Function report |
Source Code:mm\swapfile.c |
Create Date:2022-07-28 15:18:13 |
Last Modify:2020-03-17 22:19:49 | Copyright©Brick |
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Name:No need to decide whether this PTE shares the swap entry with others,* just let do_wp_page work it out if a write is requested later - to* force COW, vm_page_prot omits write permission from any private vma.
Proto:static int unuse_pte(struct vm_area_struct *vma, pmd_t *pmd, unsigned long addr, swp_entry_t entry, struct page *page)
Type:int
Parameter:
Type | Parameter | Name |
---|---|---|
struct vm_area_struct * | vma | |
pmd_t * | pmd | |
unsigned long | addr | |
swp_entry_t | entry | |
struct page * | page |
1860 | ret = 1 |
1863 | page = ksm_might_need_to_copy(page, vma, addr) |
1864 | If Value for the false possibility is greater at compile time(!page) Then Return -ENOMEM |
1867 | If mem_cgroup_try_charge(page, The address space we belong to. , GFP_KERNEL, & memcg, false) Then |
1870 | Go to out_nolock |
1873 | pte = pte_offset_map_lock(The address space we belong to. , pmd, addr, & ptl) |
1887 | mem_cgroup_commit_charge(page, memcg, true, false) |
1888 | Else |
1898 | activate_page(page) |
1899 | out : |
1900 | pte_unmap_unlock(pte, ptl) |
1901 | out_nolock : |
1906 | Return ret |
Name | Describe |
---|---|
unuse_pte_range |
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