Re: [PATCH v5 1/2] mm/mmu_notifier: make interval notifier updates safe

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To: Ralph Campbell <rcampbell@xxxxxxxxxx>
Subject: Re: [PATCH v5 1/2] mm/mmu_notifier: make interval notifier updates safe
From: Jason Gunthorpe <jgg@xxxxxxxxxxxx>
Date: Tue, 14 Jan 2020 12:45:26 +0000
Accept-language: en-US
Cc: "linux-rdma@xxxxxxxxxxxxxxx" <linux-rdma@xxxxxxxxxxxxxxx>, "linux-mm@xxxxxxxxx" <linux-mm@xxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, "linux-kselftest@xxxxxxxxxxxxxxx" <linux-kselftest@xxxxxxxxxxxxxxx>, Jerome Glisse <jglisse@xxxxxxxxxx>, John Hubbard <jhubbard@xxxxxxxxxx>, Christoph Hellwig <hch@xxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Shuah Khan <shuah@xxxxxxxxxx>
In-reply-to: <633a3dda-d4d7-1233-b290-53d36fb8fda1@nvidia.com>
Thread-index: AQHVtEsczeksfKC51EmFDx7aa5U3hKfi4tSAgAAlPICAABeZAIAGPeMAgADq14A=
Thread-topic: [PATCH v5 1/2] mm/mmu_notifier: make interval notifier updates safe

On Mon, Jan 13, 2020 at 02:44:52PM -0800, Ralph Campbell wrote:

> I'm using the device driver lock to serialize find/insert/update/remove
> changes to the interval tree.

The device driver lock can't really fully serialize this as it doesn't
effect how the intersection lookup runs.

Jason

Follow-Ups:
- Re: [PATCH v5 1/2] mm/mmu_notifier: make interval notifier updates safe
  - From: Ralph Campbell

References:
- [PATCH v5 0/2] mm/hmm/test: add self tests for HMM
  - From: Ralph Campbell
- [PATCH v5 1/2] mm/mmu_notifier: make interval notifier updates safe
  - From: Ralph Campbell
- Re: [PATCH v5 1/2] mm/mmu_notifier: make interval notifier updates safe
  - From: Jason Gunthorpe
- Re: [PATCH v5 1/2] mm/mmu_notifier: make interval notifier updates safe
  - From: Ralph Campbell
- Re: [PATCH v5 1/2] mm/mmu_notifier: make interval notifier updates safe
  - From: Jason Gunthorpe
- Re: [PATCH v5 1/2] mm/mmu_notifier: make interval notifier updates safe
  - From: Ralph Campbell

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