Commit 26ff6ad9 authored Sep 16, 2005 by Srivatsa Vaddagiri Committed by Linus Torvalds Sep 17, 2005

[PATCH] CPU hotplug breaks wake_up_new_task



Fix a problem wherein a new-born task is added to a dead CPU.

Signed-off-by: Srivatsa Vaddagiri <vatsa@in.ibm.com>
Acked-by: Nick Piggin <nickpiggin@yahoo.com.au>
Acked-by: Shaohua Li <shaohua.li@intel.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

parent fa72e26a

kernel/fork.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -1062,7 +1062,8 @@ static task_t *copy_process(unsigned long clone_flags,
		* parent's CPU). This avoids alot of nasty races.
		*/
		p->cpus_allowed = current->cpus_allowed;
		if (unlikely(!cpu_isset(task_cpu(p), p->cpus_allowed)))
		if (unlikely(!cpu_isset(task_cpu(p), p->cpus_allowed) \|\|
		!cpu_online(task_cpu(p))))
		set_task_cpu(p, smp_processor_id());

		/*