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Transcendent memory

Transcendent memory

Posted Jul 22, 2009 12:10 UTC (Wed) by tdz (subscriber, #58733)
Parent article: Transcendent memory

"As an example of how this feature might be used, consider the Linux page cache, which maintains copies of pages from disk files. When memory gets tight, the page cache will start forgetting pages which are clean, but which have not been referenced in the recent past. With transcendental memory, the page cache could, before dropping the pages, attempt to store them into an ephemeral transcendental memory pool."

I don't understand why it is better to move a page to transcendent memory instead of keeping it in the page cache. The same amount of memory is needed in both cases. Can someone enlight me?

Regards, Thomas


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Transcendent memory

Posted Jul 22, 2009 12:14 UTC (Wed) by johill (subscriber, #25196) [Link]

The only difference is who decides to drop it -- if it's in the page cache that decision has to be made by the guest, if it's in the transcendent memory that decision can be made by the host too, if _it_ needs memory.

Transcendent memory

Posted Jul 22, 2009 15:31 UTC (Wed) by tdz (subscriber, #58733) [Link]

Hmm, that makes sense. Thanks for the fast answer.

Regards, Thomas


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