函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\sched\psi.c Create Date:2022-07-27 10:47:03
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：psi_memstall_enter - mark the beginning of a memory stall section*@flags: flags to handle nested sections* Marks the calling task as being stalled due to a lack of memory,* such as waiting for a refault or performing reclaim.

函数原型：void psi_memstall_enter(unsigned long *flags)

返回类型：void

参数：

类型参数名称
unsigned long *flags
818  如果static_branch_likely( & psi_disabled)则返回
821  flags等于flags按位与Stalled due to lack of memory
822  如果flags则返回
829  rq等于this_rq_lock_irq( & rf)
831  flags或等于Stalled due to lack of memory
832  psi_task_change(当前进程, 0, TSK_MEMSTALL)
834  rq_unlock_irq(rq, & rf)
调用者
名称描述
try_to_free_mem_cgroup_pages
balance_pgdatFor kswapd, balance_pgdat() will reclaim pages across a node from zones* that are eligible for use by the caller until at least one zone is* balanced.* Returns the order kswapd finished reclaiming at.
__perform_reclaimPerform direct synchronous page reclaim
swap_readpage
mem_cgroup_handle_over_highScheduled by try_charge() to be executed from the userland return path* and reclaims memory over the high limit.
blkcg_maybe_throttle_blkgThis is called when we want to actually walk up the hierarchy and check to* see if we need to throttle, and then actually throttle if there is some* accumulated delay. This should only be called upon return to user space so