On Mon, 2010-08-09 at 12:53 -0500, Nathan Fontenot wrote: > This set of patches de-couples the idea that there is a single > directory in sysfs for each memory section. The intent of the > patches is to reduce the number of sysfs directories created to > resolve a boot-time performance issue. On very large systems > boot time are getting very long (as seen on powerpc hardware) > due to the enormous number of sysfs directories being created. > On a system with 1 TB of memory we create ~63,000 directories. > For even larger systems boot times are being measured in hours. Hi Nathan, The set is looking pretty good to me. We _might_ want to up the ante in the future and allow it to be even more dynamic than this, but this looks like a good start to me. BTW, have you taken a look at what the hotplug events look like if only a single section (not filling up a whole block) is added? Feel free to add my: Acked-by: Dave Hansen <dave@xxxxxxxxxxxxxxxxxx> -- Dave -- 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/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>