[HEADS-UP] Rawhide: /tmp is now on tmpfs

Simo Sorce simo at redhat.com
Thu May 31 13:38:39 UTC 2012

On Thu, 2012-05-31 at 02:40 +0200, Lennart Poettering wrote:
> Heya!
> Please be aware that since the most recent systemd uploads /tmp is now
> in tmpfs by default in Rawhide/F18.
> For details please see this feature page:
> https://fedoraproject.org/wiki/Features/tmp-on-tmpfs
> If you have an explicit /tmp entry in fstab things should continue to
> work the same as before. If you don't then you will now get a tmpfs on
> /tmp by default.
> This will most likely lead to a problem or two with software that isn't
> happy about /tmp being small. We have created a tracker bug to keep
> track of this:
> https://bugzilla.redhat.com/show_bug.cgi?id=826015
> If you have identified a bug that is triggered by /tmp being on tmpfs
> now, please add it to this tracker bug! 
> For a bit of background on all of this and recommendations for
> developers, please see:
> http://0pointer.de/blog/projects/tmp.html

Lennart is there any smarts about it based on available RAM ?
I regularly install VMs with < 1GiB of RAM and /tmp in RAM would make
them unusable.
On a development laptop with 4GiB of RAM and many VMs I would still
find /tmp in RAM a bit of a stretch, but whatever.

So is there any smarts there that disable this feature when there is
little RAM available from the get go ?


Simo Sorce * Red Hat, Inc * New York

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