Some platform have firmware that violates UEFI spec and access boot service code or data segments after the system has called Exit Boot Services. The call to efi_reserve_boot_services in setup_arch is a work around to avoid using boot service memory until after the kernel has done Set Virtual Map. However, this reservation fragments memory which can cause large allocations early in boot (e.g. crash kernel) to fail. This patch set extends the add_efi_memmap with an optional argument to specify that firmware "correctly" doesn't resuse boot services memory after Exit Boot Services. With this information, setup_arch avoids calling efi_reserve_boot_services and fragmenting memory. Jerry Hoemann (3): efi: Early use of boot service memory x86: avoid efi_reserve_boot_services x86, efi: Early use of boot service memory Documentation/kernel-parameters.txt | 8 ++++++++ arch/x86/kernel/setup.c | 2 +- arch/x86/platform/efi/efi.c | 13 +++++++++++-- include/linux/efi.h | 1 + 4 files changed, 21 insertions(+), 3 deletions(-) -- 1.7.11.3 -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
