Re: [uml-user] virtual swap

[Jeff D. <jd...@ka...>]

sh...@sd... said:
> It is not dynamic.  I want to allocate or free memory to the uml
> depending on  the host load.  It is very easy for the host to tell the
> uml os to swapoff  ubd??  with a non-interactive ssh command with
> key-based authentication.  Again that leads to the problem of making
> uml increase swap  by identifying  new ubd?? devices.   Maybe i have
> to use the plain old ramdisks of 4MB  formatted as ext2 or something.

Ok, so you want a cheesy way to do pluggable memory?

You can make a number of tmpfs ubd devices, and use the mconsole to plug
them into a UML (and ssh the swapon) and unplug them (after ssh-ing the 
swapoff) as needed.

The problem is that swapoff might fail if there's not enough memory for
the UML to pull everything off that swap device and release it.

				Jeff