函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:mm\util.c Create Date:2022-07-27 15:46:09
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：Committed memory limit enforced when OVERCOMMIT_NEVER policy is used

函数原型：unsigned long vm_commit_limit(void)

返回类型：unsigned long

参数：无

751  如果sysctl_overcommit_kbytes则allowed等于sysctl_overcommit_kbytes右移PAGE_SHIFT determines the page size 减10位
753  否则allowed等于totalram_pages()减hugetlb_total_pages()的差乘sysctl_overcommit_ratio除100
756  allowed加等于total_swap_pages
758  返回:allowed
调用者
名称描述
__vm_enough_memoryCheck that a process has enough memory to allocate a new virtual* mapping. 0 means there is enough memory for the allocation to* succeed and -ENOMEM implies there is not.* We currently support three overcommit policies, which are set via the* vm