diff options
Diffstat (limited to 'intel-pstate-do-not-load-on-VM-that-do-not-report-max-P-state.patch')
| -rw-r--r-- | intel-pstate-do-not-load-on-VM-that-do-not-report-max-P-state.patch | 58 |
1 files changed, 0 insertions, 58 deletions
diff --git a/intel-pstate-do-not-load-on-VM-that-do-not-report-max-P-state.patch b/intel-pstate-do-not-load-on-VM-that-do-not-report-max-P-state.patch deleted file mode 100644 index 814631704..000000000 --- a/intel-pstate-do-not-load-on-VM-that-do-not-report-max-P-state.patch +++ /dev/null @@ -1,58 +0,0 @@ -Hi Josh, - -Sorry for the slow resopnse you caught me on vacation :-) - -I do not have either of these VMs ATM to test against. The patch below -should solve the problem though It looks like the VM is returning zero -for the highest P state (frequency) MSR. The patch will have the driver refuse -to load and the system should fall through to one of the other configured -governors/ scaling drivers. - -Is it possible for tyou to test the patch below while I try to get a test setup -put together locally? - -Thanks in advance ---Dirk - -On 03/01/2013 06:13 AM, Josh Boyer wrote: -> Hi, -> -> We've had a report[1] that the intel_pstate driver will panic on boot -> under certain virtual machine environments. Thus far it seems VMWare -> and Hyper-V both see this. While this may be because of something those -> VMs are doing, the driver probably shouldn't cause a panic if it's -> getting some iffy data. -> -commit db138459876467dd1b4785ce2b35c9db31dab056 -Author: Dirk Brandewie <dirk.brandewie@gmail.com> -Date: Mon Mar 4 10:14:42 2013 -0800 - - cpufreq/intel_pstate: Do not load on VM that do not report max P state. - - It seems some VMs support the P state MSRs but return zeros. Fail - gracefully if we are running in this environment. - - https://bugzilla.redhat.com/show_bug.cgi?id=916833 - - Reported-by: jwboyer@redhat.com - - Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com> ---- - drivers/cpufreq/intel_pstate.c | 3 +++ - 1 files changed, 3 insertions(+), 0 deletions(-) - - -diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c -index 096fde0..2bfd083 100644 ---- a/drivers/cpufreq/intel_pstate.c -+++ b/drivers/cpufreq/intel_pstate.c -@@ -662,6 +662,9 @@ static int intel_pstate_set_policy(struct cpufreq_policy *policy) - - cpu = all_cpu_data[policy->cpu]; - -+ if (!policy->cpuinfo.max_freq) -+ return -ENODEV; -+ - intel_pstate_get_min_max(cpu, &min, &max); - - limits.min_perf_pct = (policy->min * 100) / policy->cpuinfo.max_freq; |