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authorRusty Russell <rusty@rustcorp.com.au>2008-11-25 09:59:20 +1030
committerIngo Molnar <mingo@elte.hu>2008-11-26 07:58:29 +0100
commit1224e376f2a7e3c7ab19ef37099a78597978a696 (patch)
tree244bbf8c345ac70487ddcb6283c7895f6cbdb7dd /arch/ia64
parent3d8cbdf8650f44d95333ca645d950832a0653f35 (diff)
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sched: avoid stack var in move_task_off_dead_cpu, fix
Impact: locking fix We can't call cpuset_cpus_allowed_locked() with the rq lock held. However, the rq lock merely protects us from (1) cpu_online_mask changing and (2) someone else changing p->cpus_allowed. The first can't happen because we're being called from a cpu hotplug notifier. The second doesn't really matter: we are forcing the task off a CPU it was affine to, so we're not doing very well anyway. So we remove the rq lock from this path, and all is good. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Acked-by: Mike Travis <travis@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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