On Sat, 2 Jun 2012, Markus Trippelsdorf wrote:
> On 2012.06.01 at 21:40 -0700, Hugh Dickins wrote:
> > 
> > I'm guessing that the few people who see the warning are those running
> > new systemd distros, and that systemd is indeed now making use of the
> > fallocate support we added into tmpfs for it.)
> 
> At least in my case it's nothing that horrible. I'm just setting
> browser.cache.disk.parent_directory to /dev/shm in Firefox. And Firefox
> does indeed use fallocate on its "disk cache" items.

That fits, and it's very helpful to know - thank you.

Hugh