forked from luck/tmp_suning_uos_patched
sparc: Touch NMI watchdog when walking cpus and calling printk
With the increase in number of CPUs calls to functions that dump output to console (e.g., arch_trigger_all_cpu_backtrace) can take a long time to complete. If IRQs are disabled eventually the NMI watchdog kicks in and creates more havoc. Avoid by telling the NMI watchdog everything is ok. Signed-off-by: David Ahern <david.ahern@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -287,6 +287,8 @@ void arch_trigger_all_cpu_backtrace(bool include_self)
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printk(" TPC[%lx] O7[%lx] I7[%lx] RPC[%lx]\n",
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gp->tpc, gp->o7, gp->i7, gp->rpc);
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}
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touch_nmi_watchdog();
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}
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memset(global_cpu_snapshot, 0, sizeof(global_cpu_snapshot));
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@ -362,6 +364,8 @@ static void pmu_snapshot_all_cpus(void)
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(cpu == this_cpu ? '*' : ' '), cpu,
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pp->pcr[0], pp->pcr[1], pp->pcr[2], pp->pcr[3],
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pp->pic[0], pp->pic[1], pp->pic[2], pp->pic[3]);
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touch_nmi_watchdog();
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}
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memset(global_cpu_snapshot, 0, sizeof(global_cpu_snapshot));
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