On Thu, Sep 06, 2012 at 10:58:23AM +0800, Dave Young wrote: [..] > > Also, what's the corelation of efi and acpi_rsdp. Is acpi_rsdp required > > only on EFI boot or in general it is required? If it is required in > > general, why kdump works currently. > > > Hi, here is the background of this issue: > http://lists.infradead.org/pipermail/kexec/2010-March/003889.html Ok, looks like this is EFI specific. So keeping noefi and acpi_rsdp together makes sense. Thanks Vivek