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Kernel: Add some inline capacity to find_regions_intersecting

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This should avoid some allocations during simple cases of munmap,
mprotect and msync, where you usually don't have a lot of regions anyway
This commit is contained in:
Hendiadyoin1 2022-06-19 15:27:35 +02:00 • committed by Andreas Kling
parent c3e57bfccb
commit 66fc06001d
2 changed files with 3 additions and 3 deletions
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4
Kernel/Memory/AddressSpace.cpp
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@ -253,9 +253,9 @@ Region* AddressSpace::find_region_containing(VirtualRange const& range)
return m_region_tree.find_region_containing(range); return m_region_tree.find_region_containing(range);
} }
ErrorOr<Vector<Region*>> AddressSpace::find_regions_intersecting(VirtualRange const& range) ErrorOr<Vector<Region*, 4>> AddressSpace::find_regions_intersecting(VirtualRange const& range)
{ {
Vector<Region*> regions = {}; Vector<Region*, 4> regions = {};
size_t total_size_collected = 0; size_t total_size_collected = 0;
SpinlockLocker lock(m_lock); SpinlockLocker lock(m_lock);

2
Kernel/Memory/AddressSpace.h
View file

@ -45,7 +45,7 @@ public:
Region* find_region_from_range(VirtualRange const&); Region* find_region_from_range(VirtualRange const&);
Region* find_region_containing(VirtualRange const&); Region* find_region_containing(VirtualRange const&);
ErrorOr<Vector<Region*>> find_regions_intersecting(VirtualRange const&); ErrorOr<Vector<Region*, 4>> find_regions_intersecting(VirtualRange const&);
bool enforces_syscall_regions() const { return m_enforces_syscall_regions; } bool enforces_syscall_regions() const { return m_enforces_syscall_regions; }
void set_enforces_syscall_regions(bool b) { m_enforces_syscall_regions = b; } void set_enforces_syscall_regions(bool b) { m_enforces_syscall_regions = b; }