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From: Christoph Hellwig <hch@infradead.org>
To: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Ralph Campbell <rcampbell@nvidia.com>,
	Linux Doc Mailing List <linux-doc@vger.kernel.org>,
	Nouveau Dev <nouveau@lists.freedesktop.org>,
	dri-devel <dri-devel@lists.freedesktop.org>,
	Alistair Popple <apopple@nvidia.com>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	kvm-ppc@vger.kernel.org, Linux MM <linux-mm@kvack.org>,
	Ben Skeggs <bskeggs@redhat.com>, Daniel Vetter <daniel@ffwll.ch>,
	Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [Nouveau] [PATCH 0/9] Add support for SVM atomics in Nouveau
Date: Thu, 11 Feb 2021 07:55:10 +0000
Message-ID: <20210211075510.GA2368090@infradead.org> (raw)
In-Reply-To: <20210210175913.GO4718@ziepe.ca>

On Wed, Feb 10, 2021 at 01:59:13PM -0400, Jason Gunthorpe wrote:
> Really what you want to do here is leave the CPU page in the VMA and
> the page tables where it started and deny CPU access to the page. Then
> all the proper machinery will continue to work.
> 
> IMHO "migration" is the wrong idea if the data isn't actually moving.

Agreed.
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Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-09  1:07 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
2021-02-10 17:59         ` Jason Gunthorpe
2021-02-11  7:55           ` Christoph Hellwig [this message]
2021-02-17 23:00             ` Alistair Popple

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