zap_pte_range

函数名称：zap_pte_range

函数原型：static unsigned long zap_pte_range(struct mmu_gather *tlb, struct vm_area_struct *vma, pmd_t *pmd, unsigned long addr, unsigned long end, struct zap_details *details)

返回类型：unsigned long

参数：

类型	参数	名称
struct mmu_gather *	tlb
struct vm_area_struct *	vma
pmd_t *	pmd
unsigned long	addr
unsigned long	end
struct zap_details *	details

1043

ptent等于pte

1044

如果pte_none(ptent)则继续下一循环

1047

如果need_resched()则退出

1050

如果pte_present(ptent)则

1053

page等于vm_normal_page -- This function gets the "struct page" associated with a pte.* "Special" mappings do not wish to be associated with a "struct page" (either* it doesn't exist, or it exists but they don't want to touch it). In this

1054

如果此条件成立可能性小(为编译器优化)(details)且page则

1060

如果Check page->mapping if set 且Check page->mapping if set 不等于Neutral page->mapping pointer to address_space or anon_vma or other 则继续下一循环

1064

ptent等于ptep_get_and_clear_full(mm, addr, pte, we are in the middle of an operation to clear* a full mm and can make some optimizations)

1066

lb_remove_tlb_entry - remember a pte unmapping for later tlb invalidation.* Record the fact that pte's were really unmapped by updating the range,* so we can later optimise away the tlb invalidate. This helps when(tlb, pte, addr)

1067

如果此条件成立可能性小(为编译器优化)(!page)则继续下一循环

1070

如果非PageAnon(page)则

1071

如果The following only work if pte_present() is true.* Undefined behaviour if not..则

1072

force_flush等于1

1073

Dirty a page

1075

如果pte_young(ptent)且此条件成立可能性大(为编译器优化)(!(Flags, see mm.h. & App will access data sequentially ))则Mark a page as having seen activity.* inactive,unreferenced -> inactive,referenced* inactive,referenced -> active,unreferenced* active,unreferenced -> active,referenced* When a newly allocated page is not yet visible, so safe for non-atomic ops,

1079

rss[mm_counter(page)]自减

1080

page_remove_rmap(page, false)

1081

如果此条件成立可能性小(为编译器优化)(page_mapcount(page) < 0)则This function is called to print an error when a bad pte* is found. For example, we might have a PFN-mapped pte in* a region that doesn't allow it.* The calling function must still handle the error.

1083

如果此条件成立可能性小(为编译器优化)(__tlb_remove_page(tlb, page))则

1084

force_flush等于1

1085

addr加等于PAGE_SIZE

1086

退出

1088

继续下一循环

1091

entry等于Convert the arch-dependent pte representation of a swp_entry_t into an* arch-independent swp_entry_t.

1092

如果non_swap_entry(entry)且is_device_private_entry(entry)则

1093

page等于device_private_entry_to_page(entry)

1095

如果此条件成立可能性小(为编译器优化)(details && Check page->mapping if set )则

1101

如果Check page->mapping if set 不等于Neutral page->mapping pointer to address_space or anon_vma or other 则继续下一循环

1106

Some architectures may be able to avoid expensive synchronization* primitives when modifications are made to PTE's which are already* not present, or in the process of an address space destruction.

1107

rss[mm_counter(page)]自减

1108

page_remove_rmap(page, false)

1109

put_page(page)

1110

继续下一循环

1114

如果此条件成立可能性小(为编译器优化)(details)则继续下一循环

1117

如果非non_swap_entry(entry)则rss[MM_SWAPENTS]自减

1119

否则如果is_migration_entry(entry)则

1122

page等于migration_entry_to_page(entry)

1123

rss[mm_counter(page)]自减

1125

如果此条件成立可能性小(为编译器优化)(!free_swap_and_cache(entry))则This function is called to print an error when a bad pte* is found. For example, we might have a PFN-mapped pte in* a region that doesn't allow it.* The calling function must still handle the error.

1127

Some architectures may be able to avoid expensive synchronization* primitives when modifications are made to PTE's which are already* not present, or in the process of an address space destruction.

函数逻辑报告