On Tue, Jan 14, 2014 at 06:05:15AM -0500, Prarit Bhargava wrote: [..] > >>> As mentioned, self-NAK. I have seen a system that I needed to specify > >>> memmap=exactmap & had hotplug memory. I will only keep the acpi_no_memhotplug > >>> option in the next version of the patch. > >> > >> > >> Your following first patch is simply and makes sense. > >> > >> http://marc.info/?l=linux-acpi&m=138922019607796&w=2 > >> > > > > In this option, it also requires changing kexec-tools to specify the new > > option for kdump. It won't be simpler. > > It will be simpler for the kernel and those of us who have to debug busted e820 > maps ;) > > Unfortunately I may not be able to give you the automatic disable. I did > contemplate adding a !is_kdump_kernel() to the ACPI memory hotplug init call, > but it seems like that is unacceptable as well. I think everybody agrees that there has to be a stand alone command line option to disable memory hotplug. Whether to tie it into memmap=exactmap and mem=X is the contentious bit. So I would suggest that just post a patch to disable memory hotplut using a command line and later more patches can go in if people strongly feel the need to tie it into memmap=exactmap. In the mean time, we will modify /etc/sysconfig/kdump to pass acpi_no_memhotplug so that user does not have to worry about passing this parameter and kexec-tools will not have to be modified either. Thanks Vivek -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>