linux-kernel - Re: [PATCH hmm v2 0/5] Adjust hmm_range

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Date:   Wed, 6 May 2020 15:45:26 -0300
From:   Jason Gunthorpe <jgg@...pe.ca>
To:     linux-mm@...ck.org, Ralph Campbell <rcampbell@...dia.com>
Cc:     Alex Deucher <alexander.deucher@....com>,
        amd-gfx@...ts.freedesktop.org, Ben Skeggs <bskeggs@...hat.com>,
        Christian König <christian.koenig@....com>,
        "David (ChunMing) Zhou" <David1.Zhou@....com>,
        dri-devel@...ts.freedesktop.org,
        Felix Kuehling <Felix.Kuehling@....com>,
        Christoph Hellwig <hch@....de>,
        intel-gfx@...ts.freedesktop.org,
        Jérôme Glisse <jglisse@...hat.com>,
        John Hubbard <jhubbard@...dia.com>,
        linux-kernel@...r.kernel.org,
        Niranjana Vishwanathapura <niranjana.vishwanathapura@...el.com>,
        nouveau@...ts.freedesktop.org, "Yang, Philip" <Philip.Yang@....com>
Subject: Re: [PATCH hmm v2 0/5] Adjust hmm_range_fault() API

On Fri, May 01, 2020 at 03:20:43PM -0300, Jason Gunthorpe wrote:
> From: Jason Gunthorpe <jgg@...lanox.com>
> 
> The API is a bit complicated for the uses we actually have, and
> disucssions for simplifying have come up a number of times.
> 
> This small series removes the customizable pfn format and simplifies the
> return code of hmm_range_fault()
> 
> All the drivers are adjusted to process in the simplified format.
> I would appreciated tested-by's for the two drivers, thanks!
> 
> v2:
>  - Move call chain to commit message
>  - Fix typo of HMM_PFN_REQ_FAULT
>  - Move nouveau_hmm_convert_pfn() to nouveau_svm.c
>  - Add acks and tested-bys
> v1: https://lore.kernel.org/r/0-v1-4eb72686de3c+5062-hmm_no_flags_jgg@mellanox.com
> 
> Cc: Christoph Hellwig <hch@....de>
> Cc: John Hubbard <jhubbard@...dia.com>
> Cc: Jérôme Glisse <jglisse@...hat.com>
> Cc: Ben Skeggs <bskeggs@...hat.com>
> To: Ralph Campbell <rcampbell@...dia.com>
> Cc: nouveau@...ts.freedesktop.org
> Cc: Niranjana Vishwanathapura <niranjana.vishwanathapura@...el.com>
> Cc: intel-gfx@...ts.freedesktop.org
> Cc: "Kuehling, Felix" <Felix.Kuehling@....com>
> Cc: Alex Deucher <alexander.deucher@....com>
> Cc: "Christian König" <christian.koenig@....com>
> Cc: "David (ChunMing) Zhou" <David1.Zhou@....com>
> Cc: amd-gfx@...ts.freedesktop.org
> Cc: dri-devel@...ts.freedesktop.org
> Cc: linux-kernel@...r.kernel.org
> Cc: "Yang, Philip" <Philip.Yang@....com>
> To: linux-mm@...ck.org
> 
> Jason Gunthorpe (5):
>   mm/hmm: make CONFIG_DEVICE_PRIVATE into a select
>   mm/hmm: make hmm_range_fault return 0 or -1
>   drm/amdgpu: remove dead code after hmm_range_fault()
>   mm/hmm: remove HMM_PFN_SPECIAL
>   mm/hmm: remove the customizable pfn format from hmm_range_fault

Applied to hmm.git, thanks

Jason