free_pgtables

Name:free_pgtables

Proto:void free_pgtables(struct mmu_gather *tlb, struct vm_area_struct *vma, unsigned long floor, unsigned long ceiling)

Type:void

Parameter:

Type	Parameter	Name
struct mmu_gather *	tlb
struct vm_area_struct *	vma
unsigned long	floor
unsigned long	ceiling

391

When vma cycle

392

next = linked list of VM areas per task, sorted by address

393

addr = Our start address within vm_mm.

399

unlink_anon_vmas(vma)

400

unlink_file_vma(vma)

402

If is_vm_hugetlb_page(vma) Then

403

hugetlb_free_pgd_range(tlb, addr, The first byte after our end addresswithin vm_mm. , floor, next ? Our start address within vm_mm. : ceiling)

405

Else

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When next && Our start address within vm_mm. <= The first byte after our end addresswithin vm_mm. + PMD_SIZE && Not is_vm_hugetlb_page(next) cycle

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vma = next

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next = linked list of VM areas per task, sorted by address

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unlink_anon_vmas(vma)

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unlink_file_vma(vma)

416

This function frees user-level page tables of a process.

419

vma = next

**Caller**
Name	Describe
unmap_region
exit_mmap	Release all mmaps.

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