/tmp on tmpfs

[Dave Jones]

On Mon, Apr 02, 2012 at 06:34:59PM -0400, Przemek Klosowski wrote:
 > On Mon, Apr 02, 2012 at 08:32:56PM +0200, Miloslav Trmač wrote:
 > >* #834 F18 Feature: /tmp on tmpfs -
 > >   http://fedoraproject.org/wiki/Features/tmp-on-tmpfs  (mitr, 17:40:06)
 > >   * AGREED: tmp-on-tmpfs is accepted (+5 -3)  (mitr, 18:12:52)
 > 
 > The wiki page says:
 >   By implementing this we, by default, generate less IO on disks. This
 >   increases SSD lifetime, saves a bit of power and makes things a bit
 >   faster.
 > 
 > What about the memory pressure? with on-disk /tmp, the buffer cache
 > prevents excessive writing if there's memory to spare, but the
 > system still works when memory is used up. What happens with tmpfs?

tmpfs contents are pageable, and will be swapped out if necessary.

	Dave