linux-kernel - Re: [PATCH v9]: Hibernation: fix the number of pages used for hibernate/thaw buffering

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Message-ID: <4F83F202.2080600@debian.org>
Date:	Tue, 10 Apr 2012 10:40:34 +0200
From:	Per Olofsson <pelle@...ian.org>
To:	Bojan Smojver <bojan@...ursive.com>
CC:	"Rafael J. Wysocki" <rjw@...k.pl>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v9]: Hibernation: fix the number of pages used for hibernate/thaw
 buffering

On 2012-04-10 04:47, Bojan Smojver wrote:
> +/*
> + * Number of free pages that are not high.
> + */
> +static unsigned long low_free_pages(void)
> +{
> +	struct zone *zone;
> +	unsigned long free = 0;
> +
> +	for_each_populated_zone(zone)
> +		if (!is_highmem(zone))
> +			free += zone_page_state(zone, NR_FREE_PAGES);
> +	return free;
> +}

Nitpick: it should be faster to calculate "nr_free_pages() -
nr_free_highpages()", at least on systems without high pages. But
perhaps it does not matter.

-- 
Pelle
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