From: Anshuman Khandual <anshuman.khandual@arm.com>
To: linux-arm-kernel@lists.infradead.org
Cc: mark.rutland@arm.com, yuzhao@google.com, Steve.Capper@arm.com,
marc.zyngier@arm.com, Catalin.Marinas@arm.com,
suzuki.poulose@arm.com, will.deacon@arm.com, james.morse@arm.com
Subject: [PATCH V2 5/6] arm64/mm: Enable page table page accounting for user space
Date: Mon, 25 Feb 2019 10:33:58 +0530 [thread overview]
Message-ID: <1551071039-20192-6-git-send-email-anshuman.khandual@arm.com> (raw)
In-Reply-To: <1551071039-20192-1-git-send-email-anshuman.khandual@arm.com>
Page table pages created for user space processes must be accounted against
their memory control groups if initialized. This just introduces a helper
function pgtable_gfp_flags() which returns PGALLOC_GFP for all kernel page
table page allocations but adds __GFP_ACCOUNT for user page table pages.
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
---
arch/arm64/include/asm/pgalloc.h | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/include/asm/pgalloc.h b/arch/arm64/include/asm/pgalloc.h
index 076764f66fb0..a02a4d1d967d 100644
--- a/arch/arm64/include/asm/pgalloc.h
+++ b/arch/arm64/include/asm/pgalloc.h
@@ -100,12 +100,24 @@ pte_alloc_one_kernel(struct mm_struct *mm)
return (pte_t *)pte_alloc_one_virt(mm);
}
+extern struct mm_struct efi_mm;
+
+static inline gfp_t pgtable_gfp_flags(struct mm_struct *mm)
+{
+ if (unlikely((mm == &init_mm) || (mm == &efi_mm)))
+ return PGALLOC_GFP;
+ else
+ return PGALLOC_GFP | __GFP_ACCOUNT;
+}
+
static inline pgtable_t
pte_alloc_one(struct mm_struct *mm)
{
struct page *pte;
+ gfp_t gfp;
- pte = alloc_pages(PGALLOC_GFP, 0);
+ gfp = pgtable_gfp_flags(mm);
+ pte = alloc_pages(gfp, 0);
if (!pte)
return NULL;
if (!pgtable_page_ctor(pte)) {
--
2.20.1
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next prev parent reply other threads:[~2019-02-25 5:05 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-25 5:03 [PATCH V2 0/6] arm64/mm: Enable accounting for page table pages Anshuman Khandual
2019-02-25 5:03 ` [PATCH V2 1/6] KVM: ARM: Remove pgtable standard functions from stage-2 page tables Anshuman Khandual
2019-02-25 11:00 ` Mark Rutland
2019-02-25 14:20 ` Anshuman Khandual
2019-02-25 15:49 ` Mark Rutland
2019-02-26 4:15 ` Anshuman Khandual
2019-02-26 8:51 ` Anshuman Khandual
2019-02-25 5:03 ` [PATCH V2 2/6] arm64/mm: Make pgd_pgtable_alloc() call pte_alloc_one() always Anshuman Khandual
2019-02-25 11:08 ` Mark Rutland
2019-02-25 14:41 ` Anshuman Khandual
2019-02-25 5:03 ` [PATCH V2 3/6] arm64/mm: Make all page table pages cycles through standard constructs Anshuman Khandual
2019-02-25 5:03 ` [PATCH V2 4/6] arm64/mm: Call pgtable_page_dtor() for both PMD and PUD page table pages Anshuman Khandual
2019-02-25 5:03 ` Anshuman Khandual [this message]
2019-02-25 11:11 ` [PATCH V2 5/6] arm64/mm: Enable page table page accounting for user space Mark Rutland
2019-02-25 14:49 ` Anshuman Khandual
2019-02-25 15:35 ` Mark Rutland
2019-02-26 5:06 ` Anshuman Khandual
2019-02-26 6:37 ` Anshuman Khandual
2019-02-25 5:03 ` [PATCH V2 6/6] arm64/mm: Enable ARCH_ENABLE_SPLIT_PMD_PTLOCK Anshuman Khandual
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