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  Update qmemman.md
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Marek Marczykowski-Górecki 2017-05-06 23:38:03 +02:00
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@ -16,7 +16,7 @@ Rationale
Traditionally, Xen VMs are assigned a fixed amount of memory. It is not the optimal solution, as some VMs may require more memory than assigned initially, while others underutilize memory. Thus, there is a need for solution capable of shifting free memory from VM to another VM.
The [tmem](http://oss.oracle.com/projects/tmem/) project provides a "pseudo-RAM" that is assigned on per-need basis. However this solution has some disadvantages:
The [tmem](https://oss.oracle.com/projects/tmem/) project provides a "pseudo-RAM" that is assigned on per-need basis. However this solution has some disadvantages:
- It does not provide real RAM, just an interface to copy memory to/from fast, RAM-based storage. It is perfect for swap, good for file cache, but not ideal for many tasks.
- It is deeply integrated with the Linux kernel. When Qubes will support Windows guests natively, we would have to port *tmem* to Windows, which may be challenging.