On Mon, Nov 22, 2010 at 07:33:51AM +0800, Shaohui Zheng wrote: >On Sun, Nov 21, 2010 at 11:03:45PM +0800, AmÃrico Wang wrote: >> >> >From your documentation above, it looks like you are trying >> to move one CPU between nodes? >Yes, you are correct. With cpu probe/release interface, you can hot-remove a >CPU from a node, and hot-add it to another node. Can I also move the CPU to another node _after_ it is hot-added? Or I have to hot-remove it first and then hot-add it again? >> >> >+ cpu_hpe=on/off >> >+ Enable/disable cpu hotplug emulation with software method. when cpu_hpe=on, >> >+ sysfs provides probe/release interface to hot add/remove cpu dynamically. >> >+ this option is disabled in default. >> >+ >> >> Why not just a CONFIG? IOW, why do we need to make another boot >> parameter for this? >Only the developer or QA will use the emulator, we did not want to change the >default action for common user who does not care the hotplug emulator, so we >use a kernel parameter as a switch. The common user is not aware the existence >of the emulator. > I think it is also useful to other Linux users, e.g. after I boot with "maxcpus=1", I can still bring the rest 3 CPU's back without reboot. Thanks. -- Live like a child, think like the god. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom policy in Canada: sign http://dissolvethecrtc.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>