On Tue, Oct 25, 2011 at 07:17:17PM +0200, Michael Holzheu wrote: > Hello Simon and Vivek, > > For s390 we currently use /proc/iomem for defining the memory layout in > the kexec elfcore header. Unfortunately this is not correct, when using > memory hotplug. When a memory chunk is set offline (e.g. with "echo > offline > /sys/devices/system/memory/memoryX/state") this is not > reflected in /proc/iomem. > > To fix this I could parse /sys/devices/system/memory and exclude each > memory chunk that in not online from the /proc/iomem info. Do you think > that this approach is fine or is there a better solution? Hi Michael, that sounds like a reasonable approach to me. IIRC, kexec xen on ia64 makes use of an alternate iomem file, and this seems to be another example of /proc/iomem not being the right source of information.
