On 09/12/2012 10:35 AM, Dave Young wrote: > On 09/07/2012 04:56 PM, Dave Young wrote: >> >> I did some digging about the efi boot kdump in slackware with kernel >> from latest linus tree. I'm surprise that kdump works even without these >> "noefi" and "acpi_rsdp=" >> >> With fedora 17 3.4.3 kernel passing "acpi_rsdp=" is enough for kdump >> kernel booting. >> >> Actually in x86 setup code if bootloader do not pass correct efi_info in >> boot_params efi_enabled will be set to 0 automaticlly. >> >> So as for this patch 'noefi' is not needed. >> >> I will do more testing to see why linus tree works without "acpi_rsdp=" >> > > There's probably some efi changes between 3.4.3 - 3.6.0-rc4 cause this > works. I have not got time to bisect it. During recent test, I found I mistakenly used wrong kernel config without CONFIG_EFI in 1st kernel for testing. acpi_rsdp= is still needed. Just resent the v2 patch, please help to review. -- Thanks Dave
