On Fri, Mar 09, 2007 at 05:31:50PM -0300, Alexandre Moreira wrote:
> Please excuse me (and explain) if this question is just stupid but,
> 
> I just noticed I have a 252Mb tmpfs on /dev/shm just sitting there
> with no use, and I can see that it is my fstab which is mounting it.
> 
> Why is that useful ? Is it wasting those 252Mb of ram by being mounted
> or will the kernel use this space if it ever needs to ?

You don't waste any space by using tmpfs. Contrary to a ramdisk, space can be
allocated dynamically, there is no underlying block device (just like
initramfs compared to initrd).  Infrequently accessed data will be swapped
out.

Jürgen

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