函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:mm\ksm.c Create Date:2022-07-27 17:15:17
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：ksm_scan_thread

函数原型：static int ksm_scan_thread(void *nothing)

返回类型：int

参数：

类型参数名称
void *nothing
2403  set_freezable - make %current freezable* Mark %current freezable and enter refrigerator if necessary.
2404  set_user_nice(当前进程, 5)
2406  当非kthread_should_stop - should this kthread return now?* When someone calls kthread_stop() on your kthread, it will be woken* and this will return true. You should then return, and your return* value will be passed through to kthread_stop().循环
2407  mutex_lock( & ksm_thread_mutex)
2408  wait_while_offlining()
2409  如果ksmd_should_run()则ksm_do_scan - the ksm scanner main worker function.*@scan_npages: number of pages we want to scan before we return.
2411  mutex_unlock - release the mutex*@lock: the mutex to be released* Unlock a mutex that has been locked by this task previously.* This function must not be used in interrupt context. Unlocking* of a not locked mutex is not allowed.
2413  try_to_freeze()
2415  如果ksmd_should_run()则
2416  sleep_ms等于READ_ONCE(Milliseconds ksmd should sleep between batches )
2417  wait_event_interruptible_timeout - sleep until a condition gets true or a timeout elapses*@wq_head: the waitqueue to wait on*@condition: a C expression for the event to wait for*@timeout: timeout, in jiffies* The process is put to sleep (ksm_iter_wait, sleep_ms != READ_ONCE(Milliseconds ksmd should sleep between batches ), msecs_to_jiffies: - convert milliseconds to jiffies*@m: time in milliseconds* conversion is done as follows:* - negative values mean 'infinite timeout' (MAX_JIFFY_OFFSET)* - 'too large' values [that would result in larger than)
2420  否则
2421  wait_event_freezable - sleep (or freeze) until a condition gets true*@wq_head: the waitqueue to wait on*@condition: a C expression for the event to wait for* The process is put to sleep (TASK_INTERRUPTIBLE -- so as not to contribute(ksm_thread_wait, ksmd_should_run() || kthread_should_stop - should this kthread return now?* When someone calls kthread_stop() on your kthread, it will be woken* and this will return true. You should then return, and your return* value will be passed through to kthread_stop().)
2425  返回:0