Re: [RFC PATCH 0/4] (Take 2): transcendent memory ("tmem") for Linux

Rik van Riel
2009-07-07T17:28:50Z

Dan Magenheimer wrote:

> "Preswap" IS persistent, but for various reasons may not always be
> available for use, again due to factors that may not be visible to the
> kernel (but, briefly, if the kernel is being "good" and has shared its
> resources nicely, then it will be able to use preswap, else it will not).
> Once a page is put, a get on the page will always succeed.

What happens when all of the free memory on a system
has been consumed by preswap by a few guests?

Will the system be unable to start another guest,
or is there some way to free the preswap memory?