From: Matthew Wilcox <willy@infradead.org>
To: Alex Sierra <alex.sierra@amd.com>
Cc: akpm@linux-foundation.org, Felix.Kuehling@amd.com,
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,
apopple@nvidia.com
Subject: Re: [PATCH v1 2/2] mm: remove extra ZONE_DEVICE struct page refcount
Date: Thu, 14 Oct 2021 17:52:35 +0100 [thread overview]
Message-ID: <YWhgU2vJfTN6XOyl@casper.infradead.org> (raw)
In-Reply-To: <20211014153928.16805-3-alex.sierra@amd.com>
On Thu, Oct 14, 2021 at 10:39:28AM -0500, Alex Sierra wrote:
> From: Ralph Campbell <rcampbell@nvidia.com>
>
> ZONE_DEVICE struct pages have an extra reference count that complicates the
> code for put_page() and several places in the kernel that need to check the
> reference count to see that a page is not being used (gup, compaction,
> migration, etc.). Clean up the code so the reference count doesn't need to
> be treated specially for ZONE_DEVICE.
>
> Signed-off-by: Ralph Campbell <rcampbell@nvidia.com>
> Signed-off-by: Alex Sierra <alex.sierra@amd.com>
> Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
next prev parent reply other threads:[~2021-10-14 16:53 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-14 15:39 [PATCH v1 0/2] mm: remove extra ZONE_DEVICE struct page refcount Alex Sierra
2021-10-14 15:39 ` [PATCH v1 1/2] ext4/xfs: add page refcount helper Alex Sierra
2021-10-14 16:25 ` Jason Gunthorpe
2021-10-14 16:40 ` Matthew Wilcox
2021-10-14 15:39 ` [PATCH v1 2/2] mm: remove extra ZONE_DEVICE struct page refcount Alex Sierra
2021-10-14 16:52 ` Matthew Wilcox [this message]
2021-10-14 17:06 ` Jason Gunthorpe
2021-10-14 17:35 ` Ralph Campbell
2021-10-14 18:01 ` Jason Gunthorpe
2021-10-14 20:57 ` Ralph Campbell
2021-10-15 3:45 ` Sierra Guiza, Alejandro (Alex)
2021-10-15 11:06 ` Jason Gunthorpe
2021-10-14 18:43 ` Matthew Wilcox
2021-10-14 19:01 ` Dan Williams
2021-10-14 23:06 ` Jason Gunthorpe
2021-10-15 1:37 ` Dan Williams
2021-10-16 15:44 ` Jason Gunthorpe
2021-10-16 16:39 ` Matthew Wilcox
2021-10-17 18:20 ` Dan Williams
2021-10-17 18:35 ` Dan Williams
2021-10-18 18:25 ` Jason Gunthorpe
2021-10-18 19:37 ` Dan Williams
2021-10-18 23:06 ` Jason Gunthorpe
2021-10-19 15:13 ` Joao Martins
2021-10-19 16:01 ` Jason Gunthorpe
2021-10-19 19:21 ` Dan Williams
2021-10-20 17:06 ` Joao Martins
2021-10-20 17:12 ` Dan Williams
2021-10-20 18:51 ` Joao Martins
2021-11-15 19:33 [PATCH v1 0/2] Remove extra ZONE_DEVICE " Alex Sierra
2021-11-15 19:33 ` [PATCH v1 2/2] mm: remove extra ZONE_DEVICE struct " Alex Sierra
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