函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:mm\swap_state.c Create Date:2022-07-27 16:44:56
Last Modify:2020-03-17 22:02:06 Copyright©Brick
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函数名称：swap_use_vma_readahead

函数原型：static inline bool swap_use_vma_readahead(void)

返回类型：bool

参数：无

301  返回:READ_ONCE(enable_vma_readahead)且非atomic_read( & nr_rotate_swap)
调用者
名称描述
lookup_swap_cacheLookup a swap entry in the swap cache. A found page will be returned* unlocked and with its refcount incremented - we rely on the kernel* lock getting page table operations atomic even if we drop the page* lock before returning.
swapin_readaheadswapin_readahead - swap in pages in hope we need them soon*@entry: swap entry of this memory*@gfp_mask: memory allocation flags*@vmf: fault information* Returns the struct page for entry and addr, after queueing swapin.