[Nouveau] [Bug 76732] Kworker using 100% CPU

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=76732

--- Comment #16 from patrick.clara at gmail.com ---
Samples: 121K of event 'cycles', Event count (approx.): 71741963089
+  64.62%      kworker/1:1  [kernel.kallsyms]        [k] ioread32
+  18.47%      kworker/1:1  [kernel.kallsyms]        [k] native_read_tsc
+  13.71%      kworker/1:1  [kernel.kallsyms]        [k] delay_tsc
+   2.31%          swapper  [kernel.kallsyms]        [k] ioread32
+   0.37%          swapper  [kernel.kallsyms]        [k] intel_idle
+   0.05%      kworker/1:1  [nouveau]                [k] nv94_aux
+   0.02%          swapper  [kernel.kallsyms]        [k] cpuidle_enter_state
+   0.02%          swapper  [kernel.kallsyms]        [k] irq_entries_start
+   0.02%          swapper  [kernel.kallsyms]        [k] _raw_spin_lock
+   0.01%      kworker/1:1  [kernel.kallsyms]        [k] __const_udelay
+   0.01%          swapper  [nouveau]                [k] nve0_gpio_intr
+   0.01%          swapper  [kernel.kallsyms]        [k] menu_select
+   0.01%          swapper  [kernel.kallsyms]        [k]
rcu_eqs_enter_common.isra.48
+   0.01%          swapper  [kernel.kallsyms]        [k] ktime_get
+   0.01%      kworker/1:1  [nouveau]                [k] dcb_gpio_table
+   0.01%      kworker/1:1  [nouveau]                [k] dcb_table
+   0.01%      kworker/1:1  [kernel.kallsyms]        [k] iowrite32
+   0.01%      kworker/1:1  [i2c_algo_bit]           [k] i2c_outb.isra.0
+   0.01%      kworker/1:1  [nouveau]                [k] nouveau_i2c_setscl
+   0.01%          swapper  [kernel.kallsyms]        [k] queue_work_on
+   0.01%          swapper  [kernel.kallsyms]        [k] native_write_msr_safe
+   0.01%          swapper  [kernel.kallsyms]        [k] cpu_startup_entry
+   0.00%      kworker/1:1  [nouveau]                [k] nv_printk_
+   0.00%      kworker/1:1  [kernel.kallsyms]        [k] native_write_msr_safe
+   0.00%      kworker/1:1  [nouveau]                [k] nouveau_bios_rd08
+   0.00%      kworker/1:1  [kernel.kallsyms]        [k] __udelay

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