linux-kernel - [PATCH] cpufreq: intel_pstate: Fix cpuinfo_cur

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 24 Jul 2017 05:43:14 +0000
From:   Huaisheng HS1 Ye <yehs1@...ovo.com>
To:     "srinivas.pandruvada@...ux.intel.com" 
        <srinivas.pandruvada@...ux.intel.com>
CC:     "lenb@...nel.org" <lenb@...nel.org>,
        "rjw@...ysocki.net" <rjw@...ysocki.net>,
        "viresh.kumar@...aro.org" <viresh.kumar@...aro.org>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Huaisheng HS1 Ye" <yehs1@...ovo.com>
Subject: [PATCH] cpufreq: intel_pstate: Fix cpuinfo_cur_freq after performance
 governor changes

After commit 82b4e03e01bc (intel_pstate: skip scheduler hook when
in "performance" mode) Software P-state control modes couldn't get
dynamic value during performance mode, and it still in last value from
powersave mode, so clear its value to get same behavior as Hardware
P-state to avoid confusion.

Signed-off-by: Huaisheng Ye <yehs1@...ovo.com>
---
 drivers/cpufreq/intel_pstate.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index 6cd5035..c675626 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -2050,6 +2050,7 @@ static int intel_pstate_set_policy(struct cpufreq_policy *policy)
 		 */
 		intel_pstate_clear_update_util_hook(policy->cpu);
 		intel_pstate_max_within_limits(cpu);
+		cpu->sample.core_avg_perf = 0;
 	} else {
 		intel_pstate_set_update_util_hook(policy->cpu);
 	}
-- 
1.8.3.1