linux-2.6.33/page_evictable()

参照元†

説明†

• パス: linux-2.6.33/mm/vmscan.c

• 指定したページが排除可能かどうかを判断する。

引数†

• struct page *page
  • 排除可能かどうか判断するページ。
  • linux-2.6.33/page
• struct vm_area_struct *vma
  • linux-2.6.33/vm_area_struct

返り値†

• int
  • 排除可能ならば 1、そうでなければ 0

参考†

実装†

/*
 * page_evictable - test whether a page is evictable
 * @page: the page to test
 * @vma: the VMA in which the page is or will be mapped, may be NULL
 *
 * Test whether page is evictable--i.e., should be placed on active/inactive
 * lists vs unevictable list.  The vma argument is !NULL when called from the
 * fault path to determine how to instantate a new page.
 *
 * Reasons page might not be evictable:
 * (1) page's mapping marked unevictable
 * (2) page is part of an mlocked VMA
 *
 */
int page_evictable(struct page *page, struct vm_area_struct *vma)
{

	if (mapping_unevictable(page_mapping(page)))
		return 0;

• • linux-2.6.33/mapping_unevictable()

• linux-2.6.33/page_mapping()

	if (PageMlocked(page) || (vma && is_mlocked_vma(vma, page)))
		return 0;

• • linux-2.6.33/PageMlocked()

• linux-2.6.33/is_mlocked_vma()

	return 1;
}

コメント†

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• katsuhiro

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