This question originated with a joke between co-workers about increasing performance by moving swap files to a tmpfs. Clearly even if this is possible, it's not a good idea. All I want to know is, can it be done?
I'm currently on Ubuntu 14.04, but I'd imagine the process is similar for most Linux/Unix machines. Here's what I'm doing:
> mkdir /mnt/tmp > mount -t tmpfs -o size=10m tmpfs /mnt/tmp > dd if=/dev/zero of=/mnt/tmp/swapfile bs=1024 count=10240 > chmod 600 /mnt/tmp/swapfile > mkswap /mnt/tmp/swapfile # So far, so good! > swapon /mnt/tmp/swapfile swapon: /mnt/tmp/swapfile: swapon failed: Invalid argument
So, on either linux or unix (I'm interested in any solution) can you somehow set up swap on a file/partition residing in ram? Is there a way around the
Invalid argument error I'm getting above?
Again, just want to emphasize that I'm not expecting this to be a solution to a real-world problem. Just a fun experiment, I guess.