Date: Mon, 20 Jan 2003 11:09:36 -0800 From: David Schultz <dschultz@uclink.Berkeley.EDU> To: Mark Santcroos <marks@ripe.net> Cc: hackers@FreeBSD.ORG Subject: Re: nswap Message-ID: <20030120190936.GA3192@HAL9000.homeunix.com> In-Reply-To: <20030120145205.GA4911@laptop.6bone.nl> References: <20030117000917.GA7277@laptop.6bone.nl> <20030117232729.GA5908@HAL9000.homeunix.com> <20030120145205.GA4911@laptop.6bone.nl>
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Thus spake Mark Santcroos <marks@ripe.net>: > On Fri, Jan 17, 2003 at 03:27:29PM -0800, David Schultz wrote: > > Thus spake Mark Santcroos <marks@ripe.net>: > > > in <sys/systm.h>: > > > extern int nswap; /* size of swap space */ > > > > > > in <vm/vm_swap.c>: > > > static int nswap; /* first block after the interleaved devs */ > > > > > > Is the extern pointing to this variable? (It seems so, don't see any other > > > such variable in the three) > > > If so, is there any problem with making nswap non-static? > > > > It's a constant that is only relevant to the management of the > > swap allocation bitmap, so it is properly static. It shouldn't be > > declared in sys/systm.h. > > I need to get access to the swap interface. More precisely, I want to turn > it off. > > Either some of the values and functions need to be made global or the > interface should be changed. > > I need this for software suspending on which I am working. (Page in processes > and turn off swap devices before I write out the memory to it) > > Is it worth my time to produce patches that change the swapoff interface? What exactly do you need to change about the swapoff interface? Unless you're trying to write a module, anything that's going to be invasive into the swap subsystem's data structures probably belongs in vm_swap.c. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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