函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:mm\swapfile.c Create Date:2022-07-27 16:48:54
Last Modify:2020-03-17 22:19:49 Copyright©Brick
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函数名称：unuse_mm

函数原型：static int unuse_mm(struct mm_struct *mm, unsigned int type, bool frontswap, unsigned long *fs_pages_to_unuse)

返回类型：int

参数：

类型参数名称
struct mm_struct *mm
unsigned inttype
boolfrontswap
unsigned long *fs_pages_to_unuse
2071  ret等于0
2073  lock for reading
2074  以vma循环
2075  如果Serialized by page_table_lock 则
2076  ret等于unuse_vma(vma, type, frontswap, fs_pages_to_unuse)
2078  如果ret则退出
2081  cond_resched()
2083  lease a read lock
2084  返回:ret
调用者
名称描述
try_to_unuseIf the boolean frontswap is true, only unuse pages_to_unuse pages;* pages_to_unuse==0 means all pages; ignored if frontswap is false
io_sq_thread
__io_worker_unuseNote: drops the wqe->lock if returning true! The caller must re-acquire* the lock in that case. Some callers need to restart handling if this* happens, so we can't just re-acquire the lock on behalf of the caller.