linux-kernel - Re: [PATCH 1/2] PM / Hibernate: Improve comments in hibernate_preallocate

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Date:	Mon, 4 Oct 2010 19:56:18 +0200
From:	Pavel Machek <pavel@....cz>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Linux-pm mailing list <linux-pm@...ts.linux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] PM / Hibernate: Improve comments in
 hibernate_preallocate_memory()

On Wed 2010-09-15 00:22:29, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rjw@...k.pl>
> Subject: PM / Hibernate: Improve comments in hibernate_preallocate_memory()
> 
> One comment in hibernate_preallocate_memory() is wrong, so fix it and
> add one more comment to clarify the meaning of the fixed one.
> 
> Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>

ACK.


> ---
>  kernel/power/snapshot.c |    6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> Index: linux-2.6/kernel/power/snapshot.c
> ===================================================================
> --- linux-2.6.orig/kernel/power/snapshot.c
> +++ linux-2.6/kernel/power/snapshot.c
> @@ -1318,12 +1318,14 @@ int hibernate_preallocate_memory(void)
>  
>  	/* Compute the maximum number of saveable pages to leave in memory. */
>  	max_size = (count - (size + PAGES_FOR_IO)) / 2 - 2 * SPARE_PAGES;
> +	/* Compute the desired number of image pages specified by image_size. */
>  	size = DIV_ROUND_UP(image_size, PAGE_SIZE);
>  	if (size > max_size)
>  		size = max_size;
>  	/*
> -	 * If the maximum is not less than the current number of saveable pages
> -	 * in memory, allocate page frames for the image and we're done.
> +	 * If the desired number of image pages is at least as large as the
> +	 * current number of saveable pages in memory, allocate page frames for
> +	 * the image and we're done.
>  	 */
>  	if (size >= saveable) {
>  		pages = preallocate_image_highmem(save_highmem);
> 
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