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On Thursday 04 March 2004 17:20, Alan Altmark wrote:
> Not usable in what way, Arnd? �Every page in a DCSS has valid reference
> and change bits in its storage key. �If one or more pages in a DCSS are
> read-only, then a guest may not store into those pages so the change bit
> will never be set. �If it is shared-write, then the change bit will be set
> if anyone changes the page, and ISKE will show that the page has changed
> (no matter who changed it).
I was pretty sure that doing ISKE or RRBE on a DCSS page would always give
you some exception (addressing or specification probably). If that's
not the case, I stand corrected.
A completely different problem is that all DCSS segments reside in VMs
low address space, so you could at most give 2 GB of extra storage
to all your linux guests together, in practice it is probably far less.
Arnd <><
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