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From: Ryan Roberts <ryan.roberts@arm.com>
To: Andrew Morton <akpm@linux-foundation.org>,
	"Matthew Wilcox (Oracle)" <willy@infradead.org>,
	"Yin, Fengwei" <fengwei.yin@intel.com>,
	Yu Zhao <yuzhao@google.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>,
	linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org
Subject: [RFC PATCH 1/6] mm: Expose clear_huge_page() unconditionally
Date: Fri, 17 Mar 2023 10:57:57 +0000	[thread overview]
Message-ID: <20230317105802.2634004-2-ryan.roberts@arm.com> (raw)
In-Reply-To: <20230317105802.2634004-1-ryan.roberts@arm.com>

In preparation for extending vma_alloc_zeroed_movable_folio() to
allocate a arbitrary order folio, expose clear_huge_page()
unconditionally, so that it can be used to zero the allocated folio.

Signed-off-by: Ryan Roberts <ryan.roberts@arm.com>
---
 include/linux/mm.h | 3 ++-
 mm/memory.c        | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 1f79667824eb..cdb8c6031d0f 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -3538,10 +3538,11 @@ enum mf_action_page_type {
  */
 extern const struct attribute_group memory_failure_attr_group;

-#if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_HUGETLBFS)
 extern void clear_huge_page(struct page *page,
 			    unsigned long addr_hint,
 			    unsigned int pages_per_huge_page);
+
+#if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_HUGETLBFS)
 extern void copy_user_huge_page(struct page *dst, struct page *src,
 				unsigned long addr_hint,
 				struct vm_area_struct *vma,
diff --git a/mm/memory.c b/mm/memory.c
index f456f3b5049c..c08645908ee2 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -5628,7 +5628,6 @@ void __might_fault(const char *file, int line)
 EXPORT_SYMBOL(__might_fault);
 #endif

-#if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_HUGETLBFS)
 /*
  * Process all subpages of the specified huge page with the specified
  * operation.  The target subpage will be processed last to keep its
@@ -5716,6 +5715,8 @@ void clear_huge_page(struct page *page,
 	process_huge_page(addr_hint, pages_per_huge_page, clear_subpage, page);
 }

+#if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_HUGETLBFS)
+
 static void copy_user_gigantic_page(struct page *dst, struct page *src,
 				    unsigned long addr,
 				    struct vm_area_struct *vma,
--
2.25.1


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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

WARNING: multiple messages have this Message-ID (diff)
From: Ryan Roberts <ryan.roberts@arm.com>
To: Andrew Morton <akpm@linux-foundation.org>,
	"Matthew Wilcox (Oracle)" <willy@infradead.org>,
	"Yin, Fengwei" <fengwei.yin@intel.com>,
	Yu Zhao <yuzhao@google.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>,
	linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org
Subject: [RFC PATCH 1/6] mm: Expose clear_huge_page() unconditionally
Date: Fri, 17 Mar 2023 10:57:57 +0000	[thread overview]
Message-ID: <20230317105802.2634004-2-ryan.roberts@arm.com> (raw)
In-Reply-To: <20230317105802.2634004-1-ryan.roberts@arm.com>

In preparation for extending vma_alloc_zeroed_movable_folio() to
allocate a arbitrary order folio, expose clear_huge_page()
unconditionally, so that it can be used to zero the allocated folio.

Signed-off-by: Ryan Roberts <ryan.roberts@arm.com>
---
 include/linux/mm.h | 3 ++-
 mm/memory.c        | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 1f79667824eb..cdb8c6031d0f 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -3538,10 +3538,11 @@ enum mf_action_page_type {
  */
 extern const struct attribute_group memory_failure_attr_group;

-#if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_HUGETLBFS)
 extern void clear_huge_page(struct page *page,
 			    unsigned long addr_hint,
 			    unsigned int pages_per_huge_page);
+
+#if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_HUGETLBFS)
 extern void copy_user_huge_page(struct page *dst, struct page *src,
 				unsigned long addr_hint,
 				struct vm_area_struct *vma,
diff --git a/mm/memory.c b/mm/memory.c
index f456f3b5049c..c08645908ee2 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -5628,7 +5628,6 @@ void __might_fault(const char *file, int line)
 EXPORT_SYMBOL(__might_fault);
 #endif

-#if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_HUGETLBFS)
 /*
  * Process all subpages of the specified huge page with the specified
  * operation.  The target subpage will be processed last to keep its
@@ -5716,6 +5715,8 @@ void clear_huge_page(struct page *page,
 	process_huge_page(addr_hint, pages_per_huge_page, clear_subpage, page);
 }

+#if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_HUGETLBFS)
+
 static void copy_user_gigantic_page(struct page *dst, struct page *src,
 				    unsigned long addr,
 				    struct vm_area_struct *vma,
--
2.25.1



  reply	other threads:[~2023-03-17 10:59 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-03-17 10:57 [RFC PATCH 0/6] variable-order, large folios for anonymous memory Ryan Roberts
2023-03-17 10:57 ` Ryan Roberts
2023-03-17 10:57 ` Ryan Roberts [this message]
2023-03-17 10:57   ` [RFC PATCH 1/6] mm: Expose clear_huge_page() unconditionally Ryan Roberts
2023-03-17 10:57 ` [RFC PATCH 2/6] mm: pass gfp flags and order to vma_alloc_zeroed_movable_folio() Ryan Roberts
2023-03-17 10:57   ` Ryan Roberts
2023-03-17 10:57 ` [RFC PATCH 3/6] mm: Introduce try_vma_alloc_zeroed_movable_folio() Ryan Roberts
2023-03-17 10:57   ` Ryan Roberts
2023-03-17 10:58 ` [RFC PATCH 4/6] mm: Implement folio_add_new_anon_rmap_range() Ryan Roberts
2023-03-17 10:58   ` Ryan Roberts
2023-03-22  6:59   ` Yin Fengwei
2023-03-22  6:59     ` Yin Fengwei
2023-03-22  7:10   ` Yin Fengwei
2023-03-22  7:10     ` Yin Fengwei
2023-03-22  7:42     ` Ryan Roberts
2023-03-22  7:42       ` Ryan Roberts
2023-03-17 10:58 ` [RFC PATCH 5/6] mm: Allocate large folios for anonymous memory Ryan Roberts
2023-03-17 10:58   ` Ryan Roberts
2023-03-17 10:58 ` [RFC PATCH 6/6] WORKAROUND: Don't split large folios on madvise Ryan Roberts
2023-03-17 10:58   ` Ryan Roberts
2023-03-22  8:19   ` Yin Fengwei
2023-03-22  8:19     ` Yin Fengwei
2023-03-22  8:59     ` Ryan Roberts
2023-03-22  8:59       ` Ryan Roberts
2023-03-22 12:03 ` [RFC PATCH 0/6] variable-order, large folios for anonymous memory Ryan Roberts
2023-03-22 12:03   ` Ryan Roberts
2023-03-22 13:36   ` Yin, Fengwei
2023-03-22 13:36     ` Yin, Fengwei
2023-03-22 14:25     ` Ryan Roberts
2023-03-22 14:25       ` Ryan Roberts

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