> Many years ago, we created an application that would attach a R/W DCSS
>to use for extra memory. As the demands for more memory increased,
>subsequent DCSS space would be attached. We used to attach existing DCSS
>space (such as VTAM) for testing (no, this would no trash the real VTAM
>segment, we'd just ATTACH the DCSS in R/W mode, thus extending our
virtual
>machine storage dynamically). I was wondering if Linux on 390 could be
>taught how to do this. Can Linux on 390 handle "holes" in it's address
>space?
Memory hotplug would be nice. I would prefer the #cp def store command to
change the storage size
as soon as Linooks supports memory hotplug/remove and as soon as VM folks
do fix the need to
clear the storage and reset CPU states on changing the storage size.
DCSS would be an alternate way, but in case you want that real flexible
(example in 1meg steps), you
would need a lot of DCSSes because those are so far not relocateable and
cannot be mapped multiple
times by the same guest. These restrictions make the "DCSS extends memory"
idea unattractive.
with kind regards
Carsten Otte
--
I saw screens of green, red messages too, then came blue, shubidu
And i think to myself, what a wonderful world
Arty Ecock <[EMAIL PROTECTED]>
Sent by: Linux on 390 Port <[EMAIL PROTECTED]>
02/03/2004 10:15 PM
Please respond to Linux on 390 Port
To: [EMAIL PROTECTED]
cc:
Subject: Using DCSS for extra memory
Hi,
Many years ago, we created an application that would attach a R/W DCSS
to use for extra memory. As the demands for more memory increased,
subsequent DCSS space would be attached. We used to attach existing DCSS
space (such as VTAM) for testing (no, this would no trash the real VTAM
segment, we'd just ATTACH the DCSS in R/W mode, thus extending our virtual
machine storage dynamically). I was wondering if Linux on 390 could be
taught how to do this. Can Linux on 390 handle "holes" in it's address
space?
Cheers,
Arty
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