Eric Lee / smarc-fsl-linux-kernel

29 May, 2019

1 commit

  • 1c4924220   perf script: Pad DSO name for --call-trace ... Browse Code »

    Pad the DSO name in --call-trace so we don't have the indent screwed by
    different DSO name lengths, as now for kernel there's also BPF code
    displayed.

    # perf-with-kcore record pt -e intel_pt//ku -- sleep 1
    # perf-core/perf-with-kcore script pt --call-trace

    Before:

    sleep 3660 [16] 57036.806464404: ([kernel.kallsyms]) kretprobe_perf_func
    sleep 3660 [16] 57036.806464404: ([kernel.kallsyms]) trace_call_bpf
    sleep 3660 [16] 57036.806464404: ([kernel.kallsyms]) __x86_indirect_thunk_rax
    sleep 3660 [16] 57036.806464404: ([kernel.kallsyms]) __x86_indirect_thunk_rax
    sleep 3660 [16] 57036.806464725: (bpf_prog_da4fe6b3d2c29b25_trace_return) bpf_get_current_pid_tgid
    sleep 3660 [16] 57036.806464725: (bpf_prog_da4fe6b3d2c29b25_trace_return) bpf_ktime_get_ns
    sleep 3660 [16] 57036.806464725: ([kernel.kallsyms]) __x86_indirect_thunk_rax
    sleep 3660 [16] 57036.806464725: ([kernel.kallsyms]) __x86_indirect_thunk_rax
    sleep 3660 [16] 57036.806465045: (bpf_prog_da4fe6b3d2c29b25_trace_return) __htab_map_lookup_elem
    sleep 3660 [16] 57036.806465366: ([kernel.kallsyms]) memcmp
    sleep 3660 [16] 57036.806465687: (bpf_prog_da4fe6b3d2c29b25_trace_return) bpf_probe_read
    sleep 3660 [16] 57036.806465687: ([kernel.kallsyms]) probe_kernel_read
    sleep 3660 [16] 57036.806465687: ([kernel.kallsyms]) __check_object_size
    sleep 3660 [16] 57036.806465687: ([kernel.kallsyms]) check_stack_object
    sleep 3660 [16] 57036.806465687: ([kernel.kallsyms]) copy_user_enhanced_fast_string
    sleep 3660 [16] 57036.806465687: (bpf_prog_da4fe6b3d2c29b25_trace_return) bpf_probe_read
    sleep 3660 [16] 57036.806465687: ([kernel.kallsyms]) probe_kernel_read
    sleep 3660 [16] 57036.806465687: ([kernel.kallsyms]) __check_object_size
    sleep 3660 [16] 57036.806465687: ([kernel.kallsyms]) check_stack_object
    sleep 3660 [16] 57036.806465687: ([kernel.kallsyms]) copy_user_enhanced_fast_string
    sleep 3660 [16] 57036.806466008: (bpf_prog_da4fe6b3d2c29b25_trace_return) bpf_get_current_uid_gid
    sleep 3660 [16] 57036.806466008: ([kernel.kallsyms]) from_kgid
    sleep 3660 [16] 57036.806466008: ([kernel.kallsyms]) from_kuid
    sleep 3660 [16] 57036.806466008: (bpf_prog_da4fe6b3d2c29b25_trace_return) bpf_perf_event_output
    sleep 3660 [16] 57036.806466328: ([kernel.kallsyms]) perf_event_output
    sleep 3660 [16] 57036.806466328: ([kernel.kallsyms]) perf_prepare_sample
    sleep 3660 [16] 57036.806466328: ([kernel.kallsyms]) perf_misc_flags
    sleep 3660 [16] 57036.806466328: ([kernel.kallsyms]) __x86_indirect_thunk_rax
    sleep 3660 [16] 57036.806466328: ([kernel.kallsyms]) __x86_indirect_thunk_rax
    sleep 3660 [16] 57036.806466328: ([kvm]) kvm_is_in_guest
    sleep 3660 [16] 57036.806466649: ([kernel.kallsyms]) __perf_event_header__init_id.isra.0
    sleep 3660 [16] 57036.806466649: ([kernel.kallsyms]) perf_output_begin

    After:

    sleep 3660 [16] 57036.806464404: ([kernel.kallsyms] ) kretprobe_perf_func
    sleep 3660 [16] 57036.806464404: ([kernel.kallsyms] ) trace_call_bpf
    sleep 3660 [16] 57036.806464404: ([kernel.kallsyms] ) __x86_indirect_thunk_rax
    sleep 3660 [16] 57036.806464404: ([kernel.kallsyms] ) __x86_indirect_thunk_rax
    sleep 3660 [16] 57036.806464725: (bpf_prog_da4fe6b3d2c29b25_trace_return ) bpf_get_current_pid_tgid
    sleep 3660 [16] 57036.806464725: (bpf_prog_da4fe6b3d2c29b25_trace_return ) bpf_ktime_get_ns
    sleep 3660 [16] 57036.806464725: ([kernel.kallsyms] ) __x86_indirect_thunk_rax
    sleep 3660 [16] 57036.806464725: ([kernel.kallsyms] ) __x86_indirect_thunk_rax
    sleep 3660 [16] 57036.806465045: (bpf_prog_da4fe6b3d2c29b25_trace_return ) __htab_map_lookup_elem
    sleep 3660 [16] 57036.806465366: ([kernel.kallsyms] ) memcmp
    sleep 3660 [16] 57036.806465687: (bpf_prog_da4fe6b3d2c29b25_trace_return ) bpf_probe_read
    sleep 3660 [16] 57036.806465687: ([kernel.kallsyms] ) probe_kernel_read
    sleep 3660 [16] 57036.806465687: ([kernel.kallsyms] ) __check_object_size
    sleep 3660 [16] 57036.806465687: ([kernel.kallsyms] ) check_stack_object
    sleep 3660 [16] 57036.806465687: ([kernel.kallsyms] ) copy_user_enhanced_fast_string
    sleep 3660 [16] 57036.806465687: (bpf_prog_da4fe6b3d2c29b25_trace_return ) bpf_probe_read
    sleep 3660 [16] 57036.806465687: ([kernel.kallsyms] ) probe_kernel_read
    sleep 3660 [16] 57036.806465687: ([kernel.kallsyms] ) __check_object_size
    sleep 3660 [16] 57036.806465687: ([kernel.kallsyms] ) check_stack_object
    sleep 3660 [16] 57036.806465687: ([kernel.kallsyms] ) copy_user_enhanced_fast_string
    sleep 3660 [16] 57036.806466008: (bpf_prog_da4fe6b3d2c29b25_trace_return ) bpf_get_current_uid_gid
    sleep 3660 [16] 57036.806466008: ([kernel.kallsyms] ) from_kgid
    sleep 3660 [16] 57036.806466008: ([kernel.kallsyms] ) from_kuid
    sleep 3660 [16] 57036.806466008: (bpf_prog_da4fe6b3d2c29b25_trace_return ) bpf_perf_event_output
    sleep 3660 [16] 57036.806466328: ([kernel.kallsyms] ) perf_event_output
    sleep 3660 [16] 57036.806466328: ([kernel.kallsyms] ) perf_prepare_sample
    sleep 3660 [16] 57036.806466328: ([kernel.kallsyms] ) perf_misc_flags
    sleep 3660 [16] 57036.806466328: ([kernel.kallsyms] ) __x86_indirect_thunk_rax
    sleep 3660 [16] 57036.806466328: ([kernel.kallsyms] ) __x86_indirect_thunk_rax

    Signed-off-by: Jiri Olsa
    Acked-by: Song Liu
    Tested-by: Arnaldo Carvalho de Melo
    Cc: Adrian Hunter
    Cc: Alexander Shishkin
    Cc: Andi Kleen
    Cc: Namhyung Kim
    Cc: Peter Zijlstra
    Cc: Stanislav Fomichev
    Link: http://lkml.kernel.org/r/20190508132010.14512-8-jolsa@kernel.org
    Signed-off-by: Arnaldo Carvalho de Melo

    Jiri Olsa
     

02 Nov, 2017

1 commit

  • b24413180   License cleanup: add SPDX GPL-2.0 license identifier to files with no license ... Browse Code »

    Many source files in the tree are missing licensing information, which
    makes it harder for compliance tools to determine the correct license.

    By default all files without license information are under the default
    license of the kernel, which is GPL version 2.

    Update the files which contain no license information with the 'GPL-2.0'
    SPDX license identifier. The SPDX identifier is a legally binding
    shorthand, which can be used instead of the full boiler plate text.

    This patch is based on work done by Thomas Gleixner and Kate Stewart and
    Philippe Ombredanne.

    How this work was done:

    Patches were generated and checked against linux-4.14-rc6 for a subset of
    the use cases:
    - file had no licensing information it it.
    - file was a */uapi/* one with no licensing information in it,
    - file was a */uapi/* one with existing licensing information,

    Further patches will be generated in subsequent months to fix up cases
    where non-standard license headers were used, and references to license
    had to be inferred by heuristics based on keywords.

    The analysis to determine which SPDX License Identifier to be applied to
    a file was done in a spreadsheet of side by side results from of the
    output of two independent scanners (ScanCode & Windriver) producing SPDX
    tag:value files created by Philippe Ombredanne. Philippe prepared the
    base worksheet, and did an initial spot review of a few 1000 files.

    The 4.13 kernel was the starting point of the analysis with 60,537 files
    assessed. Kate Stewart did a file by file comparison of the scanner
    results in the spreadsheet to determine which SPDX license identifier(s)
    to be applied to the file. She confirmed any determination that was not
    immediately clear with lawyers working with the Linux Foundation.

    Criteria used to select files for SPDX license identifier tagging was:
    - Files considered eligible had to be source code files.
    - Make and config files were included as candidates if they contained >5
    lines of source
    - File already had some variant of a license header in it (even if
    Reviewed-by: Philippe Ombredanne
    Reviewed-by: Thomas Gleixner
    Signed-off-by: Greg Kroah-Hartman

    Greg Kroah-Hartman
     

13 Jul, 2016

1 commit