Messages in this thread | | | Date | Sat, 23 Sep 2006 14:10:58 -0400 | From | Dave Jones <> | Subject | Re: [BUG] warning at kernel/cpu.c:38/lock_cpu_hotplug() |
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On Sat, Sep 23, 2006 at 12:36:34PM +0300, S.Çağlar Onur wrote: > 23 Eyl 2006 Cts 02:13 tarihinde, Dave Jones şunları yazmıştı: > > On Sat, Sep 23, 2006 at 01:45:16AM +0300, S.Çağlar Onur wrote: > > > Hi; > > > > > > With kernel-2.6.18, "modprobe cpufreq_stats" always (i can reproduce) > > > gaves following; > > > > > > ... > > > Lukewarm IQ detected in hotplug locking > > > BUG: warning at kernel/cpu.c:38/lock_cpu_hotplug() > > > [<b0134a42>] lock_cpu_hotplug+0x42/0x65 > > > [<b02f8af1>] cpufreq_update_policy+0x25/0xad > > > [<b0358756>] kprobe_flush_task+0x18/0x40 > > > [<b0355aab>] schedule+0x63f/0x68b > > > [<b01377c2>] __link_module+0x0/0x1f > > > [<b0119e7d>] __cond_resched+0x16/0x34 > > > [<b03560bf>] cond_resched+0x26/0x31 > > > [<b0355b0e>] wait_for_completion+0x17/0xb1 > > > [<f965c547>] cpufreq_stat_cpu_callback+0x13/0x20 [cpufreq_stats] > > > [<f9670074>] cpufreq_stats_init+0x74/0x8b [cpufreq_stats] > > > [<b0137872>] sys_init_module+0x91/0x174 > > > [<b0102c81>] sysenter_past_esp+0x56/0x79 > > > > This should do the trick. > > I'll merge the same patch into cpufreq.git > > What about cpufreq_stats_exit, it has same locking? Seems like rmmod may cause > same problem or im totaly wrong?
The CPU_DEAD notifier doesn't take the lock, so it's safe.
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