linux-kernel - Re: [PATCH 2/8] Make process freezer reentrant

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Message-ID: <20070405095301.GB609@tv-sign.ru>
Date:	Thu, 5 Apr 2007 13:53:01 +0400
From:	Oleg Nesterov <oleg@...sign.ru>
To:	Gautham R Shenoy <ego@...ibm.com>
Cc:	akpm@...ux-foundation.org, paulmck@...ibm.com,
	torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org,
	vatsa@...ibm.com, "Rafael J. Wysocki" <rjw@...k.pl>, mingo@...e.hu,
	dipankar@...ibm.com, dino@...ibm.com,
	masami.hiramatsu.pt@...achi.com
Subject: Re: [PATCH 2/8] Make process freezer reentrant

On 04/02, Gautham R Shenoy wrote:
>
>  int freeze_processes(unsigned long freeze_event)
>  {
>  	unsigned int nr_unfrozen;
> -
> +	int ret = 0;
> +	mutex_lock(&freezer_mutex);
> +	if (system_freeze_event_mask & freeze_event)
> +		goto done;

I am not sure this is correct. Suppose that system_freeze_event_mask == FE_SUSPEND,
now freeze_processes(FE_ALL) returns success. Shouldn't we return an error?

Oleg.

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