From: Matthew Wilcox <willy@infradead.org>
To: Alex Sierra <alex.sierra@amd.com>
Cc: rcampbell@nvidia.com, Felix.Kuehling@amd.com,
dri-devel@lists.freedesktop.org, linux-mm@kvack.org,
jglisse@redhat.com, amd-gfx@lists.freedesktop.org,
jgg@nvidia.com, akpm@linux-foundation.org, hch@lst.de
Subject: Re: [RFC PATCH v2 1/8] ext4/xfs: add page refcount helper
Date: Wed, 9 Jun 2021 20:23:35 +0100 [thread overview]
Message-ID: <YMEVN8XZbCnyPu9/@casper.infradead.org> (raw)
In-Reply-To: <20210607204226.7743-2-alex.sierra@amd.com>
On Mon, Jun 07, 2021 at 03:42:19PM -0500, Alex Sierra wrote:
> +++ b/include/linux/dax.h
> @@ -243,6 +243,16 @@ static inline bool dax_mapping(struct address_space *mapping)
> return mapping->host && IS_DAX(mapping->host);
> }
>
> +static inline bool dax_layout_is_idle_page(struct page *page)
> +{
> + return page_ref_count(page) == 1;
> +}
We already have something called an idle page, and that's quite a
different thing from this. How about dax_page_unused() (it's a use
count, so once it's got down to its minimum value, it's unused)?
next prev parent reply other threads:[~2021-06-09 19:24 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-07 20:42 [RFC PATCH v2 0/8] Support DEVICE_GENERIC memory in migrate_vma_* Alex Sierra
2021-06-07 20:42 ` [RFC PATCH v2 1/8] ext4/xfs: add page refcount helper Alex Sierra
2021-06-08 0:29 ` Liam Howlett
2021-06-08 14:33 ` Matthew Wilcox
2021-06-09 19:23 ` Matthew Wilcox [this message]
2021-06-14 15:26 ` Felix Kuehling
2021-06-07 20:42 ` [RFC PATCH v2 2/8] mm: remove extra ZONE_DEVICE struct page refcount Alex Sierra
2021-06-07 20:42 ` [RFC PATCH v2 3/8] kernel: resource: lookup_resource as exported symbol Alex Sierra
2021-06-07 20:42 ` [RFC PATCH v2 4/8] drm/amdkfd: add SPM support for SVM Alex Sierra
2021-06-07 20:42 ` [RFC PATCH v2 5/8] drm/amdkfd: generic type as sys mem on migration to ram Alex Sierra
2021-06-07 20:42 ` [RFC PATCH v2 6/8] include/linux/mm.h: helpers to check zone device generic type Alex Sierra
2021-06-07 20:42 ` [RFC PATCH v2 7/8] mm: add generic type support to migrate_vma helpers Alex Sierra
2021-06-07 20:42 ` [RFC PATCH v2 8/8] mm: call pgmap->ops->page_free for DEVICE_GENERIC pages Alex Sierra
2021-06-08 14:26 ` [RFC PATCH v2 0/8] Support DEVICE_GENERIC memory in migrate_vma_* Matthew Wilcox
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