Re: non volatile ram disk

[Peter Wächtler]

Erez Doron schrieb:
> 
> hi
> 
> I'm looking for a way to make a ramdisk which is not erased on reboot
> this is for use with ipaq/linux.
> 
> i tought of booting with mem=32m and map a block device to the rest of
> the 32M ram i have.
> 
> the probelm is that giving mem=32m to the kernel will cause the kernel
> to map only the first 32m of physical memory to virtual one, so using
> __pa(ptr) on the top 32m causes a kernel oops.
> 
> any idea ?
> 

a MTD is the way to go, which uses the "reserved" mem area. 
I assume that the RAM is battery backed