Re: [PATCH 3/3] livepatch: force transition process to finish

From	Josh Poimboeuf <jpoimboe@redhat.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH 3/3] livepatch: force transition process to finish
Date	2017-05-26 19:50 +0200
Message-ID	<tLrx7-r5-1@gated-at.bofh.it> (permalink)
References	<tIspI-2kb-17@gated-at.bofh.it> <tIspL-2kb-81@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Thu, May 18, 2017 at 02:00:43PM +0200, Miroslav Benes wrote:
> @@ -591,3 +591,19 @@ void klp_send_fake_signal(void)
>  	}
>  	read_unlock(&tasklist_lock);
>  }
> +
> +/*
> + * Drop TIF_PATCH_PENDING of all tasks on admin's request. This forces an
> + * existing transition to finish.
> + */
> +void klp_unmark_tasks(void)
> +{
> +	struct task_struct *g, *task;
> +
> +	pr_warn("all tasks marked as migrated on admin's request\n");
> +
> +	read_lock(&tasklist_lock);
> +	for_each_process_thread(g, task)
> +		klp_update_patch_state(task);
> +	read_unlock(&tasklist_lock);
> +}

Should this also force the idle tasks to transition?

-- 
Josh

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Re: [PATCH 3/3] livepatch: force transition process to finish Josh Poimboeuf <jpoimboe@redhat.com> - 2017-05-26 19:50 +0200
  Re: [PATCH 3/3] livepatch: force transition process to finish Miroslav Benes <mbenes@suse.cz> - 2017-05-29 11:30 +0200

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