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Date: Fri, 08 Aug 2014 20:26:29 +0300 From: Oleksandr Natalenko <oleksandr@...alenko.name> To: linux-kernel@...r.kernel.org Cc: linux-pm@...r.kernel.org Subject: Re: [BUG] oops in cpufreq driver with AMD Kaveri CPU Filled up detailed bugreport on bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=81701 On Thursday 07 August 2014 23:53:17 Oleksandr Natalenko wrote: > Disabling cpufreq code in kernel config works around this issue. > > Is this bug related to sleeping in atomic context, which is caused by > improper GFP_KERNEL usage instead of GFP_ATOMIC? Should I test tat patch, > or there will be another fix? > > On Tuesday 05 August 2014 00:39:11 Oleksandr Natalenko wrote: > > Hello. > > > > Occasionally I get my machine hung completely. Fortunately, I've got and > > saved oops listing using netconsole before hang, and here it is [1]. > > > > Here is little piece of oops from the link above: > > > > === > > [15051.270461] BUG: unable to handle kernel paging request at > > 00000000ff5ae8e4 [15051.271583] IP: [<ffffffff8109ae6e>] > > srcu_notifier_call_chain+0xe/0x20 … > > [15051.956205] Call Trace: > > [15051.980641] [<ffffffff81606085>] ? > > __cpufreq_notify_transition+0x95/0x1e0 [15052.005640] > > [<ffffffff816081ee>] > > cpufreq_notify_transition+0x3e/0x70 [15052.030240] [<ffffffff816083d8>] > > cpufreq_freq_transition_begin+0xe8/0x130 [15052.054522] > > [<ffffffff813b8940>] ? ucs2_strncmp+0x70/0x70 > > [15052.078208] [<ffffffff816089bf>] __target_index+0xbf/0x1a0 > > [15052.101348] [<ffffffff81608b9c>] __cpufreq_driver_target+0xfc/0x160 > > [15052.124250] [<ffffffff8160b0d4>] od_check_cpu+0xa4/0xb0 > > [15052.146789] [<ffffffff8160c9ec>] dbs_check_cpu+0x16c/0x1c0 > > [15052.168935] [<ffffffff8160b4dd>] od_dbs_timer+0x11d/0x180 > > [15052.190607] [<ffffffff8108e6ff>] process_one_work+0x17f/0x4c0 > > [15052.211825] [<ffffffff8108f46b>] worker_thread+0x11b/0x3f0 > > [15052.232490] [<ffffffff8108f350>] ? create_and_start_worker+0x80/0x80 > > [15052.253127] [<ffffffff81096479>] kthread+0xc9/0xe0 > > [15052.273292] [<ffffffff810963b0>] ? flush_kthread_worker+0xb0/0xb0 > > [15052.293487] [<ffffffff81793efc>] ret_from_fork+0x7c/0xb0 > > [15052.313544] [<ffffffff810963b0>] ? flush_kthread_worker+0xb0/0xb0 > > … > > === > > > > Also here is my lspci [2] and cpuinfo [3] as well. > > > > Vanilla 3.15.8 and 3.16.0 are affected as well as latest Ubuntu 3.13 > > kernel. > > > > No visible reason to trigger the bug. After hang machine doesn't respond > > via network, there's no disk IO, and also it doesn't respond to pressing > > power button in order to perform soft off. > > > > [1] https://gist.github.com/085af9da81197faf6637 > > [2] https://gist.github.com/318ebda5576b099590b8 > > [3] https://gist.github.com/9c1307463c7ad6835b2d -- Oleksandr post-factum Natalenko, MSc pf-kernel community https://natalenko.name/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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