From owner-cvs-all  Sun Oct 10  9:13:26 1999
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To: Peter Wemm <peter@netplex.com.au>
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 
In-reply-to: Your message of "Mon, 11 Oct 1999 00:06:54 +0800."
             <19991010160654.642ED1CC6@overcee.netplex.com.au> 
Date: Sun, 10 Oct 1999 18:10:05 +0200
Message-ID: <15397.939571805@critter.freebsd.dk>
From: Poul-Henning Kamp <phk@critter.freebsd.dk>
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In message <19991010160654.642ED1CC6@overcee.netplex.com.au>, Peter Wemm writes
:
>"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 ?

--
Poul-Henning Kamp             FreeBSD coreteam member
phk@FreeBSD.ORG               "Real hackers run -current on their laptop."
FreeBSD -- It will take a long time before progress goes too far!


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