From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Rafael J. Wysocki" <rjw@sisk.pl>
Subject: Re: [PATCH] swswsup: return correct load_image error
Date: Fri, 24 Mar 2006 16:05:33 +0100
References: <200603200234.01472.kernel@kolivas.org> <200603241600.56144.kernel@kolivas.org> <200603241617.24434.kernel@kolivas.org>
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To: Con Kolivas <kernel@kolivas.org>
Cc: linux list <linux-kernel@vger.kernel.org>, ck list <ck@vds.kolivas.org>, Andrew Morton <akpm@osdl.org>, Pavel Machek <pavel@ucw.cz>, linux-mm@kvack.org
List-ID: <linux-mm.kvack.org>

On Friday 24 March 2006 06:17, Con Kolivas wrote:
> > On Tuesday 21 March 2006 10:22, Rafael J. Wysocki wrote:
> > > Basically, yes.  swsusp.c and snapshot.c contain common functions,
> > > disk.c and swap.c contain the code used by the built-in swsusp only,
> > > and user.c contains the userland interface.  If you want something to
> > > be run by the built-in swsusp only, place it in disk.c.
> 
> Would this patch suffice?

I'd change one thing (please see below).

> ---
> Swsusp reclaims a lot of memory during the suspend cycle and can benefit
> from the aggressive_swap_prefetch mode immediately upon resuming.
> 
> Signed-off-by: Con Kolivas <kernel@kolivas.org>
> ---
>  kernel/power/disk.c |    5 ++++-
>  1 files changed, 4 insertions(+), 1 deletion(-)
> 
> Index: linux-2.6.16-mm1/kernel/power/disk.c
> ===================================================================
> --- linux-2.6.16-mm1.orig/kernel/power/disk.c	2006-03-24 15:48:14.000000000 +1100
> +++ linux-2.6.16-mm1/kernel/power/disk.c	2006-03-24 16:15:05.000000000 +1100
> @@ -19,6 +19,7 @@
>  #include <linux/fs.h>
>  #include <linux/mount.h>
>  #include <linux/pm.h>
> +#include <linux/swap-prefetch.h>
>  
>  #include "power.h"
>  
> @@ -138,8 +139,10 @@ int pm_suspend_disk(void)
>  			unprepare_processes();
>  			return error;
>  		}
> -	} else
> +	} else {
>  		pr_debug("PM: Image restored successfully.\n");
> +		aggressive_swap_prefetch();
> +	}
>  
>  	swsusp_free();

I'd put aggressive_swap_prefetch() here.  Before swsusp_free() there may be no
room for the prefetched pages.  [I should have noticed it earlier.  _This_ must
have been the problem last time I tested it.]

>   Done:
> 
> 

Greetings,
Rafael

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