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From: Muchun Song <songmuchun@bytedance.com>
To: will@kernel.org, akpm@linux-foundation.org, david@redhat.com,
	bodeddub@amazon.com, osalvador@suse.de, mike.kravetz@oracle.com,
	rientjes@google.com
Cc: linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	duanxiongchun@bytedance.com, fam.zheng@bytedance.com,
	zhengqi.arch@bytedance.com,
	Muchun Song <songmuchun@bytedance.com>
Subject: [PATCH] arm64: mm: hugetlb: add support for free vmemmap pages of HugeTLB
Date: Tue, 18 May 2021 17:18:26 +0800	[thread overview]
Message-ID: <20210518091826.36937-1-songmuchun@bytedance.com> (raw)

The preparation of supporting freeing vmemmap associated with each
HugeTLB page is ready, so we can support this feature for arm64.

Signed-off-by: Muchun Song <songmuchun@bytedance.com>
---
 arch/arm64/mm/mmu.c | 5 +++++
 fs/Kconfig          | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index 5d37e461c41f..967b01ce468d 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -23,6 +23,7 @@
 #include <linux/mm.h>
 #include <linux/vmalloc.h>
 #include <linux/set_memory.h>
+#include <linux/hugetlb.h>
 
 #include <asm/barrier.h>
 #include <asm/cputype.h>
@@ -1134,6 +1135,10 @@ int __meminit vmemmap_populate(unsigned long start, unsigned long end, int node,
 	pmd_t *pmdp;
 
 	WARN_ON((start < VMEMMAP_START) || (end > VMEMMAP_END));
+
+	if (is_hugetlb_free_vmemmap_enabled() && !altmap)
+		return vmemmap_populate_basepages(start, end, node, altmap);
+
 	do {
 		next = pmd_addr_end(addr, end);
 
diff --git a/fs/Kconfig b/fs/Kconfig
index 6ce6fdac00a3..02c2d3bf1cb8 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -242,7 +242,7 @@ config HUGETLB_PAGE
 
 config HUGETLB_PAGE_FREE_VMEMMAP
 	def_bool HUGETLB_PAGE
-	depends on X86_64
+	depends on X86_64 || ARM64
 	depends on SPARSEMEM_VMEMMAP
 
 config MEMFD_CREATE
-- 
2.11.0


WARNING: multiple messages have this Message-ID (diff)
From: Muchun Song <songmuchun@bytedance.com>
To: will@kernel.org, akpm@linux-foundation.org, david@redhat.com,
	bodeddub@amazon.com, osalvador@suse.de, mike.kravetz@oracle.com,
	rientjes@google.com
Cc: linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	duanxiongchun@bytedance.com, fam.zheng@bytedance.com,
	zhengqi.arch@bytedance.com,
	Muchun Song <songmuchun@bytedance.com>
Subject: [PATCH] arm64: mm: hugetlb: add support for free vmemmap pages of HugeTLB
Date: Tue, 18 May 2021 17:18:26 +0800	[thread overview]
Message-ID: <20210518091826.36937-1-songmuchun@bytedance.com> (raw)

The preparation of supporting freeing vmemmap associated with each
HugeTLB page is ready, so we can support this feature for arm64.

Signed-off-by: Muchun Song <songmuchun@bytedance.com>
---
 arch/arm64/mm/mmu.c | 5 +++++
 fs/Kconfig          | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index 5d37e461c41f..967b01ce468d 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -23,6 +23,7 @@
 #include <linux/mm.h>
 #include <linux/vmalloc.h>
 #include <linux/set_memory.h>
+#include <linux/hugetlb.h>
 
 #include <asm/barrier.h>
 #include <asm/cputype.h>
@@ -1134,6 +1135,10 @@ int __meminit vmemmap_populate(unsigned long start, unsigned long end, int node,
 	pmd_t *pmdp;
 
 	WARN_ON((start < VMEMMAP_START) || (end > VMEMMAP_END));
+
+	if (is_hugetlb_free_vmemmap_enabled() && !altmap)
+		return vmemmap_populate_basepages(start, end, node, altmap);
+
 	do {
 		next = pmd_addr_end(addr, end);
 
diff --git a/fs/Kconfig b/fs/Kconfig
index 6ce6fdac00a3..02c2d3bf1cb8 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -242,7 +242,7 @@ config HUGETLB_PAGE
 
 config HUGETLB_PAGE_FREE_VMEMMAP
 	def_bool HUGETLB_PAGE
-	depends on X86_64
+	depends on X86_64 || ARM64
 	depends on SPARSEMEM_VMEMMAP
 
 config MEMFD_CREATE
-- 
2.11.0


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             reply	other threads:[~2021-05-18  9:21 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-18  9:18 Muchun Song [this message]
2021-05-18  9:18 ` [PATCH] arm64: mm: hugetlb: add support for free vmemmap pages of HugeTLB Muchun Song
2021-05-19 11:45 ` Anshuman Khandual
2021-05-19 11:45   ` Anshuman Khandual
2021-05-19 12:03   ` David Hildenbrand
2021-05-19 12:03     ` David Hildenbrand
2021-05-20 11:54     ` Anshuman Khandual
2021-05-20 11:54       ` Anshuman Khandual
2021-05-20 11:59       ` David Hildenbrand
2021-05-20 11:59         ` David Hildenbrand
2021-05-21  5:02         ` Anshuman Khandual
2021-05-21  5:02           ` Anshuman Khandual
2021-05-19 12:49   ` [External] " Muchun Song
2021-05-19 12:49     ` Muchun Song
2021-05-19 12:49     ` Muchun Song
2021-05-20 12:00     ` Anshuman Khandual
2021-05-20 12:00       ` Anshuman Khandual
2021-05-19 12:36 ` Anshuman Khandual
2021-05-19 12:36   ` Anshuman Khandual
2021-05-19 14:43   ` [External] " Muchun Song
2021-05-19 14:43     ` Muchun Song
2021-05-19 14:43     ` Muchun Song
2021-05-19 15:22     ` Muchun Song
2021-05-19 15:22       ` Muchun Song
2021-05-19 15:22       ` Muchun Song
2021-05-19 16:21       ` Muchun Song
2021-05-19 16:21         ` Muchun Song
2021-05-19 16:21         ` Muchun Song
2021-05-19 22:44         ` Mike Kravetz
2021-05-19 22:44           ` Mike Kravetz
2022-01-11 13:16 Muchun Song
2022-01-11 13:16 ` Muchun Song
2022-01-12 12:01 ` Mark Rutland
2022-01-12 12:01   ` Mark Rutland
2022-01-13  6:28   ` Muchun Song
2022-01-13  6:28     ` Muchun Song

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