Date: Mon, 11 Oct 1999 00:19:56 +0800 From: Peter Wemm <peter@netplex.com.au> To: Poul-Henning Kamp <phk@critter.freebsd.dk> Cc: "Daniel C. Sobral" <dcs@newsguy.com>, cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/vm vm_swap.c Message-ID: <19991010161956.453321CC6@overcee.netplex.com.au> In-Reply-To: Your message of "Sun, 10 Oct 1999 18:10:05 %2B0200." <15397.939571805@critter.freebsd.dk>
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Poul-Henning Kamp wrote:
> In message <19991010160654.642ED1CC6@overcee.netplex.com.au>, Peter Wemm writ
es
> :
> >"Daniel C. Sobral" wrote:
> >> Poul-Henning Kamp wrote:
> >> >
> >> > Unless somebody else beats me to it or explains why we need to
> >> > keep it, /dev/drum is now scheduled for demolition.
> >>
> >> /me trembles at the sight of vikings and their bloody axes as the
> >> year come to an end...
> >
> >The only thing of the "swap device" that's actually used is the strategy
> >routine which does interleaving for the higher layers. It's really not
> >useable as anything else as this strategy routine doesn't actually work for
> >normal device access. libkvm doesn't use it, at least not for a very long
> >time. IMHO, the strategy routine should be moved elsewhere for the VM swap
> >code to use as a subroutine and the whole "device" should be deep-six'ed.
>
> But isn't this really just a "striping" function which could be done
> equally well by ccd or vinum ?
Not really. swapping onto a vinum, ccd, etc adds all sorts of new
low-memory conditions that we can do without.
Cheers,
-Peter
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