linux-4.4.1/migrate_page_copy() の履歴(No.1)

• 履歴一覧
• 差分 を表示
• 現在との差分 を表示
• ソース を表示
• linux-4.4.1/migrate_page_copy() へ行く。
  • 1 (2017-09-15 (金) 20:57:20)

参照元†

• linux-4.4.1/migrate_page()

説明†

• パス: [[linux-4.4.1/]]

• FIXME: これは何？
  • 説明

引数†

• struct page *newpage
  • linux-4.4.1/page struct page *page

返り値†

• void

参考†

実装†

/*
 * Copy the page to its new location
 */
void migrate_page_copy(struct page *newpage, struct page *page)
{
	int cpupid;

	if (PageHuge(page) || PageTransHuge(page))
		copy_huge_page(newpage, page);
	else
		copy_highpage(newpage, page);

• • linux-4.4.1/PageHuge()
  • linux-4.4.1/PageTransHuge()
  • linux-4.4.1/copy_huge_page()
  • linux-4.4.1/copy_highpage()

	if (PageError(page))
		SetPageError(newpage);
	if (PageReferenced(page))
		SetPageReferenced(newpage);
	if (PageUptodate(page))
		SetPageUptodate(newpage);

• • linux-4.4.1/PageError()
  • linux-4.4.1/SetPageError()
  • linux-4.4.1/PageReferenced()
  • linux-4.4.1/SetPageReferenced()
  • linux-4.4.1/PageUptodate()
  • linux-4.4.1/SetPageUptodate()

	if (TestClearPageActive(page)) {
		VM_BUG_ON_PAGE(PageUnevictable(page), page);
		SetPageActive(newpage);
	} else if (TestClearPageUnevictable(page))
		SetPageUnevictable(newpage);

• • linux-4.4.1/TestClearPageActive()
  • linux-4.4.1/VM_BUG_ON_PAGE()
  • linux-4.4.1/PageUnevictable()
  • linux-4.4.1/SetPageActive()
  • linux-4.4.1/TestClearPageUnevictable()
  • linux-4.4.1/SetPageUnevictable()

	if (PageChecked(page))
		SetPageChecked(newpage);
	if (PageMappedToDisk(page))
		SetPageMappedToDisk(newpage);

• • linux-4.4.1/PageChecked()
  • linux-4.4.1/SetPageChecked()
  • linux-4.4.1/PageMappedToDisk()
  • linux-4.4.1/SetPageMappedToDisk()

	/* Move dirty on pages not done by migrate_page_move_mapping() */
	if (PageDirty(page))
		SetPageDirty(newpage);

	if (page_is_young(page))
		set_page_young(newpage);
	if (page_is_idle(page))
		set_page_idle(newpage);

• • linux-4.4.1/PageDirty()
  • linux-4.4.1/SetPageDirty()
  • linux-4.4.1/page_is_young()
  • linux-4.4.1/set_page_young()
  • linux-4.4.1/page_is_idle()
  • linux-4.4.1/set_page_idle()

	/*
	 * Copy NUMA information to the new page, to prevent over-eager
	 * future migrations of this same page.
	 */
	cpupid = page_cpupid_xchg_last(page, -1);
	page_cpupid_xchg_last(newpage, cpupid);

	ksm_migrate_page(newpage, page);

• • linux-4.4.1/page_cpupid_xchg_last()
  • linux-4.4.1/ksm_migrate_page()

	/*
	 * Please do not reorder this without considering how mm/ksm.c's
	 * get_ksm_page() depends upon ksm_migrate_page() and PageSwapCache().
	 */
	if (PageSwapCache(page))
		ClearPageSwapCache(page);
	ClearPagePrivate(page);
	set_page_private(page, 0);

• • linux-4.4.1/PageSwapCache()
  • linux-4.4.1/ClearPageSwapCache()
  • linux-4.4.1/ClearPagePrivate()
  • linux-4.4.1/set_page_private()

	/*
	 * If any waiters have accumulated on the new page then
	 * wake them up.
	 */
	if (PageWriteback(newpage))
		end_page_writeback(newpage);

• • linux-4.4.1/PageWriteback()
  • linux-4.4.1/end_page_writeback()

}

コメント†