linux-kernel - Re: [PATCH 0/4] Container Freezer: Reuse Suspend Freezer

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Date:	Tue, 8 Jul 2008 12:31:50 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Matt Helsley <matthltc@...ibm.com>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Linux Containers <containers@...ts.linux-foundation.org>,
	Paul Menage <menage@...gle.com>,
	Linux-Kernel <linux-kernel@...r.kernel.org>,
	Pavel Machek <pavel@....cz>,
	linux-pm@...ts.linux-foundation.org
Subject: Re: [PATCH 0/4] Container Freezer: Reuse Suspend Freezer

Hi, could I make brief questions ?

On Mon, 07 Jul 2008 15:58:23 -0700
Matt Helsley <matthltc@...ibm.com> wrote:
> to get status of the freezer subsystem :
> 
>    # cat /containers/0/freezer.state
>    RUNNING
> 
> to freeze all tasks in the container :
> 
>    # echo FROZEN > /containers/0/freezer.state
>    # cat /containers/0/freezer.state
>    FREEZING
>    # cat /containers/0/freezer.state
>    FROZEN
> 
I'm just curious.

1. When we see FREEZING and have to retry ?
   While there are some threads which wait for some event ?

2. What happens when FROZEN threads are moved to other group ?
   Can we move them ?
   Can we wake them up (if it can be moved) ?
   What operations are allowed to frozen threads ?

Thanks,
-Kame

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