(4/5/13 4:33 PM), Cody P Schafer wrote: > No off-cpu users of the percpu pagesets exist. > > zone_pcp_update()'s goal is to adjust the ->high and ->mark members of a > percpu pageset based on a zone's ->managed_pages. We don't need to drain > the entire percpu pageset just to modify these fields. Avoid calling > setup_pageset() (and the draining required to call it) and instead just > set the fields' values. > > This does change the behavior of zone_pcp_update() as the percpu > pagesets will not be drained when zone_pcp_update() is called (they will > end up being shrunk, not completely drained, later when a 0-order page > is freed in free_hot_cold_page()). > > Signed-off-by: Cody P Schafer <cody@xxxxxxxxxxxxxxxxxx> NAK. 1) zone_pcp_update() is only used from memory hotplug and it require page drain. 2) stop_machin is used for avoiding race. just removing it is insane. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>