On Thursday, 03/04/2004 at 01:57 CET, Arnd Bergmann <[EMAIL PROTECTED]> wrote: > There is an ongoing discussion about adding support for > hotplugging memory (both adding and removing to/from a > running system) to linux-2.7 and there are patches that > can do this on some other architectures with linux-2.6. > > However, this will not be possible with DCSS segments, > because pages in memory segments do not have a usable storage > key (i.e. referenced/change bits).
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). Alan Altmark Sr. Software Engineer IBM z/VM Development
