Messages in this thread | | | From | "Luck, Tony" <> | Date | Tue, 5 Aug 2008 07:59:48 -0700 | Subject | RE: [BISECTION RESULT] sched: revert cpu_clock to pre-27ec4407790d075c325e1f4da0a19c56953cce23 state |
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+u64 sched_clock_cpu(int cpu) +{ + if (unlikely(!sched_clock_running)) + return 0; + + return sched_clock(); +}
This looks like it will solve the issue on the boot cpu. It leaves a potential hole as we bring up other cpus if[1] there are any printk() calls before they get to cpu_init() to initialize ar.kr3. This code path is all under arch/ia64 though ... so if we shoot ourselves in the foot, it will be our own fault.
-Tony
[1] Currently there is just one Dprintk() call in this path at the start of start_secondary() ... I could put it inside #ifndef CONFIG_PRINTK_TIME so as not to surprise anyone that enabled it.
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