> Just a idea, but what if we put the "back link" on the DASD page (I
> don't
> know much about the structure of the page, but I think there's a header
> there somewhere), not on central memory? We would only have to read the
> back
> link on the page header on DASD and we would know where the page is,
> migrate
> it and release the disk.

I think that would probably break NSS/DCSS processing, since those can appear 
in multiple address spaces, and you'd need to fix all those references too. 

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