On Thu, Jun 13, 2013 at 03:11:44PM +0800, Li Zefan wrote: > Before moving tasks out of empty cpusets, update_tasks_nodemask() > is called, which calls do_migrate_pages(xx, from, to). Then those > tasks are moved to an ancestor, and do_migrate_pages() is called > again. > > The first time: from = node_to_be_offlined, to = empty. > The second time: from = empty, to = ancestor's nodemask. > > so looks like no pages will be migrated. > > Fix this by: > > - Don't call update_tasks_nodemask() on empty cpusets. > - Pass cs->old_mems_allowed to do_migrate_pages(). > > v4: added comment in cpuset_hotplug_update_tasks() and rephased comment > in cpuset_attach(). > > Signed-off-by: Li Zefan <[email protected]>
Replaced v3 with this one in cgroup/for-3.11-cpuset. Thanks! -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
