From owner-freebsd-stable@FreeBSD.ORG  Mon Aug 27 09:19:58 2012
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From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@des.no>
To: Sergey Kandaurov <pluknet@freebsd.org>
References: <CALazp+VajMK8FgqJSr5KRB3y2bpH=ZxL2PNLCqPrKD34LM+Vqw@mail.gmail.com>
	<CAE-mSOJWWELwi=gduOOrwfGUrmox1sy8PSm=CXgZ45xLNu78cA@mail.gmail.com>
Date: Mon, 27 Aug 2012 11:19:56 +0200
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	(Sergey Kandaurov's message of "Mon, 27 Aug 2012 12:26:49 +0400")
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Cc: OriS <site.freebsd@orientalsensation.com>, freebsd-stable@freebsd.org
Subject: Re: Weird message in dmesg
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Sergey Kandaurov <pluknet@freebsd.org> writes:
> Index: /usr/src/sys/vm/swap_pager.c
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
> --- /usr/src/sys/vm/swap_pager.c        (revision 239722)
> +++ /usr/src/sys/vm/swap_pager.c        (working copy)
> @@ -2135,7 +2135,7 @@ swapon_check_swzone(unsigned long npages)
>         if (npages > maxpages / 2) {
>                 printf("warning: total configured swap (%lu pages) "
>                     "exceeds maximum recommended amount (%lu pages).\n",
> -                   npages, maxpages);
> +                   npages, maxpages / 2);
>                 printf("warning: increase kern.maxswzone "
>                     "or reduce amount of swap.\n");
>                 return (-1);

Correct.  The theoretical maximum is maxpages, but due to fragmentation,
you can run out of space well before that.

DES
--=20
Dag-Erling Sm=C3=B8rgrav - des@des.no