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From: Anshuman Khandual <anshuman.khandual@arm.com>
To: linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Cc: suzuki.poulose@arm.com, punit.agrawal@arm.com,
	will.deacon@arm.com, Steven.Price@arm.com,
	catalin.marinas@arm.com, mhocko@kernel.org,
	mike.kravetz@oracle.com, n-horiguchi@ah.jp.nec.com
Subject: [PATCH 4/4] arm64/mm: Enable HugeTLB migration for contiguous bit HugeTLB pages
Date: Tue,  2 Oct 2018 17:45:31 +0530	[thread overview]
Message-ID: <1538482531-26883-5-git-send-email-anshuman.khandual@arm.com> (raw)
In-Reply-To: <1538482531-26883-1-git-send-email-anshuman.khandual@arm.com>

Let arm64 subscribe to the previously added framework in which architecture
can inform whether a given huge page size is supported for migration. This
just overrides the default function arch_hugetlb_migration_supported() and
enables migration for all possible HugeTLB page sizes on arm64. With this,
HugeTLB migration support on arm64 now covers all possible HugeTLB options.

        CONT PTE    PMD    CONT PMD    PUD
        --------    ---    --------    ---
4K:        64K      2M        32M      1G
16K:        2M     32M         1G
64K:        2M    512M        16G

Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
---
 arch/arm64/include/asm/hugetlb.h |  5 +++++
 arch/arm64/mm/hugetlbpage.c      | 20 ++++++++++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/arch/arm64/include/asm/hugetlb.h b/arch/arm64/include/asm/hugetlb.h
index e73f685..656f70e 100644
--- a/arch/arm64/include/asm/hugetlb.h
+++ b/arch/arm64/include/asm/hugetlb.h
@@ -20,6 +20,11 @@
 
 #include <asm/page.h>
 
+#ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION
+#define arch_hugetlb_migration_supported arch_hugetlb_migration_supported
+extern bool arch_hugetlb_migration_supported(struct hstate *h);
+#endif
+
 static inline pte_t huge_ptep_get(pte_t *ptep)
 {
 	return READ_ONCE(*ptep);
diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c
index 4eafd9f..28f4795 100644
--- a/arch/arm64/mm/hugetlbpage.c
+++ b/arch/arm64/mm/hugetlbpage.c
@@ -27,6 +27,26 @@
 #include <asm/tlbflush.h>
 #include <asm/pgalloc.h>
 
+#ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION
+bool arch_hugetlb_migration_supported(struct hstate *h)
+{
+	size_t pagesize = huge_page_size(h);
+
+	switch (pagesize) {
+#ifdef CONFIG_ARM64_4K_PAGES
+	case PUD_SIZE:
+#endif
+	case PMD_SIZE:
+	case CONT_PMD_SIZE:
+	case CONT_PTE_SIZE:
+		return true;
+	}
+	pr_warn("%s: unrecognized huge page size 0x%lx\n",
+			__func__, pagesize);
+	return false;
+}
+#endif
+
 int pmd_huge(pmd_t pmd)
 {
 	return pmd_val(pmd) && !(pmd_val(pmd) & PMD_TABLE_BIT);
-- 
2.7.4


WARNING: multiple messages have this Message-ID (diff)
From: anshuman.khandual@arm.com (Anshuman Khandual)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 4/4] arm64/mm: Enable HugeTLB migration for contiguous bit HugeTLB pages
Date: Tue,  2 Oct 2018 17:45:31 +0530	[thread overview]
Message-ID: <1538482531-26883-5-git-send-email-anshuman.khandual@arm.com> (raw)
In-Reply-To: <1538482531-26883-1-git-send-email-anshuman.khandual@arm.com>

Let arm64 subscribe to the previously added framework in which architecture
can inform whether a given huge page size is supported for migration. This
just overrides the default function arch_hugetlb_migration_supported() and
enables migration for all possible HugeTLB page sizes on arm64. With this,
HugeTLB migration support on arm64 now covers all possible HugeTLB options.

        CONT PTE    PMD    CONT PMD    PUD
        --------    ---    --------    ---
4K:        64K      2M        32M      1G
16K:        2M     32M         1G
64K:        2M    512M        16G

Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
---
 arch/arm64/include/asm/hugetlb.h |  5 +++++
 arch/arm64/mm/hugetlbpage.c      | 20 ++++++++++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/arch/arm64/include/asm/hugetlb.h b/arch/arm64/include/asm/hugetlb.h
index e73f685..656f70e 100644
--- a/arch/arm64/include/asm/hugetlb.h
+++ b/arch/arm64/include/asm/hugetlb.h
@@ -20,6 +20,11 @@
 
 #include <asm/page.h>
 
+#ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION
+#define arch_hugetlb_migration_supported arch_hugetlb_migration_supported
+extern bool arch_hugetlb_migration_supported(struct hstate *h);
+#endif
+
 static inline pte_t huge_ptep_get(pte_t *ptep)
 {
 	return READ_ONCE(*ptep);
diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c
index 4eafd9f..28f4795 100644
--- a/arch/arm64/mm/hugetlbpage.c
+++ b/arch/arm64/mm/hugetlbpage.c
@@ -27,6 +27,26 @@
 #include <asm/tlbflush.h>
 #include <asm/pgalloc.h>
 
+#ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION
+bool arch_hugetlb_migration_supported(struct hstate *h)
+{
+	size_t pagesize = huge_page_size(h);
+
+	switch (pagesize) {
+#ifdef CONFIG_ARM64_4K_PAGES
+	case PUD_SIZE:
+#endif
+	case PMD_SIZE:
+	case CONT_PMD_SIZE:
+	case CONT_PTE_SIZE:
+		return true;
+	}
+	pr_warn("%s: unrecognized huge page size 0x%lx\n",
+			__func__, pagesize);
+	return false;
+}
+#endif
+
 int pmd_huge(pmd_t pmd)
 {
 	return pmd_val(pmd) && !(pmd_val(pmd) & PMD_TABLE_BIT);
-- 
2.7.4

  parent reply	other threads:[~2018-10-02 12:15 UTC|newest]

Thread overview: 54+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-02 12:15 [PATCH 0/4] arm64/mm: Enable HugeTLB migration Anshuman Khandual
2018-10-02 12:15 ` Anshuman Khandual
2018-10-02 12:15 ` [PATCH 1/4] mm/hugetlb: Enable PUD level huge page migration Anshuman Khandual
2018-10-02 12:15   ` Anshuman Khandual
2018-10-02 12:38   ` Suzuki K Poulose
2018-10-02 12:38     ` Suzuki K Poulose
2018-10-02 12:56     ` Anshuman Khandual
2018-10-02 12:56       ` Anshuman Khandual
2018-10-02 12:56       ` Anshuman Khandual
2018-10-03 10:22       ` Suzuki K Poulose
2018-10-03 10:22         ` Suzuki K Poulose
2018-10-03 10:22         ` Suzuki K Poulose
2018-10-03 11:10         ` Anshuman Khandual
2018-10-03 11:10           ` Anshuman Khandual
2018-10-03 11:10           ` Anshuman Khandual
2018-10-03 11:17           ` Suzuki K Poulose
2018-10-03 11:17             ` Suzuki K Poulose
2018-10-03 11:17             ` Suzuki K Poulose
2018-10-03 11:27             ` Michal Hocko
2018-10-03 11:27               ` Michal Hocko
2018-10-02 12:39   ` Michal Hocko
2018-10-02 12:39     ` Michal Hocko
2018-10-03  2:16     ` Anshuman Khandual
2018-10-03  2:16       ` Anshuman Khandual
2018-10-03  6:58       ` Michal Hocko
2018-10-03  6:58         ` Michal Hocko
2018-10-03  9:58         ` Anshuman Khandual
2018-10-03  9:58           ` Anshuman Khandual
2018-10-03 10:59           ` Michal Hocko
2018-10-03 10:59             ` Michal Hocko
2018-10-03 11:37             ` Anshuman Khandual
2018-10-03 11:37               ` Anshuman Khandual
2018-10-03 11:48               ` Michal Hocko
2018-10-03 11:48                 ` Michal Hocko
2018-10-03 13:06                 ` Anshuman Khandual
2018-10-03 13:06                   ` Anshuman Khandual
2018-10-03 13:36                   ` Michal Hocko
2018-10-03 13:36                     ` Michal Hocko
2018-10-05  7:34                     ` Anshuman Khandual
2018-10-05  7:34                       ` Anshuman Khandual
2018-10-09 14:14                       ` Michal Hocko
2018-10-09 14:14                         ` Michal Hocko
2018-10-10  3:09                         ` Anshuman Khandual
2018-10-10  3:09                           ` Anshuman Khandual
2018-10-10  9:39                           ` Michal Hocko
2018-10-10  9:39                             ` Michal Hocko
2018-10-11  3:16                             ` Anshuman Khandual
2018-10-11  3:16                               ` Anshuman Khandual
2018-10-02 12:15 ` [PATCH 2/4] mm/hugetlb: Enable arch specific huge page size support for migration Anshuman Khandual
2018-10-02 12:15   ` Anshuman Khandual
2018-10-02 12:15 ` [PATCH 3/4] arm64/mm: Enable HugeTLB migration Anshuman Khandual
2018-10-02 12:15   ` Anshuman Khandual
2018-10-02 12:15 ` Anshuman Khandual [this message]
2018-10-02 12:15   ` [PATCH 4/4] arm64/mm: Enable HugeTLB migration for contiguous bit HugeTLB pages Anshuman Khandual

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