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Kernel: Put all Regions on InlineLinkedLists (separated by user/kernel)

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Remove the global hash tables and replace them with InlineLinkedLists.
This significantly reduces the kernel heap pressure from doing many
small mmap()'s.
This commit is contained in:
Andreas Kling 2019-08-08 10:53:24 +02:00
parent a96d76fd90
commit 07425580a8
4 changed files with 14 additions and 8 deletions
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8
Kernel/VM/Region.h
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@ -2,13 +2,15 @@
#include <AK/AKString.h>
#include <AK/Bitmap.h>
#include <AK/InlineLinkedList.h>
#include <Kernel/VM/PageDirectory.h>
#include <Kernel/VM/RangeAllocator.h>
class Inode;
class VMObject;
class Region : public RefCounted<Region> {
class Region : public RefCounted<Region>
, public InlineLinkedListNode<Region> {
friend class MemoryManager;
public:
@ -100,6 +102,10 @@ public:
m_access &= ~Access::Write;
}
// For InlineLinkedListNode
Region* m_next { nullptr };
Region* m_prev { nullptr };
private:
Region(const Range&, const String&, u8 access, bool cow = false);
Region(const Range&, NonnullRefPtr<VMObject>, size_t offset_in_vmo, const String&, u8 access, bool cow = false);