Sys V r2 version 2 swap bug

[Phil Chadwick]

System V release 2 version 2 has a new command called swap
to configure extra swap areas into the system on the fly.
I just tried it.  Guess what happened?  "panic: IO err in swap".
Double checked everything and tried again.  Same result.

Then I found something very strange in the swap code in
the file physio.c!  The swap i/o is being done with a

	(*bdevsw[bmajor(swapdev)].d_strategy)(bp)

swapdev is an extern and reflects the device codes for the
*initially* configured swap device.  Now why are they using
the driver for the initially configured swap device to do the
i/o when the swap device may be anything configured into the
system with the swap command?

Has anyone got Sys V r2 v2 to swap on anything but the initially
configured swap device?  Will changing "swapdev" to "dev" fix
the problem?

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Phil Chadwick		  Australia: (07) 2296500
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