[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-users] Re: 3.0.0-rc2: Xen: powernow-k8: Kernel panic - not syncing: Attempted to kill init!
On Tue, Jun 14, 2011 at 11:28:27PM +0200, Tobias Diedrich wrote: > Konrad Rzeszutek Wilk wrote: > > On Tue, Jun 14, 2011 at 03:46:34PM +0200, Tobias Diedrich wrote: > > > [ 5.740826] powernow-k8: fid 0x2 (1000 MHz), vid 0x12 > > > [ 5.740941] powernow-k8: fid 0xa (1800 MHz), vid 0xa > > > [ 5.741057] powernow-k8: fid 0xc (2000 MHz), vid 0x8 > > > [ 5.741170] powernow-k8: fid 0xe (2200 MHz), vid 0x8 > > > [ 5.741304] cpufreq_stats_create_table: policy->cur is 800000 > > > [ 5.741475] last_index set to -1 in cpufreq_stats_create_table! > > > > > > I think policy->cur used here probably set in powernowk8_cpu_init. > > > > Yup, and there is not much that can be done there. Lets try this patch > > Thanks, this works fine for suppressing the crash. OK, can you do one more test? Can you reboot the kernel without Xen and see whether the baremetal kernel still works? Wouldn't want to cause a regression. Is it OK if I stick Reported-by/Tested-by: Tobias .. on the patches for upstream submission? > > > diff --git a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c > > b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c > > index 2368e38..7e4a664 100644 > > --- a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c > > +++ b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c > > @@ -1079,8 +1079,10 @@ static int transition_frequency_fidvid(struct > > powernow_k8_data *data, > > } > > > > res = transition_fid_vid(data, fid, vid); > > - freqs.new = find_khz_freq_from_fid(data->currfid); > > + if (res) > > + return res; > > > > + freqs.new = find_khz_freq_from_fid(data->currfid); > > for_each_cpu(i, data->available_cores) { > > freqs.cpu = i; > > cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE); > > @@ -1112,6 +1114,9 @@ static int transition_frequency_pstate(struct > > powernow_k8_data *data, > > } > > > > res = transition_pstate(data, pstate); > > + if (res) > > + return res; > > + > > freqs.new = find_khz_freq_from_pstate(data->powernow_table, pstate); > > > > for_each_cpu(i, data->available_cores) { > > diff --git a/drivers/cpufreq/cpufreq_stats.c > > b/drivers/cpufreq/cpufreq_stats.c > > index 4f1b8de..0ecb1e2 100644 > > --- a/drivers/cpufreq/cpufreq_stats.c > > +++ b/drivers/cpufreq/cpufreq_stats.c > > @@ -298,11 +298,13 @@ static int cpufreq_stat_notifier_trans(struct > > notifier_block *nb, > > old_index = stat->last_index; > > new_index = freq_table_get_index(stat, freq->new); > > > > - cpufreq_stats_update(freq->cpu); > > - if (old_index == new_index) > > + /* We can't do stat->time_in_state[-1]= .. */ > > + if (old_index == -1 || new_index == -1) > > return 0; > > > > - if (old_index == -1 || new_index == -1) > > + cpufreq_stats_update(freq->cpu); > > + > > + if (old_index == new_index) > > return 0; > > > > spin_lock(&cpufreq_stats_lock); > > -- > Tobias PGP: > http://8ef7ddba.uguu.de > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users
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