From: John Hubbard <jhubbard@nvidia.com>
To: Alistair Popple <apopple@nvidia.com>,
Linux MM <linux-mm@kvack.org>,
Nouveau Dev <nouveau@lists.freedesktop.org>,
Ben Skeggs <bskeggs@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
Linux Doc Mailing List <linux-doc@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
<kvm-ppc@vger.kernel.org>,
dri-devel <dri-devel@lists.freedesktop.org>,
Ralph Campbell <rcampbell@nvidia.com>,
Jerome Glisse <jglisse@redhat.com>,
Jason Gunthorpe <jgg@ziepe.ca>
Subject: Re: [Nouveau] [PATCH 0/9] Add support for SVM atomics in Nouveau
Date: Wed, 10 Feb 2021 18:26:15 -0800 [thread overview]
Message-ID: <2906f445-babb-5f4e-2d99-dc004ae1face@nvidia.com> (raw)
In-Reply-To: <YCPYtNeYCuu6i2/d@phenom.ffwll.local>
On 2/10/21 4:59 AM, Daniel Vetter wrote:
...
>> GPU atomic operations to sysmem are hard to categorize, because because application
>> programmers could easily write programs that do a long series of atomic operations.
>> Such a program would be a little weird, but it's hard to rule out.
>
> Yeah, but we can forcefully break this whenever we feel like by revoking
> the page, moving it, and then reinstating the gpu pte again and let it
> continue.
Oh yes, that's true.
>
> If that's no possible then what we need here instead is an mlock() type of
> thing I think.
No need for that, then.
thanks,
--
John Hubbard
NVIDIA
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next prev parent reply other threads:[~2021-02-11 2:26 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-09 1:07 [Nouveau] [PATCH 0/9] Add support for SVM atomics in Nouveau Alistair Popple
2021-02-09 1:07 ` [Nouveau] [PATCH 1/9] mm/migrate.c: Always allow device private pages to migrate Alistair Popple
2021-02-09 13:39 ` Jason Gunthorpe
2021-02-10 3:40 ` Alistair Popple
2021-02-10 12:56 ` Jason Gunthorpe
2021-02-09 1:07 ` [Nouveau] [PATCH 2/9] mm/migrate.c: Allow pfn flags to be passed to migrate_vma_setup() Alistair Popple
2021-02-09 1:07 ` [Nouveau] [PATCH 3/9] mm/migrate: Add a unmap and pin migration mode Alistair Popple
2021-02-09 1:07 ` [Nouveau] [PATCH 4/9] Documentation: Add unmap and pin to HMM Alistair Popple
2021-02-09 1:07 ` [Nouveau] [PATCH 5/9] hmm-tests: Add test for unmap and pin Alistair Popple
2021-02-09 1:07 ` [Nouveau] [PATCH 6/9] nouveau/dmem: Only map migrating pages Alistair Popple
2021-02-09 1:07 ` [Nouveau] [PATCH 7/9] nouveau/svm: Refactor nouveau_range_fault Alistair Popple
2021-02-09 1:07 ` [Nouveau] [PATCH 8/9] nouveau/dmem: Add support for multiple page types Alistair Popple
2021-02-09 1:07 ` [Nouveau] [PATCH 9/9] nouveau/svm: Implement atomic SVM access Alistair Popple
2021-02-09 10:27 ` [Nouveau] [PATCH 0/9] Add support for SVM atomics in Nouveau Daniel Vetter
2021-02-09 12:57 ` Alistair Popple
2021-02-09 13:35 ` Jason Gunthorpe
2021-02-09 13:39 ` Daniel Vetter
2021-02-09 13:44 ` Jason Gunthorpe
2021-02-09 21:17 ` Jerome Glisse
2021-02-10 17:56 ` Jason Gunthorpe
2021-02-09 13:37 ` Daniel Vetter
2021-02-09 20:53 ` John Hubbard
2021-02-10 12:59 ` Daniel Vetter
2021-02-11 2:26 ` John Hubbard [this message]
2021-02-10 17:59 ` Jason Gunthorpe
2021-02-11 7:55 ` Christoph Hellwig
2021-02-17 23:00 ` Alistair Popple
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