RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-06-01 10:18:13 +00:00
Code Issues Activity Actions

Kernel: Return an already destructed PhysicalPage to the allocators

Browse source 
By making sure the PhysicalPage instance is fully destructed the
allocators will have a chance to reclaim the PhysicalPageEntry for
free-list purposes. Just pass them the physical address of the page
that was freed, which is enough to lookup the PhysicalPageEntry later.
This commit is contained in:
Tom 2021-07-07 20:28:51 -06:00 • committed by Andreas Kling
parent 87dc4c3d2c
commit c1006a3689
6 changed files with 32 additions and 28 deletions
Download patch file Download diff file Expand all files Collapse all files

4
Kernel/VM/MemoryManager.h
View file

@ -143,8 +143,8 @@ public:
RefPtr<PhysicalPage> allocate_user_physical_page(ShouldZeroFill = ShouldZeroFill::Yes, bool* did_purge = nullptr);
RefPtr<PhysicalPage> allocate_supervisor_physical_page();
NonnullRefPtrVector<PhysicalPage> allocate_contiguous_supervisor_physical_pages(size_t size, size_t physical_alignment = PAGE_SIZE);
void deallocate_user_physical_page(const PhysicalPage&);
void deallocate_supervisor_physical_page(const PhysicalPage&);
void deallocate_user_physical_page(PhysicalAddress);
void deallocate_supervisor_physical_page(PhysicalAddress);
OwnPtr<Region> allocate_contiguous_kernel_region(size_t, StringView name, Region::Access access, size_t physical_alignment = PAGE_SIZE, Region::Cacheable = Region::Cacheable::Yes);
OwnPtr<Region> allocate_kernel_region(size_t, StringView name, Region::Access access, AllocationStrategy strategy = AllocationStrategy::Reserve, Region::Cacheable = Region::Cacheable::Yes);