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Kernel: Store AddressSpace memory regions in an IntrusiveRedBlackTree

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This means we never need to allocate when inserting/removing regions
from the address space.
This commit is contained in:
Andreas Kling 2022-04-02 01:28:01 +02:00
parent 7381474835
commit 2617adac52
7 changed files with 99 additions and 81 deletions
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9
Kernel/Memory/AddressSpace.h
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@ -12,6 +12,7 @@
#include <AK/WeakPtr.h>
#include <Kernel/Memory/AllocationStrategy.h>
#include <Kernel/Memory/PageDirectory.h>
#include <Kernel/Memory/Region.h>
#include <Kernel/UnixTypes.h>
namespace Kernel::Memory {
@ -28,8 +29,8 @@ public:
size_t region_count() const { return m_regions.size(); }
RedBlackTree<FlatPtr, NonnullOwnPtr<Region>>& regions() { return m_regions; }
RedBlackTree<FlatPtr, NonnullOwnPtr<Region>> const& regions() const { return m_regions; }
auto& regions() { return m_regions; }
auto const& regions() const { return m_regions; }
void dump_regions();
@ -68,11 +69,13 @@ public:
private:
explicit AddressSpace(NonnullRefPtr<PageDirectory>);
void delete_all_regions_assuming_they_are_unmapped();
mutable RecursiveSpinlock m_lock;
RefPtr<PageDirectory> m_page_directory;
RedBlackTree<FlatPtr, NonnullOwnPtr<Region>> m_regions;
IntrusiveRedBlackTree<&Region::m_tree_node> m_regions;
bool m_enforces_syscall_regions { false };
};