* [sh] A possible problem in start_secondary()
@ 2013-06-28 12:26 Kirill Tkhai
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From: Kirill Tkhai @ 2013-06-28 12:26 UTC (permalink / raw)
To: linux-sh
Hi, Paul,
I found out a possible wrong order of local_irq_enable/set_cpu_online at start_secondary().
If irqs are enabled then cpu can receive a timer interrupt, which can cause softirq action.
If we are waking softirq thread on offline cpu, select_task_rq() chooses any active cpu and changes
affinity. So, possible bound softirq thread will change his affinity.
I had this problem on old kernel version on sparc. Maybe, it will be useful for you.
Regards,
Kirill
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2013-06-28 12:26 [sh] A possible problem in start_secondary() Kirill Tkhai
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