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, steve.capper@arm.com,
catalin.marinas@arm.com, mhocko@kernel.org,
akpm@linux-foundation.org, mike.kravetz@oracle.com,
n-horiguchi@ah.jp.nec.com
Subject: [PATCH V3 5/5] arm64/mm: Enable HugeTLB migration for contiguous bit HugeTLB pages
Date: Tue, 23 Oct 2018 18:32:01 +0530 [thread overview]
Message-ID: <1540299721-26484-6-git-send-email-anshuman.khandual@arm.com> (raw)
In-Reply-To: <1540299721-26484-1-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
Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
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 21512ca..f3afdcf 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
next prev parent reply other threads:[~2018-10-23 13:02 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-23 13:01 [PATCH V3 0/5] arm64/mm: Enable HugeTLB migration Anshuman Khandual
2018-10-23 13:01 ` [PATCH V3 1/5] mm/hugetlb: Distinguish between migratability and movability Anshuman Khandual
2018-10-24 13:54 ` Michal Hocko
2018-11-08 10:33 ` Steve Capper
2018-10-23 13:01 ` [PATCH V3 2/5] mm/hugetlb: Enable PUD level huge page migration Anshuman Khandual
2018-11-08 10:34 ` Steve Capper
2018-10-23 13:01 ` [PATCH V3 3/5] mm/hugetlb: Enable arch specific huge page size support for migration Anshuman Khandual
2018-10-24 13:56 ` Michal Hocko
2018-10-24 13:58 ` Michal Hocko
2018-10-25 6:23 ` Anshuman Khandual
2018-10-25 7:45 ` Michal Hocko
2018-11-08 10:35 ` Steve Capper
2018-10-23 13:02 ` [PATCH V3 4/5] arm64/mm: Enable HugeTLB migration Anshuman Khandual
2018-11-08 10:35 ` Steve Capper
2018-11-23 14:42 ` Catalin Marinas
2018-10-23 13:02 ` Anshuman Khandual [this message]
2018-11-08 10:36 ` [PATCH V3 5/5] arm64/mm: Enable HugeTLB migration for contiguous bit HugeTLB pages Steve Capper
2018-11-23 14:42 ` Catalin Marinas
2018-11-23 15:08 ` [PATCH V3 0/5] arm64/mm: Enable HugeTLB migration Anshuman Khandual
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