On Tue, Jan 23, 2018 at 09:31:16AM -0800, Linus Torvalds wrote: > On Tue, Jan 23, 2018 at 9:09 AM, Kirill A. Shutemov > <[email protected]> wrote: > > > > But if the bootloader put the kernel above 4G (not sure if anybody does > > this), we would lose control as soon as paging is disabled, because the > > code becomes unreachable to the CPU. > > I do wonder if we need this. Why would a bootloader ever put the data > above 4G? Does this really happen? Wouldn't it be easier to just say > "bootloaders better put the kernel in the low 4G"?
I don't know much about bootloaders, but do we even have such guarantee for in-kernel bootloader -- kexec? -- Kirill A. Shutemov
