On 06/18/2014 06:52 AM, Clemens Eisserer wrote:
I need a single ramdisk which is a real block device (unlike tmpfs), so I found the ramdisk_size kernel boot parameter. However, after invoking "MAKEDEV ram" I get hundreds of 16mb large ramdisks, instead of a single 4GB large:
Following up to a reply (sorry, missed original message), but I'm not sure that's possible. IIRC the original ramdisk block device was kind of screwy, and I don't think it'll support that much space.
One hack I could think of to get a 4G, in-memory, block device (untested but should work I believe):
- mount a tmpfs a little larger (don't know how much overhead there is so 4100m is a guess): mkdir /srv/foo mount -t tmpfs -o size=4100m tmpfs /srv/foo - create a 4G backing file: dd if=/dev/zero bs=1M count=4K of=/srv/foo/backing.img - attach it to a loopback device: losetup -f --show /srv/foo/backing.img