already said that he is
> interested in seing that happening [3]. By missing 5.1 it means now
> that i can not push ODP to HMM in 5.2 and it will be postpone to 5.3
> which is also postoning other work ...
>
> The second side is it adds 2 new helper dma map and dma unmap both
> are gonna be use by ODP and latter by nouveau (after some other
> nouveau changes are done). This new functions just do dma_map ie:
>     hmm_dma_map() {
>         existing_hmm_api()
>         for_each_page() {
>             dma_map_page()
>         }
>     }
>
> Do you want to see anymore justification than that ?

Yes, why does hmm needs its own dma mapping apis? It seems to
perpetuate the perception that hmm is something bolted onto the side
of the core-mm rather than a native capability.

  reply	other threads:[~2019-03-18 18:30 UTC|newest]

Thread overview: 115+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-29 16:54 [PATCH 00/10] HMM updates for 5.1 jglisse
2019-01-29 16:54 ` [PATCH 01/10] mm/hmm: use reference counting for HMM struct jglisse
2019-02-20 23:47   ` John Hubbard
2019-02-20 23:59     ` Jerome Glisse
2019-02-21  0:06       ` John Hubbard
2019-02-21  0:15         ` Jerome Glisse
2019-02-21  0:32           ` John Hubbard
2019-02-21  0:37             ` Jerome Glisse
2019-02-21  0:42               ` John Hubbard
2019-01-29 16:54 ` [PATCH 02/10] mm/hmm: do not erase snapshot when a range is invalidated jglisse
2019-02-20 23:58   ` John Hubbard
2019-01-29 16:54 ` [PATCH 03/10] mm/hmm: improve and rename hmm_vma_get_pfns() to hmm_range_snapshot() jglisse
2019-02-21  0:25   ` John Hubbard
2019-02-21  0:28     ` Jerome Glisse
2019-01-29 16:54 ` [PATCH 04/10] mm/hmm: improve and rename hmm_vma_fault() to hmm_range_fault() jglisse
2019-01-29 16:54 ` [PATCH 05/10] mm/hmm: improve driver API to work and wait over a range jglisse
2019-01-29 16:54 ` [PATCH 06/10] mm/hmm: add default fault flags to avoid the need to pre-fill pfns arrays jglisse
2019-01-29 16:54 ` [PATCH 07/10] mm/hmm: add an helper function that fault pages and map them to a device jglisse
2019-03-18 20:21   ` Dan Williams
2019-03-18 20:21     ` Dan Williams
2019-03-18 20:41     ` Jerome Glisse
2019-03-18 21:30       ` Dan Williams
2019-03-18 21:30         ` Dan Williams
2019-03-18 22:15         ` Jerome Glisse
2019-03-19  3:29           ` Dan Williams
2019-03-19  3:29             ` Dan Williams
2019-03-19 13:30             ` Jerome Glisse
2019-03-19  8:44               ` Ira Weiny
2019-03-19 17:10                 ` Jerome Glisse
2019-03-19 14:10                   ` Ira Weiny
2019-01-29 16:54 ` [PATCH 08/10] mm/hmm: support hugetlbfs (snap shoting, faulting and DMA mapping) jglisse
2019-01-29 16:54 ` [PATCH 09/10] mm/hmm: allow to mirror vma of a file on a DAX backed filesystem jglisse
2019-01-29 18:41   ` Dan Williams
2019-01-29 18:41     ` Dan Williams
2019-01-29 19:31     ` Jerome Glisse
2019-01-29 20:51       ` Dan Williams
2019-01-29 20:51         ` Dan Williams
2019-01-29 21:21         ` Jerome Glisse
2019-01-30  2:32           ` Dan Williams
2019-01-30  2:32             ` Dan Williams
2019-01-30  3:03             ` Jerome Glisse
2019-01-30 17:25               ` Dan Williams
2019-01-30 17:25                 ` Dan Williams
2019-01-30 18:36                 ` Jerome Glisse
2019-01-31  3:28                   ` Dan Williams
2019-01-31  3:28                     ` Dan Williams
2019-01-31  4:16                     ` Jerome Glisse
2019-01-31  5:44                       ` Dan Williams
2019-01-31  5:44                         ` Dan Williams
2019-03-05 22:16                         ` Andrew Morton
2019-03-06  4:20                           ` Dan Williams
2019-03-06  4:20                             ` Dan Williams
2019-03-06 15:51                             ` Jerome Glisse
2019-03-06 15:57                               ` Dan Williams
2019-03-06 15:57                                 ` Dan Williams
2019-03-06 16:03                                 ` Jerome Glisse
2019-03-06 16:06                                   ` Dan Williams
2019-03-06 16:06                                     ` Dan Williams
2019-03-07 17:46                             ` Andrew Morton
2019-03-07 18:56                               ` Jerome Glisse
2019-03-12  3:13                                 ` Dan Williams
2019-03-12  3:13                                   ` Dan Williams
2019-03-12 15:25                                   ` Jerome Glisse
2019-03-12 16:06                                     ` Dan Williams
2019-03-12 16:06                                       ` Dan Williams
2019-03-12 19:06                                       ` Jerome Glisse
2019-03-12 19:30                                         ` Dan Williams
2019-03-12 19:30                                           ` Dan Williams
2019-03-12 20:34                                           ` Dave Chinner
2019-03-13  1:06                                             ` Dan Williams
2019-03-13  1:06                                               ` Dan Williams
2019-03-12 21:52                                           ` Andrew Morton
2019-03-13  0:10                                             ` Jerome Glisse
2019-03-13  0:46                                               ` Dan Williams
2019-03-13  0:46                                                 ` Dan Williams
2019-03-13  1:00                                                 ` Jerome Glisse
2019-03-13 16:06                                               ` Andrew Morton
2019-03-13 18:39                                                 ` Jerome Glisse
2019-03-06 15:49                           ` Jerome Glisse
2019-03-06 22:18                             ` Andrew Morton
2019-03-07  0:36                               ` Jerome Glisse
2019-01-29 16:54 ` [PATCH 10/10] mm/hmm: add helpers for driver to safely take the mmap_sem jglisse
2019-02-20 21:59   ` John Hubbard
2019-02-20 22:19     ` Jerome Glisse
2019-02-20 22:40       ` John Hubbard
2019-02-20 23:09         ` Jerome Glisse
2019-02-20 23:17 ` [PATCH 00/10] HMM updates for 5.1 John Hubbard
2019-02-20 23:36   ` Jerome Glisse
2019-02-22 23:31 ` Ralph Campbell
2019-03-13  1:27 ` Jerome Glisse
2019-03-13 16:10   ` Andrew Morton
2019-03-13 18:01     ` Jason Gunthorpe
2019-03-13 18:33     ` Jerome Glisse
2019-03-18 17:00     ` Kuehling, Felix
2019-03-18 17:04     ` Jerome Glisse
2019-03-18 18:30       ` Dan Williams [this message]
2019-03-18 18:54         ` Jerome Glisse
2019-03-18 19:18           ` Dan Williams
2019-03-18 19:28             ` Jerome Glisse
2019-03-18 19:36               ` Dan Williams
2019-03-19 16:40       ` Andrew Morton
2019-03-19 16:58         ` Jerome Glisse
2019-03-19 17:12           ` Andrew Morton
2019-03-19 17:18             ` Jerome Glisse
2019-03-19 17:33               ` Dan Williams
2019-03-19 17:45                 ` Jerome Glisse
2019-03-19 18:42                   ` Dan Williams
2019-03-19 19:05                     ` Jerome Glisse
2019-03-19 19:13                       ` Dan Williams
2019-03-19 14:18                         ` Ira Weiny
2019-03-19 22:24                           ` Jerome Glisse
2019-03-19 19:18                         ` Jerome Glisse
2019-03-19 20:25                           ` Jerome Glisse
2019-03-19 21:51             ` Stephen Rothwell
2019-03-19 18:51           ` Deucher, Alexander

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