> If we reuse the movable zone, we should set appropriate size of > mirrored memory region(normal zone) and non-mirrored memory > region(movable zone). In some cases, kernel will take more memory > than user, e.g. some apps run in kernel space, like module. > > I think user can set the size in BIOS interface, right?
Exact methods may vary as different BIOS vendors implement things the way they like (or the way an OEM asks them). In the Intel reference BIOS you can either set an explicit mirror size for each memory controller, or you can have the BIOS look at some EFI boot variables to find a percentage of memory to use spread across all memory controllers. See: https://software.intel.com/sites/default/files/managed/43/6a/Memory%20Address%20Range%20Mirroring%20Validation%20Guide.pdf There are patches to efibootmgr(8) to set/show the EFI variables: git://github.com/rhinstaller/efibootmgr -Tony -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
