diff options
Diffstat (limited to 'Documentation/admin-guide')
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 11 | ||||
| -rw-r--r-- | Documentation/admin-guide/pm/intel_pstate.rst | 14 |
2 files changed, 19 insertions, 6 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index efc7aa7a0670..5cde1ff32ff3 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -2835,8 +2835,6 @@ nosync [HW,M68K] Disables sync negotiation for all devices. - notsc [BUGS=X86-32] Disable Time Stamp Counter - nowatchdog [KNL] Disable both lockup detectors, i.e. soft-lockup and NMI watchdog (hard-lockup). @@ -3632,8 +3630,8 @@ Set time (s) after boot for CPU-hotplug testing. rcutorture.onoff_interval= [KNL] - Set time (s) between CPU-hotplug operations, or - zero to disable CPU-hotplug testing. + Set time (jiffies) between CPU-hotplug operations, + or zero to disable CPU-hotplug testing. rcutorture.shuffle_interval= [KNL] Set task-shuffle interval (s). Shuffling tasks @@ -4846,3 +4844,8 @@ xirc2ps_cs= [NET,PCMCIA] Format: <irq>,<irq_mask>,<io>,<full_duplex>,<do_sound>,<lockup_hack>[,<irq2>[,<irq3>[,<irq4>]]] + + xhci-hcd.quirks [USB,KNL] + A hex value specifying bitmask with supplemental xhci + host controller quirks. Meaning of each bit can be + consulted in header drivers/usb/host/xhci.h. diff --git a/Documentation/admin-guide/pm/intel_pstate.rst b/Documentation/admin-guide/pm/intel_pstate.rst index 8b9164990956..8f1d3de449b5 100644 --- a/Documentation/admin-guide/pm/intel_pstate.rst +++ b/Documentation/admin-guide/pm/intel_pstate.rst @@ -324,8 +324,7 @@ Global Attributes ``intel_pstate`` exposes several global attributes (files) in ``sysfs`` to control its functionality at the system level. They are located in the -``/sys/devices/system/cpu/cpufreq/intel_pstate/`` directory and affect all -CPUs. +``/sys/devices/system/cpu/intel_pstate/`` directory and affect all CPUs. Some of them are not present if the ``intel_pstate=per_cpu_perf_limits`` argument is passed to the kernel in the command line. @@ -379,6 +378,17 @@ argument is passed to the kernel in the command line. but it affects the maximum possible value of per-policy P-state limits (see `Interpretation of Policy Attributes`_ below for details). +``hwp_dynamic_boost`` + This attribute is only present if ``intel_pstate`` works in the + `active mode with the HWP feature enabled <Active Mode With HWP_>`_ in + the processor. If set (equal to 1), it causes the minimum P-state limit + to be increased dynamically for a short time whenever a task previously + waiting on I/O is selected to run on a given logical CPU (the purpose + of this mechanism is to improve performance). + + This setting has no effect on logical CPUs whose minimum P-state limit + is directly set to the highest non-turbo P-state or above it. + .. _status_attr: ``status`` |