diff options
| author | Ryan Roberts <ryan.roberts@arm.com> | 2024-02-15 10:32:04 +0000 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-02-22 15:27:19 -0800 |
| commit | b972fc6afba002319fe23bc698ce6431ee43868c (patch) | |
| tree | d7de836ab43b60b444da91157371aab2d89346ed /arch/arm64/include | |
| parent | fb5451e5f72b31002760083a99fbb41771c4f1ad (diff) | |
arm64/mm: __always_inline to improve fork() perf
As set_ptes() and wrprotect_ptes() become a bit more complex, the compiler
may choose not to inline them. But this is critical for fork()
performance. So mark the functions, along with contpte_try_unfold() which
is called by them, as __always_inline. This is worth ~1% on the fork()
microbenchmark with order-0 folios (the common case).
Link: https://lkml.kernel.org/r/20240215103205.2607016-18-ryan.roberts@arm.com
Signed-off-by: Ryan Roberts <ryan.roberts@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Barry Song <21cnbao@gmail.com>
Cc: Borislav Petkov (AMD) <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Morse <james.morse@arm.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will@kernel.org>
Cc: Yang Shi <shy828301@gmail.com>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'arch/arm64/include')
| -rw-r--r-- | arch/arm64/include/asm/pgtable.h | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index d759a20d2929..8310875133ff 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -1206,8 +1206,8 @@ extern int contpte_ptep_set_access_flags(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep, pte_t entry, int dirty); -static inline void contpte_try_unfold(struct mm_struct *mm, unsigned long addr, - pte_t *ptep, pte_t pte) +static __always_inline void contpte_try_unfold(struct mm_struct *mm, + unsigned long addr, pte_t *ptep, pte_t pte) { if (unlikely(pte_valid_cont(pte))) __contpte_try_unfold(mm, addr, ptep, pte); @@ -1278,7 +1278,7 @@ static inline void set_pte(pte_t *ptep, pte_t pte) } #define set_ptes set_ptes -static inline void set_ptes(struct mm_struct *mm, unsigned long addr, +static __always_inline void set_ptes(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte, unsigned int nr) { pte = pte_mknoncont(pte); @@ -1360,8 +1360,8 @@ static inline int ptep_clear_flush_young(struct vm_area_struct *vma, } #define wrprotect_ptes wrprotect_ptes -static inline void wrprotect_ptes(struct mm_struct *mm, unsigned long addr, - pte_t *ptep, unsigned int nr) +static __always_inline void wrprotect_ptes(struct mm_struct *mm, + unsigned long addr, pte_t *ptep, unsigned int nr) { if (likely(nr == 1)) { /* |