Linux x86/x86_64 Will Now Always Reserve The First 1MB Of RAM Written by Michael Larabel in Linux Kernel on 6 June 2021 at 08:01 AM EDT. 48 Comments The Linux x86/x86_64 kernel code already had logic in place for reserving portions of the first 1MB of RAM to avoid the BIOS or kernel potentially clobbering that space among other reasons while now Linux 5.13 is doing away with that "wankery" and wil