From: Jason Gunthorpe <jgg@ziepe.ca>
To: Ralph Campbell <rcampbell@nvidia.com>
Cc: "Andrea Arcangeli" <aarcange@redhat.com>,
"David (ChunMing) Zhou" <David1.Zhou@amd.com>,
"Dimitri Sivanich" <sivanich@sgi.com>,
"Gavin Shan" <shangw@linux.vnet.ibm.com>,
"Andrea Righi" <andrea@betterlinux.com>,
linux-rdma@vger.kernel.org, "John Hubbard" <jhubbard@nvidia.com>,
"Kuehling, Felix" <Felix.Kuehling@amd.com>,
linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
"Christian König" <christian.koenig@amd.com>,
linux-mm@kvack.org, "Jérôme Glisse" <jglisse@redhat.com>,
iommu@lists.linux-foundation.org, amd-gfx@lists.freedesktop.org,
"Alex Deucher" <alexander.deucher@amd.com>,
intel-gfx@lists.freedesktop.org, "Christoph Hellwig" <hch@lst.de>
Subject: Re: [PATCH v3 hmm 03/11] mm/mmu_notifiers: add a get/put scheme for the registration
Date: Wed, 14 Aug 2019 21:13:19 -0300 [thread overview]
Message-ID: <20190815001319.GF11200@ziepe.ca> (raw)
In-Reply-To: <0a23adb8-b827-cd90-503e-bfa84166c67e@nvidia.com>
On Wed, Aug 14, 2019 at 02:20:31PM -0700, Ralph Campbell wrote:
>
> On 8/6/19 4:15 PM, Jason Gunthorpe wrote:
> > From: Jason Gunthorpe <jgg@mellanox.com>
> >
> > Many places in the kernel have a flow where userspace will create some
> > object and that object will need to connect to the subsystem's
> > mmu_notifier subscription for the duration of its lifetime.
> >
> > In this case the subsystem is usually tracking multiple mm_structs and it
> > is difficult to keep track of what struct mmu_notifier's have been
> > allocated for what mm's.
> >
> > Since this has been open coded in a variety of exciting ways, provide core
> > functionality to do this safely.
> >
> > This approach uses the strct mmu_notifier_ops * as a key to determine if
>
> s/strct/struct
Yes, thanks for all of this, I like having comments, but I'm a
terrible proofreader :(
Jason
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next prev parent reply other threads:[~2019-08-15 0:13 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-06 23:15 [PATCH v3 hmm 00/11] Add mmu_notifier_get/put for managing mmu notifier registrations Jason Gunthorpe
2019-08-06 23:15 ` [PATCH v3 hmm 01/11] mm/mmu_notifiers: hoist do_mmu_notifier_register down_write to the caller Jason Gunthorpe
2019-08-08 10:24 ` Christoph Hellwig
2019-08-14 20:14 ` Ralph Campbell
2019-08-06 23:15 ` [PATCH v3 hmm 02/11] mm/mmu_notifiers: do not speculatively allocate a mmu_notifier_mm Jason Gunthorpe
2019-08-08 10:26 ` Christoph Hellwig
2019-08-14 20:32 ` Ralph Campbell
2019-08-06 23:15 ` [PATCH v3 hmm 03/11] mm/mmu_notifiers: add a get/put scheme for the registration Jason Gunthorpe
2019-08-14 21:20 ` Ralph Campbell
2019-08-15 0:13 ` Jason Gunthorpe [this message]
2019-08-06 23:15 ` [PATCH v3 hmm 04/11] misc/sgi-gru: use mmu_notifier_get/put for struct gru_mm_struct Jason Gunthorpe
2019-08-08 10:25 ` Christoph Hellwig
2019-08-14 15:58 ` Jason Gunthorpe
2019-08-14 17:18 ` Dimitri Sivanich
2019-08-06 23:15 ` [PATCH v3 hmm 05/11] hmm: use mmu_notifier_get/put for 'struct hmm' Jason Gunthorpe
2019-08-08 10:28 ` Christoph Hellwig
2019-08-14 21:51 ` Ralph Campbell
2019-08-06 23:15 ` [PATCH v3 hmm 06/11] RDMA/odp: use mmu_notifier_get/put for 'struct ib_ucontext_per_mm' Jason Gunthorpe
2019-08-06 23:15 ` [PATCH v3 hmm 07/11] RDMA/odp: remove ib_ucontext from ib_umem Jason Gunthorpe
2019-08-06 23:15 ` [PATCH v3 hmm 08/11] drm/radeon: use mmu_notifier_get/put for struct radeon_mn Jason Gunthorpe
2019-08-14 16:07 ` Jason Gunthorpe
2019-08-15 8:28 ` Christian König
2019-08-15 19:46 ` Jason Gunthorpe
2019-08-06 23:15 ` [PATCH v3 hmm 09/11] drm/amdkfd: fix a use after free race with mmu_notifer unregister Jason Gunthorpe
2019-08-06 23:15 ` [PATCH v3 hmm 10/11] drm/amdkfd: use mmu_notifier_put Jason Gunthorpe
2019-08-06 23:47 ` Kuehling, Felix
2019-08-07 11:42 ` Jason Gunthorpe
2019-08-06 23:15 ` [PATCH v3 hmm 11/11] mm/mmu_notifiers: remove unregister_no_release Jason Gunthorpe
2019-08-08 10:29 ` Christoph Hellwig
2019-08-14 21:53 ` Ralph Campbell
2019-08-14 23:56 ` [PATCH v3 hmm 00/11] Add mmu_notifier_get/put for managing mmu notifier registrations Ralph Campbell
2019-08-16 15:14 ` Jason Gunthorpe
2019-08-21 19:53 ` Jason Gunthorpe
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