I have the problem too on ubuntu 16.04. To reproduce:
sudo lsmod | grep brd : (nothing) : it is builtin sudo modprobe brd rd_size=123456 sudo mkfs.ext4 /dev/ram0 sudo mount /dev/ram0 /var/cache/ramdisk/ df -m | grep ramdisk : /dev/ram0 58 2 53 3% /var/cache/ramdisk -> useless Regards. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1593293 Title: brd module compiled as built-in Status in linux package in Ubuntu: Triaged Bug description: Block RAM disk module (brd, CONFIG_BLK_DEV_RAM) compiled as 'y', that means it is 'built-in' and can not be unloaded or loaded with different parameters. This render module completely useless because user can not anymore change it size. Please change it back to 'm' (module) to allow users use this module. Affected kernels (so far): Xenial, Yakkety (4.4). To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1593293/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
