On Thu, Jan 10, 2013 at 9:01 AM, Vivek Goyal <vgoyal at redhat.com> wrote: > On Thu, Jan 10, 2013 at 08:53:18AM -0800, Yinghai Lu wrote: >> On Thu, Jan 10, 2013 at 6:26 AM, Vivek Goyal <vgoyal at redhat.com> wrote: >> > >> > This happens only in case of kdump and not kexec. In case of kdump >> > we want second kernel to use only selected memory areas. >> > >> > In fact this is one improvement area. Instead of using memmap= entries >> > in kdump case, we should probably modify the e820 map passed in >> > zero page and get rid of memmap= entries. >> >> then how the kdump kernel get saved_max_pfn? >> > > Oh, I forgot about that. May be we can pass saved_max_pfn on command line > instead of passing all memmap= entries. then we create another kernel version/kexec tools dependency. kexec tools need to check kernel version, to see if saved_max_pfn= is supported.
