From owner-freebsd-hackers  Tue Jan 21  1:33: 4 2003
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Date: Tue, 21 Jan 2003 01:33:01 -0800
From: David Schultz <dschultz@uclink.Berkeley.EDU>
To: Mark Santcroos <marks@ripe.net>
Cc: hackers@FreeBSD.ORG
Subject: Re: nswap
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Mail-Followup-To: Mark Santcroos <marks@ripe.net>,
	hackers@FreeBSD.ORG
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Thus spake Mark Santcroos <marks@ripe.net>:
> Yes, that is also what I meant. We now have a swapoff() system call that
> does all the work itself.
> 
> My idea was to split that up:
> 
> /* turn of swap device */
> static int swapoff_one(struct swdevt *sp)
> {
>   /* Do all things that we don't want to know about outside this function
> 	 */
> }
> 
> /* turn off all swap devices */
> int swapoff_all()
> {
>   int index;
> 	struct swdevt *sp;
> 
>   for (sp = swdevt, index = 0; index < nswdev; index++, sp++)
>     swapoff_one(sp);
> }
> 
> So the swapoff() system call would call swapoff_one() and my code in
> kern/kern_swsuspend.c would call swapoff_all().

See swapoff(8), in particular the -a flag.

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