This version also passes repeated iterations of: # echo 0 | tee /sys/devices/system/cpu/cpu*/online # echo 1 | tee /sys/devices/system/cpu/cpu*/online
Some of the time taken in the offline cycle may be a more than O(N) chasing of IRQs onto an ever smaller available set of online cpus. There are over 4000 lines like this: [ 218.220045] Broke affinity for irq 66 on the console for each offline pass. Also a couple of these: [ 221.951171] IRQ fixup: irq 68 move in progress, old vector 79 for each pass offlining all but one cpu. Tested-by: Tony Luck <[email protected]> -Tony
