Re: [RFC][PATCH 1/3] Freezer: Fix vfork problem

[Oleg Nesterov]

On 02/26, Rafael J. Wysocki wrote:
>
> The changelog explains it pretty well, I hope, but I have one more comment to
> start with.  Namely, in this version of the patch I've added
> 
> +	if (is_user_space(current))
> +		try_to_freeze();
> 
> to freezer_count() instead of just try_to_freeze().  This way kernel threads
> can avoid being frozen where they don't want to.

In that case we should also modify ____call_usermodehelper(), otherwise we have
the same "deadlock" if it is frozen. But this is not so easy to do as I thought
before.

Oleg.

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