diff options
Diffstat (limited to 'Documentation/admin-guide')
| -rw-r--r-- | Documentation/admin-guide/LSM/ipe.rst | 7 | ||||
| -rw-r--r-- | Documentation/admin-guide/cgroup-v2.rst | 11 | ||||
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 14 | ||||
| -rw-r--r-- | Documentation/admin-guide/mm/transhuge.rst | 2 | ||||
| -rw-r--r-- | Documentation/admin-guide/perf/index.rst | 1 | ||||
| -rw-r--r-- | Documentation/admin-guide/perf/mrvl-pem-pmu.rst | 56 | ||||
| -rw-r--r-- | Documentation/admin-guide/pm/cpufreq.rst | 20 | ||||
| -rw-r--r-- | Documentation/admin-guide/sysctl/fs.rst | 5 |
8 files changed, 101 insertions, 15 deletions
diff --git a/Documentation/admin-guide/LSM/ipe.rst b/Documentation/admin-guide/LSM/ipe.rst index f38e641df0e9..f93a467db628 100644 --- a/Documentation/admin-guide/LSM/ipe.rst +++ b/Documentation/admin-guide/LSM/ipe.rst @@ -223,7 +223,10 @@ are signed through the PKCS#7 message format to enforce some level of authorization of the policies (prohibiting an attacker from gaining unconstrained root, and deploying an "allow all" policy). These policies must be signed by a certificate that chains to the -``SYSTEM_TRUSTED_KEYRING``. With openssl, the policy can be signed by:: +``SYSTEM_TRUSTED_KEYRING``, or to the secondary and/or platform keyrings if +``CONFIG_IPE_POLICY_SIG_SECONDARY_KEYRING`` and/or +``CONFIG_IPE_POLICY_SIG_PLATFORM_KEYRING`` are enabled, respectively. +With openssl, the policy can be signed by:: openssl smime -sign \ -in "$MY_POLICY" \ @@ -266,7 +269,7 @@ in the kernel. This file is write-only and accepts a PKCS#7 signed policy. Two checks will always be performed on this policy: First, the ``policy_names`` must match with the updated version and the existing version. Second the updated policy must have a policy version greater than -or equal to the currently-running version. This is to prevent rollback attacks. +the currently-running version. This is to prevent rollback attacks. The ``delete`` file is used to remove a policy that is no longer needed. This file is write-only and accepts a value of ``1`` to delete the policy. diff --git a/Documentation/admin-guide/cgroup-v2.rst b/Documentation/admin-guide/cgroup-v2.rst index 69af2173555f..2cb58daf3089 100644 --- a/Documentation/admin-guide/cgroup-v2.rst +++ b/Documentation/admin-guide/cgroup-v2.rst @@ -1599,6 +1599,15 @@ The following nested keys are defined. pglazyfreed (npn) Amount of reclaimed lazyfree pages + swpin_zero + Number of pages swapped into memory and filled with zero, where I/O + was optimized out because the page content was detected to be zero + during swapout. + + swpout_zero + Number of zero-filled pages swapped out with I/O skipped due to the + content being detected as zero. + zswpin Number of pages moved in to memory from zswap. @@ -2945,7 +2954,7 @@ following two functions. a queue (device) has been associated with the bio and before submission. - wbc_account_cgroup_owner(@wbc, @page, @bytes) + wbc_account_cgroup_owner(@wbc, @folio, @bytes) Should be called for each data segment being written out. While this function doesn't care exactly when it's called during the writeback session, it's the easiest and most diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 686ea876a89c..7e1315ee0507 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -446,6 +446,9 @@ arm64.nobti [ARM64] Unconditionally disable Branch Target Identification support + arm64.nogcs [ARM64] Unconditionally disable Guarded Control Stack + support + arm64.nomops [ARM64] Unconditionally disable Memory Copy and Memory Set instructions support @@ -6691,7 +6694,7 @@ 0: no polling (default) thp_anon= [KNL] - Format: <size>,<size>[KMG]:<state>;<size>-<size>[KMG]:<state> + Format: <size>[KMG],<size>[KMG]:<state>;<size>[KMG]-<size>[KMG]:<state> state is one of "always", "madvise", "never" or "inherit". Control the default behavior of the system with respect to anonymous transparent hugepages. @@ -6730,6 +6733,15 @@ torture.verbose_sleep_duration= [KNL] Duration of each verbose-printk() sleep in jiffies. + tpm.disable_pcr_integrity= [HW,TPM] + Do not protect PCR registers from unintended physical + access, or interposers in the bus by the means of + having an integrity protected session wrapped around + TPM2_PCR_Extend command. Consider this in a situation + where TPM is heavily utilized by IMA, thus protection + causing a major performance hit, and the space where + machines are deployed is by other means guarded. + tpm_suspend_pcr=[HW,TPM] Format: integer pcr id Specify that at suspend time, the tpm driver diff --git a/Documentation/admin-guide/mm/transhuge.rst b/Documentation/admin-guide/mm/transhuge.rst index cfdd16a52e39..a1bb495eab59 100644 --- a/Documentation/admin-guide/mm/transhuge.rst +++ b/Documentation/admin-guide/mm/transhuge.rst @@ -303,7 +303,7 @@ control by passing the parameter ``transparent_hugepage=always`` or kernel command line. Alternatively, each supported anonymous THP size can be controlled by -passing ``thp_anon=<size>,<size>[KMG]:<state>;<size>-<size>[KMG]:<state>``, +passing ``thp_anon=<size>[KMG],<size>[KMG]:<state>;<size>[KMG]-<size>[KMG]:<state>``, where ``<size>`` is the THP size (must be a power of 2 of PAGE_SIZE and supported anonymous THP) and ``<state>`` is one of ``always``, ``madvise``, ``never`` or ``inherit``. diff --git a/Documentation/admin-guide/perf/index.rst b/Documentation/admin-guide/perf/index.rst index 8502bc174640..a58bd3f7e190 100644 --- a/Documentation/admin-guide/perf/index.rst +++ b/Documentation/admin-guide/perf/index.rst @@ -26,3 +26,4 @@ Performance monitor support meson-ddr-pmu cxl ampere_cspmu + mrvl-pem-pmu diff --git a/Documentation/admin-guide/perf/mrvl-pem-pmu.rst b/Documentation/admin-guide/perf/mrvl-pem-pmu.rst new file mode 100644 index 000000000000..c39007149b97 --- /dev/null +++ b/Documentation/admin-guide/perf/mrvl-pem-pmu.rst @@ -0,0 +1,56 @@ +================================================================= +Marvell Odyssey PEM Performance Monitoring Unit (PMU UNCORE) +================================================================= + +The PCI Express Interface Units(PEM) are associated with a corresponding +monitoring unit. This includes performance counters to track various +characteristics of the data that is transmitted over the PCIe link. + +The counters track inbound and outbound transactions which +includes separate counters for posted/non-posted/completion TLPs. +Also, inbound and outbound memory read requests along with their +latencies can also be monitored. Address Translation Services(ATS)events +such as ATS Translation, ATS Page Request, ATS Invalidation along with +their corresponding latencies are also tracked. + +There are separate 64 bit counters to measure posted/non-posted/completion +tlps in inbound and outbound transactions. ATS events are measured by +different counters. + +The PMU driver exposes the available events and format options under sysfs, +/sys/bus/event_source/devices/mrvl_pcie_rc_pmu_<>/events/ +/sys/bus/event_source/devices/mrvl_pcie_rc_pmu_<>/format/ + +Examples:: + + # perf list | grep mrvl_pcie_rc_pmu + mrvl_pcie_rc_pmu_<>/ats_inv/ [Kernel PMU event] + mrvl_pcie_rc_pmu_<>/ats_inv_latency/ [Kernel PMU event] + mrvl_pcie_rc_pmu_<>/ats_pri/ [Kernel PMU event] + mrvl_pcie_rc_pmu_<>/ats_pri_latency/ [Kernel PMU event] + mrvl_pcie_rc_pmu_<>/ats_trans/ [Kernel PMU event] + mrvl_pcie_rc_pmu_<>/ats_trans_latency/ [Kernel PMU event] + mrvl_pcie_rc_pmu_<>/ib_inflight/ [Kernel PMU event] + mrvl_pcie_rc_pmu_<>/ib_reads/ [Kernel PMU event] + mrvl_pcie_rc_pmu_<>/ib_req_no_ro_ebus/ [Kernel PMU event] + mrvl_pcie_rc_pmu_<>/ib_req_no_ro_ncb/ [Kernel PMU event] + mrvl_pcie_rc_pmu_<>/ib_tlp_cpl_partid/ [Kernel PMU event] + mrvl_pcie_rc_pmu_<>/ib_tlp_dwords_cpl_partid/ [Kernel PMU event] + mrvl_pcie_rc_pmu_<>/ib_tlp_dwords_npr/ [Kernel PMU event] + mrvl_pcie_rc_pmu_<>/ib_tlp_dwords_pr/ [Kernel PMU event] + mrvl_pcie_rc_pmu_<>/ib_tlp_npr/ [Kernel PMU event] + mrvl_pcie_rc_pmu_<>/ib_tlp_pr/ [Kernel PMU event] + mrvl_pcie_rc_pmu_<>/ob_inflight_partid/ [Kernel PMU event] + mrvl_pcie_rc_pmu_<>/ob_merges_cpl_partid/ [Kernel PMU event] + mrvl_pcie_rc_pmu_<>/ob_merges_npr_partid/ [Kernel PMU event] + mrvl_pcie_rc_pmu_<>/ob_merges_pr_partid/ [Kernel PMU event] + mrvl_pcie_rc_pmu_<>/ob_reads_partid/ [Kernel PMU event] + mrvl_pcie_rc_pmu_<>/ob_tlp_cpl_partid/ [Kernel PMU event] + mrvl_pcie_rc_pmu_<>/ob_tlp_dwords_cpl_partid/ [Kernel PMU event] + mrvl_pcie_rc_pmu_<>/ob_tlp_dwords_npr_partid/ [Kernel PMU event] + mrvl_pcie_rc_pmu_<>/ob_tlp_dwords_pr_partid/ [Kernel PMU event] + mrvl_pcie_rc_pmu_<>/ob_tlp_npr_partid/ [Kernel PMU event] + mrvl_pcie_rc_pmu_<>/ob_tlp_pr_partid/ [Kernel PMU event] + + + # perf stat -e ib_inflight,ib_reads,ib_req_no_ro_ebus,ib_req_no_ro_ncb <workload> diff --git a/Documentation/admin-guide/pm/cpufreq.rst b/Documentation/admin-guide/pm/cpufreq.rst index fe1be4ad88cb..a21369eba034 100644 --- a/Documentation/admin-guide/pm/cpufreq.rst +++ b/Documentation/admin-guide/pm/cpufreq.rst @@ -425,8 +425,8 @@ This governor exposes only one tunable: ``rate_limit_us`` Minimum time (in microseconds) that has to pass between two consecutive - runs of governor computations (default: 1000 times the scaling driver's - transition latency). + runs of governor computations (default: 1.5 times the scaling driver's + transition latency or the maximum 2ms). The purpose of this tunable is to reduce the scheduler context overhead of the governor which might be excessive without it. @@ -474,17 +474,17 @@ This governor exposes the following tunables: This is how often the governor's worker routine should run, in microseconds. - Typically, it is set to values of the order of 10000 (10 ms). Its - default value is equal to the value of ``cpuinfo_transition_latency`` - for each policy this governor is attached to (but since the unit here - is greater by 1000, this means that the time represented by - ``sampling_rate`` is 1000 times greater than the transition latency by - default). + Typically, it is set to values of the order of 2000 (2 ms). Its + default value is to add a 50% breathing room + to ``cpuinfo_transition_latency`` on each policy this governor is + attached to. The minimum is typically the length of two scheduler + ticks. If this tunable is per-policy, the following shell command sets the time - represented by it to be 750 times as high as the transition latency:: + represented by it to be 1.5 times as high as the transition latency + (the default):: - # echo `$(($(cat cpuinfo_transition_latency) * 750 / 1000)) > ondemand/sampling_rate + # echo `$(($(cat cpuinfo_transition_latency) * 3 / 2)) > ondemand/sampling_rate ``up_threshold`` If the estimated CPU load is above this value (in percent), the governor diff --git a/Documentation/admin-guide/sysctl/fs.rst b/Documentation/admin-guide/sysctl/fs.rst index 47499a1742bd..30c61474dec5 100644 --- a/Documentation/admin-guide/sysctl/fs.rst +++ b/Documentation/admin-guide/sysctl/fs.rst @@ -38,6 +38,11 @@ requests. ``aio-max-nr`` allows you to change the maximum value ``aio-max-nr`` does not result in the pre-allocation or re-sizing of any kernel data structures. +dentry-negative +---------------------------- + +Policy for negative dentries. Set to 1 to to always delete the dentry when a +file is removed, and 0 to disable it. By default, this behavior is disabled. dentry-state ------------ |