On Wed, 11 Jun 2014, Zhang Zhen wrote: > Hi, > > Now we can hot-add memory by > > % echo start_address_of_new_memory > /sys/devices/system/memory/probe > > Then, [start_address_of_new_memory, start_address_of_new_memory + > memory_block_size] memory range is hot-added. > > But we can only hot-add *one section one time* by this way. > Whether we can add an argument on behalf of the count of the sections to add ? > So we can can hot-add *several sections one time*. Just like: >
Not necessarily true, it depends on sections_per_block. Don't believe Documentation/memory-hotplug.txt that suggests this is only for powerpc, x86 and sh allow this interface as well. > % echo start_address_of_new_memory count_of_sections > > /sys/devices/system/memory/probe > > Then, [start_address_of_new_memory, start_address_of_new_memory + > count_of_sections * memory_block_size] memory range is hot-added. > > If this proposal is reasonable, i will send a patch to realize it. > The problem is knowing how much memory is being onlined so that you can definitively determine what count_of_sections should be. The number of pages per memory section depends on PAGE_SIZE and SECTION_SIZE_BITS which differ depending on the architectures that support this interface. So if you support count_of_sections, it would return errno even though you have onlined some sections. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
