Re: [uml-user] per-instance tmpfs backed memory file

[Richard W. <ric...@gm...>]

On Fri, Aug 14, 2015 at 8:35 PM, Jon Foster
<jon...@jf...> wrote:
> I'm kind of new to the UML thing. I've read that every instance of UML
> creates a temp file that represents the RAM of that instance. Its
> obvious that putting that in a "tmpfs" would be very good, but I don't
> want to mount a tmpfs on "/tmp", its used by too many other things and
> the size restriction would cause problems.
>
> I've read a "per-instance" tmpfs can be setup... but nowhere have I seen
> how that's done. There doesn't appear to be any CLI switches for telling
> UML where to put the temp file and $TMPDIR doesn't seem to do anything
> for it.
>
> I'm running stock Debian 7 64bit on Intel Xeons, with their supplied UML
> packages. The UML kernel version is 3.2.54.
>
> How can I tell UML to put its temp file somewhere else?

UML checks the environment variables TMP, TEMP and TEMPDIR.
Recent UML kernels use /dev/shm.

-- 
Thanks,
//richard