函数逻辑报告

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v5.5.9

Brick Technologies Co., Ltd

Source Code:fs\dax.c Create Date:2022-07-29 10:56:21
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：dax_busy_page

函数原型：static struct page *dax_busy_page(void *entry)

返回类型：struct page

参数：

类型参数名称
void *entry
373  page等于pfn_to_page(pfn)
375  如果page_ref_count(page)大于1则返回:page
378  返回:NULL
调用者
名称描述
dax_layout_busy_pagedax_layout_busy_page - find first pinned page in @mapping*@mapping: address space to scan for a page with ref count > 1* DAX requires ZONE_DEVICE mapped pages. These pages are never* 'onlined' to the page allocator so they are considered idle when