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Kernel: Specify default memory order for some non-synchronizing Atomics

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Tom 2021-01-03 16:58:50 -07:00 • committed by Andreas Kling
parent fb84f0ec9c
commit 901ef3f1c8
12 changed files with 44 additions and 43 deletions
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2
Kernel/VM/MemoryManager.cpp
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@ -205,7 +205,7 @@ void MemoryManager::parse_memory_map()
ASSERT(m_user_physical_pages > 0);
// We start out with no committed pages
m_user_physical_pages_uncommitted = m_user_physical_pages;
m_user_physical_pages_uncommitted = m_user_physical_pages.load();
}
PageTableEntry* MemoryManager::pte(PageDirectory& page_directory, VirtualAddress vaddr)

12
Kernel/VM/MemoryManager.h
View file

@ -208,12 +208,12 @@ private:
RefPtr<PhysicalPage> m_shared_zero_page;
RefPtr<PhysicalPage> m_lazy_committed_page;
unsigned m_user_physical_pages { 0 };
unsigned m_user_physical_pages_used { 0 };
unsigned m_user_physical_pages_committed { 0 };
unsigned m_user_physical_pages_uncommitted { 0 };
unsigned m_super_physical_pages { 0 };
unsigned m_super_physical_pages_used { 0 };
Atomic<unsigned, AK::MemoryOrder::memory_order_relaxed> m_user_physical_pages { 0 };
Atomic<unsigned, AK::MemoryOrder::memory_order_relaxed> m_user_physical_pages_used { 0 };
Atomic<unsigned, AK::MemoryOrder::memory_order_relaxed> m_user_physical_pages_committed { 0 };
Atomic<unsigned, AK::MemoryOrder::memory_order_relaxed> m_user_physical_pages_uncommitted { 0 };
Atomic<unsigned, AK::MemoryOrder::memory_order_relaxed> m_super_physical_pages { 0 };
Atomic<unsigned, AK::MemoryOrder::memory_order_relaxed> m_super_physical_pages_used { 0 };
NonnullRefPtrVector<PhysicalRegion> m_user_physical_regions;
NonnullRefPtrVector<PhysicalRegion> m_super_physical_regions;

8
Kernel/VM/VMObject.h
View file

@ -67,9 +67,9 @@ public:
VMObject* m_next { nullptr };
VMObject* m_prev { nullptr };
ALWAYS_INLINE void ref_region() { m_regions_count.fetch_add(1, AK::MemoryOrder::memory_order_relaxed); }
ALWAYS_INLINE void unref_region() { m_regions_count.fetch_sub(1, AK::MemoryOrder::memory_order_relaxed); }
ALWAYS_INLINE bool is_shared_by_multiple_regions() const { return m_regions_count.load(AK::MemoryOrder::memory_order_relaxed) > 1; }
ALWAYS_INLINE void ref_region() { m_regions_count++; }
ALWAYS_INLINE void unref_region() { m_regions_count--; }
ALWAYS_INLINE bool is_shared_by_multiple_regions() const { return m_regions_count > 1; }
protected:
explicit VMObject(size_t);
@ -88,7 +88,7 @@ private:
VMObject& operator=(VMObject&&) = delete;
VMObject(VMObject&&) = delete;
Atomic<u32> m_regions_count { 0 };
Atomic<u32, AK::MemoryOrder::memory_order_relaxed> m_regions_count { 0 };
};
}