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Commit e5e5673f authored by Nathan Lynch's avatar Nathan Lynch Committed by Linus Torvalds
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[PATCH] sched: tasks cannot run on cpus onlined after boot 

Commit 5c1e1767 ("sched: force /sbin/init
off isolated cpus") sets init's cpus_allowed to a subset of cpu_online_map
at boot time, which means that tasks won't be scheduled on cpus that are
added to the system later.

Make init's cpus_allowed a subset of cpu_possible_map instead.  This should
still preserve the behavior that Nick's change intended.

Thanks to Giuliano Pochini for reporting this and testing the fix:

http://ozlabs.org/pipermail/linuxppc-dev/2006-December/029397.html



Signed-off-by: default avatarNathan Lynch <ntl@pobox.com>
Acked-by: default avatarIngo Molnar <mingo@elte.hu>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: <stable@kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent c71551ad

kernel/sched.c

+1 −1
Original line number Diff line number Diff line
@@ -6865,7 +6865,7 @@ void __init sched_init_smp(void) 


	lock_cpu_hotplug();

	arch_init_sched_domains(&cpu_online_map);

	cpus_andnot(non_isolated_cpus, cpu_online_map, cpu_isolated_map);

	cpus_andnot(non_isolated_cpus, cpu_possible_map, cpu_isolated_map);

	if (cpus_empty(non_isolated_cpus))

		cpu_set(smp_processor_id(), non_isolated_cpus);

	unlock_cpu_hotplug();