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SubjectRe: [PATCH net 1/4] umh: add exit routine for UMH process
From: Taehee Yoo <>
Date: Mon, 31 Dec 2018 01:31:43 +0900

> +void exit_umh(struct task_struct *tsk)
> +{
> + struct umh_info *info;
> + pid_t pid = tsk->pid;
> +
> + mutex_lock(&umh_list_lock);
> + list_for_each_entry(info, &umh_list, list) {

So this is probably too expensive of a cost for every process exit.
The problem is that the cost will be taken even if the process is
not a UMH.

I've taken my time to respond in hopes that I could come up with a
good alternative to suggest, but so far I don't have any better ideas.

I'll keep thinking about this some more, please let me know if you
have any ideas.

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