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From: Christoph Hellwig <hch@lst.de>
To: Jerome Glisse <jglisse@redhat.com>
Cc: Dan Williams <dan.j.williams@intel.com>,
	Jason Gunthorpe <jgg@mellanox.com>,
	Christoph Hellwig <hch@lst.de>, Ben Skeggs <bskeggs@redhat.com>,
	Felix Kuehling <Felix.Kuehling@amd.com>,
	Ralph Campbell <rcampbell@nvidia.com>,
	"linux-mm@kvack.org" <linux-mm@kvack.org>,
	"nouveau@lists.freedesktop.org" <nouveau@lists.freedesktop.org>,
	"dri-devel@lists.freedesktop.org"
	<dri-devel@lists.freedesktop.org>,
	"amd-gfx@lists.freedesktop.org" <amd-gfx@lists.freedesktop.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 04/15] mm: remove the pgmap field from struct hmm_vma_walk
Date: Fri, 16 Aug 2019 06:41:37 +0200
Message-ID: <20190816044137.GA4093@lst.de> (raw)
In-Reply-To: <20190815203306.GB25517@redhat.com>

On Thu, Aug 15, 2019 at 04:33:06PM -0400, Jerome Glisse wrote:
> So nor HMM nor driver should dereference the struct page (i do not
> think any iommu driver would either),

Both current hmm drivers convert the hmm pfn back to a page and
eventually call dma_map_page on it.  As do the ODP patches from you.


  parent reply index

Thread overview: 56+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-06 16:05 hmm cleanups, v2 Christoph Hellwig
2019-08-06 16:05 ` [PATCH 01/15] amdgpu: remove -EAGAIN handling for hmm_range_fault Christoph Hellwig
2019-08-06 16:05 ` [PATCH 02/15] amdgpu: don't initialize range->list in amdgpu_hmm_init_range Christoph Hellwig
2019-08-06 16:05 ` [PATCH 03/15] nouveau: pass struct nouveau_svmm to nouveau_range_fault Christoph Hellwig
2019-08-06 18:02   ` Jason Gunthorpe
2019-08-06 16:05 ` [PATCH 04/15] mm: remove the pgmap field from struct hmm_vma_walk Christoph Hellwig
2019-08-07 17:45   ` Jason Gunthorpe
2019-08-07 18:47     ` Dan Williams
2019-08-08  6:59       ` Christoph Hellwig
2019-08-14  1:36         ` Dan Williams
2019-08-14  7:38           ` Christoph Hellwig
2019-08-14 13:27             ` Jason Gunthorpe
2019-08-14 14:48               ` Dan Williams
2019-08-15 18:03                 ` Jerome Glisse
2019-08-15 19:22                   ` Jason Gunthorpe
2019-08-15 19:36                   ` Dan Williams
2019-08-15 19:43                     ` Jerome Glisse
2019-08-15 20:12                       ` Dan Williams
2019-08-15 20:33                         ` Jerome Glisse
2019-08-15 20:41                           ` Jason Gunthorpe
2019-08-15 20:47                             ` Dan Williams
2019-08-16  0:40                               ` Jason Gunthorpe
2019-08-16  3:54                                 ` Dan Williams
2019-08-16 12:24                                   ` Jason Gunthorpe
2019-08-16 17:21                                     ` Dan Williams
2019-08-16 17:28                                       ` Jason Gunthorpe
2019-08-16 21:10                                         ` Ralph Campbell
2019-08-15 20:51                             ` Jerome Glisse
2019-08-16  0:43                               ` Jason Gunthorpe
2019-08-16  4:44                                 ` Christoph Hellwig
2019-08-16 12:30                                   ` Jason Gunthorpe
2019-08-16 12:34                                     ` Christoph Hellwig
2019-08-16  4:41                           ` Christoph Hellwig [this message]
2019-08-06 16:05 ` [PATCH 05/15] mm: remove the unused vma argument to hmm_range_dma_unmap Christoph Hellwig
2019-08-06 16:05 ` [PATCH 06/15] mm: remove superflous arguments from hmm_range_register Christoph Hellwig
2019-08-06 16:05 ` [PATCH 07/15] mm: remove the page_shift member from struct hmm_range Christoph Hellwig
2019-08-07 17:51   ` Jason Gunthorpe
2019-08-06 16:05 ` [PATCH 08/15] mm: remove the mask variable in hmm_vma_walk_hugetlb_entry Christoph Hellwig
2019-08-06 18:02   ` Jason Gunthorpe
2019-08-06 16:05 ` [PATCH 09/15] mm: don't abuse pte_index() in hmm_vma_handle_pmd Christoph Hellwig
2019-08-07 17:18   ` Jason Gunthorpe
2019-08-06 16:05 ` [PATCH 10/15] mm: only define hmm_vma_walk_pud if needed Christoph Hellwig
2019-08-06 16:05 ` [PATCH 11/15] mm: cleanup the hmm_vma_handle_pmd stub Christoph Hellwig
2019-08-06 18:00   ` Jason Gunthorpe
2019-08-06 16:05 ` [PATCH 12/15] mm: cleanup the hmm_vma_walk_hugetlb_entry stub Christoph Hellwig
2019-08-06 16:05 ` [PATCH 13/15] mm: allow HMM_MIRROR on all architectures with MMU Christoph Hellwig
2019-08-06 16:05 ` [PATCH 14/15] mm: make HMM_MIRROR an implicit option Christoph Hellwig
2019-08-06 17:44   ` Jason Gunthorpe
2019-08-06 16:05 ` [PATCH 15/15] amdgpu: remove CONFIG_DRM_AMDGPU_USERPTR Christoph Hellwig
2019-08-06 17:44   ` Jason Gunthorpe
2019-08-06 17:51     ` Kuehling, Felix
2019-08-06 18:58       ` Alex Deucher
2019-08-06 20:03         ` Jason Gunthorpe
2019-08-07  6:57           ` Koenig, Christian
2019-08-07 11:46             ` Jason Gunthorpe
2019-08-07 18:17 ` hmm cleanups, v2 Jason Gunthorpe

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