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Commit 5aafae8d authored by Ingo Molnar's avatar Ingo Molnar
Browse files

Merge tag 'perf-core-for-mingo-4.18-20180516' of... 

Merge tag 'perf-core-for-mingo-4.18-20180516' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux

 into perf/core

Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:

- Add '-e intel_pt//u' test to the 'parse-events' 'perf test' entry,
  to help avoiding regressions in the events parser such as one
  that caused a revert in v4.17-rc (Arnaldo Carvalho de Melo)

- Fix NULL return handling in bpf__prepare_load() (YueHaibing)

- Warn about 'perf buildid-cache --purge-all' failures (Ravi Bangoria)

- Add infrastructure to help in writing eBPF C programs to be used
  with '-e name.c' type events in tools such as 'record' and 'trace',
  with headers for common constructs and an examples directory that
  will get populated as we add more such helpers and the 'perf bpf'
  branch that Jiri Olsa has been working on (Arnaldo Carvalho de Melo)

- Handle uncore event aliases in small groups properly (Kan Liang)

- Use the "_stest" symbol to identify the kernel map when loading kcore (Adrian Hunter)

Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parents eaeb1f4d 7a36a287

Documentation/admin-guide/pm/intel_pstate.rst

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@@ -145,7 +145,7 @@ feature enabled.] 


In this mode ``intel_pstate`` registers utilization update callbacks with the

CPU scheduler in order to run a P-state selection algorithm, either

``powersave`` or ``performance``, depending on the ``scaling_cur_freq`` policy

``powersave`` or ``performance``, depending on the ``scaling_governor`` policy

setting in ``sysfs``.  The current CPU frequency information to be made

available from the ``scaling_cur_freq`` policy attribute in ``sysfs`` is

periodically updated by those utilization update callbacks too.

Documentation/admin-guide/pm/sleep-states.rst

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@@ -15,7 +15,7 @@ Sleep States That Can Be Supported 
==================================



Depending on its configuration and the capabilities of the platform it runs on,

the Linux kernel can support up to four system sleep states, includig

the Linux kernel can support up to four system sleep states, including

hibernation and up to three variants of system suspend.  The sleep states that

can be supported by the kernel are listed below.

Documentation/bpf/bpf_devel_QA.txt

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@@ -557,6 +557,14 @@ A: Although LLVM IR generation and optimization try to stay architecture 
       pulls in some header files containing file scope host assembly codes.

     - You can add "-fno-jump-tables" to work around the switch table issue.



   Otherwise, you can use bpf target.

   Otherwise, you can use bpf target. Additionally, you _must_ use bpf target

   when:



     - Your program uses data structures with pointer or long / unsigned long

       types that interface with BPF helpers or context data structures. Access

       into these structures is verified by the BPF verifier and may result

       in verification failures if the native architecture is not aligned with

       the BPF architecture, e.g. 64-bit. An example of this is

       BPF_PROG_TYPE_SK_MSG require '-target bpf'



Happy BPF hacking!

Documentation/device-mapper/thin-provisioning.txt

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@@ -264,7 +264,10 @@ i) Constructor 
			   data device, but just remove the mapping.



      read_only: Don't allow any changes to be made to the pool

		 metadata.

		 metadata.  This mode is only available after the

		 thin-pool has been created and first used in full

		 read/write mode.  It cannot be specified on initial

		 thin-pool creation.



      error_if_no_space: Error IOs, instead of queueing, if no space.

Documentation/devicetree/bindings/ata/ahci-platform.txt

+0 −1
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@@ -30,7 +30,6 @@ compatible: 
Optional properties:

- dma-coherent      : Present if dma operations are coherent

- clocks            : a list of phandle + clock specifier pairs

- resets            : a list of phandle + reset specifier pairs

- target-supply     : regulator for SATA target power

- phys              : reference to the SATA PHY node

- phy-names         : must be "sata-phy"