set_hwpoison_free_buddy

Name:Set PG_hwpoison flag if a given page is confirmed to be a free page. This* test is performed under the zone lock to prevent a race against page* allocation.

Proto:bool set_hwpoison_free_buddy_page(struct page *page)

Type:bool

Parameter:

Type	Parameter	Name
struct page *	page

8728

zone = page_zone(page)

8729

pfn = page_to_pfn(page)

8732

bool hwpoisoned = false

8734

spin_lock_irqsave( & Primarily protects free_area , flags)

8735

When order < Free memory management - zoned buddy allocator. cycle

8736

page_head = page - (pfn & (1 << order) - 1 )

8738

If PageBuddy() indicates that the page is free and in the buddy system* (see mm/page_alloc.c). && page_order(page_head) >= order Then

8739

If Not TestSetPageHWPoison(page) Then hwpoisoned = true

8741

Break

8744

spin_unlock_irqrestore( & Primarily protects free_area , flags)

8746

Return hwpoisoned

**Caller**
Name	Describe
unmap_and_move	Obtain the lock on page, remove all ptes and migrate the page* to the newly allocated page in newpage.
soft_offline_huge_page
soft_offline_free_page

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Function report