Re: [Patch 16/21] Wait for threads to freeze

[Oleg Nesterov]

On 12/14, Suzuki K. Poulose wrote:
>
> + * zero_thread_state :
> + * For threads, which are not frozen, we cannot capture the register state.

Indeed, but

> +		if (!tinfo->frozen)
> +			zero_thread_state(tinfo);

Again, we can race with TASK_STOPPED/SIGCONT. And
is_task_frozen_enough() thins task_is_stopped_or_traced() is fine.

Oleg.

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