Re: -mm swsusp: do not default to platform/firmware

[Nigel Cunningham]

Hi.

On Thu, 2004-07-29 at 09:43, Pavel Machek wrote:
> +I did found some kernel threads don't do it, and they don't freeze, and

"I found... threads that don't..."

> +so the system can't sleep. Is this a known behavior?
> +
> +A: All such kernel threads need to be fixed, one by one. Select place
> +where it is safe to be frozen (no kernel semaphores should be held at
> +that point and it must be safe to sleep there), and add:
> +
> +            if (current->flags & PF_FREEZE)
> +                    refrigerator(PF_FREEZE);
> +

Perhaps you should also add.

If the thread is needed for writing the image to storage, you should
instead set the PF_NOFREEZE process flag when creating the thread.

Regards,

Nigel

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