From: Christoph Hellwig <hch@lst.de>
To: Felix Kuehling <felix.kuehling@amd.com>
Cc: Theodore Ts'o <tytso@mit.edu>, Alex Sierra <alex.sierra@amd.com>,
akpm@linux-foundation.org, linux-mm@kvack.org,
rcampbell@nvidia.com, linux-ext4@vger.kernel.org,
linux-xfs@vger.kernel.org, amd-gfx@lists.freedesktop.org,
dri-devel@lists.freedesktop.org, hch@lst.de, jgg@nvidia.com,
jglisse@redhat.com
Subject: Re: [PATCH v3 0/8] Support DEVICE_GENERIC memory in migrate_vma_*
Date: Thu, 24 Jun 2021 07:30:48 +0200 [thread overview]
Message-ID: <20210624053048.GB25004@lst.de> (raw)
In-Reply-To: <905418d1-9099-0ea8-a6e6-84cc8ef3d0b0@amd.com>
On Wed, Jun 23, 2021 at 05:49:55PM -0400, Felix Kuehling wrote:
> For the reference counting changes we could use the dax driver with hmem
> and use efi_fake_mem on the kernel command line to create some
> DEVICE_GENERIC pages. I'm open to suggestions for good user mode tests to
> exercise dax functionality on this type of memory.
>
> For the migration helper changes we could modify or parametrize
> lib/hmm_test.c to create DEVICE_GENERIC pages instead of DEVICE_PRIVATE.
> Then run tools/testing/selftests/vm/hmm-tests.c.
We'll also need a real in-tree user of the enhanced DEVICE_GENERIC memory.
So while the refcounting cleanups early in the series are something I'd
really like to see upstream as soon as everything is sorted out, the
actual bits that can't only be used by your updated driver should wait
for that.
next prev parent reply other threads:[~2021-06-24 5:30 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-17 15:16 [PATCH v3 0/8] Support DEVICE_GENERIC memory in migrate_vma_* Alex Sierra
2021-06-17 15:16 ` [PATCH v3 1/8] ext4/xfs: add page refcount helper Alex Sierra
2021-06-17 16:11 ` Darrick J. Wong
2021-06-17 23:52 ` Dave Chinner
2021-06-19 16:14 ` Sierra Guiza, Alejandro (Alex)
2021-06-19 18:31 ` Alex Sierra
2021-06-17 15:16 ` [PATCH v3 2/8] mm: remove extra ZONE_DEVICE struct page refcount Alex Sierra
2021-06-17 19:16 ` Ralph Campbell
2021-06-28 16:46 ` Felix Kuehling
2021-06-30 0:23 ` Ralph Campbell
2021-06-17 15:17 ` [PATCH v3 3/8] kernel: resource: lookup_resource as exported symbol Alex Sierra
2021-06-17 15:17 ` [PATCH v3 4/8] drm/amdkfd: add SPM support for SVM Alex Sierra
2021-06-17 15:17 ` [PATCH v3 5/8] drm/amdkfd: generic type as sys mem on migration to ram Alex Sierra
2021-06-17 15:17 ` [PATCH v3 6/8] include/linux/mm.h: helpers to check zone device generic type Alex Sierra
2021-06-17 15:17 ` [PATCH v3 7/8] mm: add generic type support to migrate_vma helpers Alex Sierra
2021-06-17 15:17 ` [PATCH v3 8/8] mm: call pgmap->ops->page_free for DEVICE_GENERIC pages Alex Sierra
2021-06-17 15:56 ` [PATCH v3 0/8] Support DEVICE_GENERIC memory in migrate_vma_* Sierra Guiza, Alejandro (Alex)
2021-06-20 14:14 ` Theodore Ts'o
2021-06-23 21:49 ` Felix Kuehling
2021-06-24 5:30 ` Christoph Hellwig [this message]
2021-06-24 15:08 ` Felix Kuehling
2021-07-16 15:07 ` Theodore Y. Ts'o
2021-07-16 22:14 ` Felix Kuehling
2021-07-17 19:54 ` Sierra Guiza, Alejandro (Alex)
2021-07-23 22:46 ` Sierra Guiza, Alejandro (Alex)
2021-07-30 19:02 ` Felix Kuehling
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