page_action

Name:page_action

Proto:static int page_action(struct page_state *ps, struct page *p, unsigned long pfn)

Type:int

Parameter:

Type	Parameter	Name
struct page_state *	ps
struct page *	p
unsigned long	pfn

889

result = action(p, pfn)

891

count = page_count(p) - 1

892

If action == Clean and dirty swap cache.* Dirty swap cache page is tricky to handle. The page could live both in page* cache and swap cache(ie. page is freshly swapped in). So it could be* referenced concurrently by 2 types of PTEs:* normal PTEs and swap PTEs && result == Will be handled later Then count--

894

If count > 0 Then

895

pr_err("Memory failure: %#lx: %s still referenced by %d users\n", pfn, action_page_types[type], count)

897

result = Error: handling failed

899

"Dirty/Clean" indication is not 100% accurate due to the possibility of* setting PG_dirty outside page lock. See also comment above set_page_dirty().

906

Return If result == Successfully recovered || result == Will be handled later Then 0 Else -EBUSY

**Caller**
Name	Describe
identify_page_state

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