page_idle_clear_pte_refs

Name:page_idle_clear_pte_refs

Proto:static void page_idle_clear_pte_refs(struct page *page)

Type:void

Parameter:

Type	Parameter	Name
struct page *	page

101

static const struct rmap_walk_control rwc = { executed on each vma where page is mapped = page_idle_clear_pte_refs_one, for getting anon_lock by optimized way rather than default = Similar to page_get_anon_vma() except it locks the anon_vma.* Its a little more complex as it tries to keep the fast path to a single* atomic op -- the trylock. If we fail the trylock, we fall back to getting a, }

107

If Not Return true if this page is mapped into pagetables.* For compound page it returns true if any subpage of compound page is mapped. || Not Neutral page->mapping pointer to address_space or anon_vma or other Then Return

111

need_lock = Not PageAnon(page) || A KSM page is one of those write-protected "shared pages" or "merged pages"* which KSM maps into multiple mms, wherever identical anonymous page content* is found in VM_MERGEABLE vmas. It's a PageAnon page, pointing not to any

112

If need_lock && Not Return true if the page was successfully locked Then Return

115

rmap_walk(page, (structrmap_walk_control * ) & rwc)

117

If need_lock Then lock_page - unlock a locked page*@page: the page* Unlocks the page and wakes up sleepers in ___wait_on_page_locked().* Also wakes sleepers in wait_on_page_writeback() because the wakeup* mechanism between PageLocked pages and PageWriteback pages is shared.

**Caller**
Name	Describe
page_idle_bitmap_read
page_idle_bitmap_write

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