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From: Christoph Hellwig <hch@lst.de>
To: Andrew Morton <akpm@linux-foundation.org>,
	Dan Williams <dan.j.williams@intel.com>
Cc: "Felix Kuehling" <Felix.Kuehling@amd.com>,
	"Alex Deucher" <alexander.deucher@amd.com>,
	"Christian König" <christian.koenig@amd.com>,
	"Pan, Xinhui" <Xinhui.Pan@amd.com>,
	"Ben Skeggs" <bskeggs@redhat.com>,
	"Karol Herbst" <kherbst@redhat.com>,
	"Lyude Paul" <lyude@redhat.com>, "Jason Gunthorpe" <jgg@ziepe.ca>,
	"Alistair Popple" <apopple@nvidia.com>,
	"Logan Gunthorpe" <logang@deltatee.com>,
	"Ralph Campbell" <rcampbell@nvidia.com>,
	linux-kernel@vger.kernel.org, amd-gfx@lists.freedesktop.org,
	dri-devel@lists.freedesktop.org, nouveau@lists.freedesktop.org,
	nvdimm@lists.linux.dev, linux-mm@kvack.org,
	"Jason Gunthorpe" <jgg@nvidia.com>,
	"Chaitanya Kulkarni" <kch@nvidia.com>,
	"Muchun Song" <songmuchun@bytedance.com>
Subject: [PATCH 04/27] mm: move free_devmap_managed_page to memremap.c
Date: Thu, 10 Feb 2022 08:28:05 +0100	[thread overview]
Message-ID: <20220210072828.2930359-5-hch@lst.de> (raw)
In-Reply-To: <20220210072828.2930359-1-hch@lst.de>

free_devmap_managed_page has nothing to do with the code in swap.c,
move it to live with the rest of the code for devmap handling.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
---
 include/linux/mm.h |  1 -
 mm/memremap.c      | 21 +++++++++++++++++++++
 mm/swap.c          | 23 -----------------------
 3 files changed, 21 insertions(+), 24 deletions(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 7b46174989b086..91dd0bc786a9ec 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1092,7 +1092,6 @@ static inline bool is_zone_movable_page(const struct page *page)
 }
 
 #ifdef CONFIG_DEV_PAGEMAP_OPS
-void free_devmap_managed_page(struct page *page);
 DECLARE_STATIC_KEY_FALSE(devmap_managed_key);
 
 static inline bool page_is_devmap_managed(struct page *page)
diff --git a/mm/memremap.c b/mm/memremap.c
index 5f04a0709e436e..55d23e9f5c04ec 100644
--- a/mm/memremap.c
+++ b/mm/memremap.c
@@ -501,4 +501,25 @@ void free_devmap_managed_page(struct page *page)
 	page->mapping = NULL;
 	page->pgmap->ops->page_free(page);
 }
+
+void put_devmap_managed_page(struct page *page)
+{
+	int count;
+
+	if (WARN_ON_ONCE(!page_is_devmap_managed(page)))
+		return;
+
+	count = page_ref_dec_return(page);
+
+	/*
+	 * devmap page refcounts are 1-based, rather than 0-based: if
+	 * refcount is 1, then the page is free and the refcount is
+	 * stable because nobody holds a reference on the page.
+	 */
+	if (count == 1)
+		free_devmap_managed_page(page);
+	else if (!count)
+		__put_page(page);
+}
+EXPORT_SYMBOL(put_devmap_managed_page);
 #endif /* CONFIG_DEV_PAGEMAP_OPS */
diff --git a/mm/swap.c b/mm/swap.c
index bcf3ac288b56d5..08058f74cae23e 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -1153,26 +1153,3 @@ void __init swap_setup(void)
 	 * _really_ don't want to cluster much more
 	 */
 }
-
-#ifdef CONFIG_DEV_PAGEMAP_OPS
-void put_devmap_managed_page(struct page *page)
-{
-	int count;
-
-	if (WARN_ON_ONCE(!page_is_devmap_managed(page)))
-		return;
-
-	count = page_ref_dec_return(page);
-
-	/*
-	 * devmap page refcounts are 1-based, rather than 0-based: if
-	 * refcount is 1, then the page is free and the refcount is
-	 * stable because nobody holds a reference on the page.
-	 */
-	if (count == 1)
-		free_devmap_managed_page(page);
-	else if (!count)
-		__put_page(page);
-}
-EXPORT_SYMBOL(put_devmap_managed_page);
-#endif
-- 
2.30.2


WARNING: multiple messages have this Message-ID
From: Christoph Hellwig <hch@lst.de>
To: Andrew Morton <akpm@linux-foundation.org>,
	Dan Williams <dan.j.williams@intel.com>
Cc: nvdimm@lists.linux.dev, "Ralph Campbell" <rcampbell@nvidia.com>,
	"Alistair Popple" <apopple@nvidia.com>,
	dri-devel@lists.freedesktop.org, linux-mm@kvack.org,
	nouveau@lists.freedesktop.org,
	"Felix Kuehling" <Felix.Kuehling@amd.com>,
	"Pan, Xinhui" <Xinhui.Pan@amd.com>,
	linux-kernel@vger.kernel.org, amd-gfx@lists.freedesktop.org,
	"Jason Gunthorpe" <jgg@ziepe.ca>,
	"Ben Skeggs" <bskeggs@redhat.com>,
	"Jason Gunthorpe" <jgg@nvidia.com>,
	"Muchun Song" <songmuchun@bytedance.com>,
	"Alex Deucher" <alexander.deucher@amd.com>,
	"Chaitanya Kulkarni" <kch@nvidia.com>,
	"Logan Gunthorpe" <logang@deltatee.com>,
	"Christian König" <christian.koenig@amd.com>
Subject: [Nouveau] [PATCH 04/27] mm: move free_devmap_managed_page to memremap.c
Date: Thu, 10 Feb 2022 08:28:05 +0100	[thread overview]
Message-ID: <20220210072828.2930359-5-hch@lst.de> (raw)
In-Reply-To: <20220210072828.2930359-1-hch@lst.de>

free_devmap_managed_page has nothing to do with the code in swap.c,
move it to live with the rest of the code for devmap handling.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
---
 include/linux/mm.h |  1 -
 mm/memremap.c      | 21 +++++++++++++++++++++
 mm/swap.c          | 23 -----------------------
 3 files changed, 21 insertions(+), 24 deletions(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 7b46174989b086..91dd0bc786a9ec 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1092,7 +1092,6 @@ static inline bool is_zone_movable_page(const struct page *page)
 }
 
 #ifdef CONFIG_DEV_PAGEMAP_OPS
-void free_devmap_managed_page(struct page *page);
 DECLARE_STATIC_KEY_FALSE(devmap_managed_key);
 
 static inline bool page_is_devmap_managed(struct page *page)
diff --git a/mm/memremap.c b/mm/memremap.c
index 5f04a0709e436e..55d23e9f5c04ec 100644
--- a/mm/memremap.c
+++ b/mm/memremap.c
@@ -501,4 +501,25 @@ void free_devmap_managed_page(struct page *page)
 	page->mapping = NULL;
 	page->pgmap->ops->page_free(page);
 }
+
+void put_devmap_managed_page(struct page *page)
+{
+	int count;
+
+	if (WARN_ON_ONCE(!page_is_devmap_managed(page)))
+		return;
+
+	count = page_ref_dec_return(page);
+
+	/*
+	 * devmap page refcounts are 1-based, rather than 0-based: if
+	 * refcount is 1, then the page is free and the refcount is
+	 * stable because nobody holds a reference on the page.
+	 */
+	if (count == 1)
+		free_devmap_managed_page(page);
+	else if (!count)
+		__put_page(page);
+}
+EXPORT_SYMBOL(put_devmap_managed_page);
 #endif /* CONFIG_DEV_PAGEMAP_OPS */
diff --git a/mm/swap.c b/mm/swap.c
index bcf3ac288b56d5..08058f74cae23e 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -1153,26 +1153,3 @@ void __init swap_setup(void)
 	 * _really_ don't want to cluster much more
 	 */
 }
-
-#ifdef CONFIG_DEV_PAGEMAP_OPS
-void put_devmap_managed_page(struct page *page)
-{
-	int count;
-
-	if (WARN_ON_ONCE(!page_is_devmap_managed(page)))
-		return;
-
-	count = page_ref_dec_return(page);
-
-	/*
-	 * devmap page refcounts are 1-based, rather than 0-based: if
-	 * refcount is 1, then the page is free and the refcount is
-	 * stable because nobody holds a reference on the page.
-	 */
-	if (count == 1)
-		free_devmap_managed_page(page);
-	else if (!count)
-		__put_page(page);
-}
-EXPORT_SYMBOL(put_devmap_managed_page);
-#endif
-- 
2.30.2


WARNING: multiple messages have this Message-ID
From: Christoph Hellwig <hch@lst.de>
To: Andrew Morton <akpm@linux-foundation.org>,
	Dan Williams <dan.j.williams@intel.com>
Cc: nvdimm@lists.linux.dev, "Ralph Campbell" <rcampbell@nvidia.com>,
	"Alistair Popple" <apopple@nvidia.com>,
	dri-devel@lists.freedesktop.org,
	"Karol Herbst" <kherbst@redhat.com>,
	linux-mm@kvack.org, nouveau@lists.freedesktop.org,
	"Felix Kuehling" <Felix.Kuehling@amd.com>,
	"Pan, Xinhui" <Xinhui.Pan@amd.com>,
	linux-kernel@vger.kernel.org, amd-gfx@lists.freedesktop.org,
	"Jason Gunthorpe" <jgg@ziepe.ca>,
	"Ben Skeggs" <bskeggs@redhat.com>,
	"Jason Gunthorpe" <jgg@nvidia.com>,
	"Muchun Song" <songmuchun@bytedance.com>,
	"Alex Deucher" <alexander.deucher@amd.com>,
	"Chaitanya Kulkarni" <kch@nvidia.com>,
	"Logan Gunthorpe" <logang@deltatee.com>,
	"Christian König" <christian.koenig@amd.com>
Subject: [PATCH 04/27] mm: move free_devmap_managed_page to memremap.c
Date: Thu, 10 Feb 2022 08:28:05 +0100	[thread overview]
Message-ID: <20220210072828.2930359-5-hch@lst.de> (raw)
In-Reply-To: <20220210072828.2930359-1-hch@lst.de>

free_devmap_managed_page has nothing to do with the code in swap.c,
move it to live with the rest of the code for devmap handling.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
---
 include/linux/mm.h |  1 -
 mm/memremap.c      | 21 +++++++++++++++++++++
 mm/swap.c          | 23 -----------------------
 3 files changed, 21 insertions(+), 24 deletions(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 7b46174989b086..91dd0bc786a9ec 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1092,7 +1092,6 @@ static inline bool is_zone_movable_page(const struct page *page)
 }
 
 #ifdef CONFIG_DEV_PAGEMAP_OPS
-void free_devmap_managed_page(struct page *page);
 DECLARE_STATIC_KEY_FALSE(devmap_managed_key);
 
 static inline bool page_is_devmap_managed(struct page *page)
diff --git a/mm/memremap.c b/mm/memremap.c
index 5f04a0709e436e..55d23e9f5c04ec 100644
--- a/mm/memremap.c
+++ b/mm/memremap.c
@@ -501,4 +501,25 @@ void free_devmap_managed_page(struct page *page)
 	page->mapping = NULL;
 	page->pgmap->ops->page_free(page);
 }
+
+void put_devmap_managed_page(struct page *page)
+{
+	int count;
+
+	if (WARN_ON_ONCE(!page_is_devmap_managed(page)))
+		return;
+
+	count = page_ref_dec_return(page);
+
+	/*
+	 * devmap page refcounts are 1-based, rather than 0-based: if
+	 * refcount is 1, then the page is free and the refcount is
+	 * stable because nobody holds a reference on the page.
+	 */
+	if (count == 1)
+		free_devmap_managed_page(page);
+	else if (!count)
+		__put_page(page);
+}
+EXPORT_SYMBOL(put_devmap_managed_page);
 #endif /* CONFIG_DEV_PAGEMAP_OPS */
diff --git a/mm/swap.c b/mm/swap.c
index bcf3ac288b56d5..08058f74cae23e 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -1153,26 +1153,3 @@ void __init swap_setup(void)
 	 * _really_ don't want to cluster much more
 	 */
 }
-
-#ifdef CONFIG_DEV_PAGEMAP_OPS
-void put_devmap_managed_page(struct page *page)
-{
-	int count;
-
-	if (WARN_ON_ONCE(!page_is_devmap_managed(page)))
-		return;
-
-	count = page_ref_dec_return(page);
-
-	/*
-	 * devmap page refcounts are 1-based, rather than 0-based: if
-	 * refcount is 1, then the page is free and the refcount is
-	 * stable because nobody holds a reference on the page.
-	 */
-	if (count == 1)
-		free_devmap_managed_page(page);
-	else if (!count)
-		__put_page(page);
-}
-EXPORT_SYMBOL(put_devmap_managed_page);
-#endif
-- 
2.30.2


  parent reply	other threads:[~2022-02-10  7:28 UTC|newest]

Thread overview: 114+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-02-10  7:28 start sorting out the ZONE_DEVICE refcount mess v2 Christoph Hellwig
2022-02-10  7:28 ` Christoph Hellwig
2022-02-10  7:28 ` [Nouveau] " Christoph Hellwig
2022-02-10  7:28 ` [PATCH 01/27] mm: remove a pointless CONFIG_ZONE_DEVICE check in memremap_pages Christoph Hellwig
2022-02-10  7:28   ` Christoph Hellwig
2022-02-10  7:28   ` [Nouveau] " Christoph Hellwig
2022-02-10 11:37   ` Miaohe Lin
2022-02-10 11:37     ` [Nouveau] " Miaohe Lin
2022-02-10 11:37     ` Miaohe Lin
2022-02-10  7:28 ` [PATCH 02/27] mm: remove the __KERNEL__ guard from <linux/mm.h> Christoph Hellwig
2022-02-10  7:28   ` Christoph Hellwig
2022-02-10  7:28   ` [Nouveau] " Christoph Hellwig
2022-02-10  7:28 ` [PATCH 03/27] mm: remove pointless includes from <linux/hmm.h> Christoph Hellwig
2022-02-10  7:28   ` Christoph Hellwig
2022-02-10  7:28   ` [Nouveau] " Christoph Hellwig
2022-02-10  9:39   ` Muchun Song
2022-02-10  9:39     ` [Nouveau] " Muchun Song
2022-02-10  9:39     ` Muchun Song
2022-02-10  7:28 ` Christoph Hellwig [this message]
2022-02-10  7:28   ` [PATCH 04/27] mm: move free_devmap_managed_page to memremap.c Christoph Hellwig
2022-02-10  7:28   ` [Nouveau] " Christoph Hellwig
2022-02-10  7:28 ` [PATCH 05/27] mm: simplify freeing of devmap managed pages Christoph Hellwig
2022-02-10  7:28   ` Christoph Hellwig
2022-02-10  7:28   ` [Nouveau] " Christoph Hellwig
2022-02-10  7:28 ` [PATCH 06/27] mm: don't include <linux/memremap.h> in <linux/mm.h> Christoph Hellwig
2022-02-10  7:28   ` Christoph Hellwig
2022-02-10  7:28   ` [Nouveau] " Christoph Hellwig
2022-02-10  7:28 ` [PATCH 07/27] mm: remove the extra ZONE_DEVICE struct page refcount Christoph Hellwig
2022-02-10  7:28   ` Christoph Hellwig
2022-02-10  7:28   ` [Nouveau] " Christoph Hellwig
2022-02-10  7:28 ` [PATCH 08/27] fsdax: depend on ZONE_DEVICE || FS_DAX_LIMITED Christoph Hellwig
2022-02-10  7:28   ` Christoph Hellwig
2022-02-10  7:28   ` [Nouveau] " Christoph Hellwig
2022-02-10  7:28 ` [PATCH 09/27] mm: generalize the pgmap based page_free infrastructure Christoph Hellwig
2022-02-10  7:28   ` Christoph Hellwig
2022-02-10  7:28   ` [Nouveau] " Christoph Hellwig
2022-02-14 17:37   ` Logan Gunthorpe
2022-02-14 17:37     ` Logan Gunthorpe
2022-02-14 17:37     ` [Nouveau] " Logan Gunthorpe
2022-02-10  7:28 ` [PATCH 10/27] mm: refactor check_and_migrate_movable_pages Christoph Hellwig
2022-02-10  7:28   ` Christoph Hellwig
2022-02-10  7:28   ` [Nouveau] " Christoph Hellwig
2022-02-10  7:28 ` [PATCH 11/27] mm: refactor the ZONE_DEVICE handling in migrate_vma_insert_page Christoph Hellwig
2022-02-10  7:28   ` Christoph Hellwig
2022-02-10  7:28   ` [Nouveau] " Christoph Hellwig
2022-02-10 10:48   ` Alistair Popple
2022-02-10 10:48     ` Alistair Popple
2022-02-10 10:48     ` [Nouveau] " Alistair Popple
2022-02-10  7:28 ` [PATCH 12/27] mm: refactor the ZONE_DEVICE handling in migrate_vma_pages Christoph Hellwig
2022-02-10  7:28   ` Christoph Hellwig
2022-02-10  7:28   ` [Nouveau] " Christoph Hellwig
2022-02-10 10:46   ` Alistair Popple
2022-02-10 10:46     ` Alistair Popple
2022-02-10 10:46     ` [Nouveau] " Alistair Popple
2022-02-10  7:28 ` [PATCH 13/27] mm: move the migrate_vma_* device migration code into it's own file Christoph Hellwig
2022-02-10  7:28   ` Christoph Hellwig
2022-02-10  7:28   ` [Nouveau] " Christoph Hellwig
2022-02-10 10:35   ` Alistair Popple
2022-02-10 10:35     ` Alistair Popple
2022-02-10 10:35     ` [Nouveau] " Alistair Popple
2022-02-10 15:23     ` Christoph Hellwig
2022-02-10 15:23       ` Christoph Hellwig
2022-02-10 15:23       ` [Nouveau] " Christoph Hellwig
2022-02-10  7:28 ` [PATCH 14/27] mm: build migrate_vma_* for all configs with ZONE_DEVICE support Christoph Hellwig
2022-02-10  7:28   ` Christoph Hellwig
2022-02-10  7:28   ` [Nouveau] " Christoph Hellwig
2022-02-10 10:43   ` Alistair Popple
2022-02-10 10:43     ` Alistair Popple
2022-02-10 10:43     ` [Nouveau] " Alistair Popple
2022-02-10  7:28 ` [PATCH 15/27] mm: add zone device coherent type memory support Christoph Hellwig
2022-02-10  7:28   ` Christoph Hellwig
2022-02-10  7:28   ` [Nouveau] " Christoph Hellwig
2022-02-10  7:28 ` [PATCH 16/27] mm: add device coherent vma selection for memory migration Christoph Hellwig
2022-02-10  7:28   ` Christoph Hellwig
2022-02-10  7:28   ` [Nouveau] " Christoph Hellwig
2022-02-10  7:28 ` [PATCH 17/27] mm/gup: fail get_user_pages for LONGTERM dev coherent type Christoph Hellwig
2022-02-10  7:28   ` Christoph Hellwig
2022-02-10  7:28   ` [Nouveau] " Christoph Hellwig
2022-02-10  7:28 ` [PATCH 18/27] drm/amdkfd: add SPM support for SVM Christoph Hellwig
2022-02-10  7:28   ` Christoph Hellwig
2022-02-10  7:28   ` [Nouveau] " Christoph Hellwig
2022-02-10  7:28 ` [PATCH 19/27] drm/amdkfd: coherent type as sys mem on migration to ram Christoph Hellwig
2022-02-10  7:28   ` Christoph Hellwig
2022-02-10  7:28   ` [Nouveau] " Christoph Hellwig
2022-02-10  7:28 ` [PATCH 20/27] lib: test_hmm add ioctl to get zone device type Christoph Hellwig
2022-02-10  7:28   ` Christoph Hellwig
2022-02-10  7:28   ` [Nouveau] " Christoph Hellwig
2022-02-10  7:28 ` [PATCH 21/27] lib: test_hmm add module param for " Christoph Hellwig
2022-02-10  7:28   ` Christoph Hellwig
2022-02-10  7:28   ` [Nouveau] " Christoph Hellwig
2022-02-10  7:28 ` [PATCH 22/27] lib: add support for device coherent type in test_hmm Christoph Hellwig
2022-02-10  7:28   ` Christoph Hellwig
2022-02-10  7:28   ` [Nouveau] " Christoph Hellwig
2022-02-10  7:28 ` [PATCH 23/27] tools: update hmm-test to support device coherent type Christoph Hellwig
2022-02-10  7:28   ` Christoph Hellwig
2022-02-10  7:28   ` [Nouveau] " Christoph Hellwig
2022-02-10  7:28 ` [PATCH 24/27] tools: update test_hmm script to support SP config Christoph Hellwig
2022-02-10  7:28   ` Christoph Hellwig
2022-02-10  7:28   ` [Nouveau] " Christoph Hellwig
2022-02-10  7:28 ` [PATCH 25/27] mm: remove the vma check in migrate_vma_setup() Christoph Hellwig
2022-02-10  7:28   ` Christoph Hellwig
2022-02-10  7:28   ` [Nouveau] " Christoph Hellwig
2022-02-10  7:28 ` [PATCH 26/27] mm/gup: migrate device coherent pages when pinning instead of failing Christoph Hellwig
2022-02-10  7:28   ` Christoph Hellwig
2022-02-10  7:28   ` [Nouveau] " Christoph Hellwig
2022-02-10  7:28 ` [PATCH 27/27] tools: add hmm gup test for long term pinned device pages Christoph Hellwig
2022-02-10  7:28   ` Christoph Hellwig
2022-02-10  7:28   ` [Nouveau] " Christoph Hellwig
2022-02-10 10:56 ` start sorting out the ZONE_DEVICE refcount mess v2 Alistair Popple
2022-02-10 10:56   ` Alistair Popple
2022-02-10 10:56   ` [Nouveau] " Alistair Popple
2022-02-10 17:36 ` Sierra Guiza, Alejandro (Alex)
2022-02-10 17:36   ` [Nouveau] " Sierra Guiza, Alejandro (Alex)
2022-02-10 17:36   ` Sierra Guiza, Alejandro (Alex)

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