1. 18 Nov, 2017 1 commit
  2. 14 Nov, 2017 1 commit
  3. 11 Nov, 2017 8 commits
  4. 08 Nov, 2017 2 commits
  5. 05 Nov, 2017 1 commit
  6. 02 Nov, 2017 5 commits
    • Greg Kroah-Hartman's avatar
      License cleanup: add SPDX GPL-2.0 license identifier to files with no license · b2441318
      Greg Kroah-Hartman authored
      
      
      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 <5
         lines).
      
      All documentation files were explicitly excluded.
      
      The following heuristics were used to determine which SPDX license
      identifiers to apply.
      
       - when both scanners couldn't find any license traces, file was
         considered to have no license information in it, and the top level
         COPYING file license applied.
      
         For non */uapi/* files that summary was:
      
         SPDX license identifier                            # files
         ---------------------------------------------------|-------
         GPL-2.0                                              11139
      
         and resulted in the first patch in this series.
      
         If that file was a */uapi/* path one, it was "GPL-2.0 WITH
         Linux-syscall-note" otherwise it was "GPL-2.0".  Results of that was:
      
         SPDX license identifier                            # files
         ---------------------------------------------------|-------
         GPL-2.0 WITH Linux-syscall-note                        930
      
         and resulted in the second patch in this series.
      
       - if a file had some form of licensing information in it, and was one
         of the */uapi/* ones, it was denoted with the Linux-syscall-note if
         any GPL family license was found in the file or had no licensing in
         it (per prior point).  Results summary:
      
         SPDX license identifier                            # files
         ---------------------------------------------------|------
         GPL-2.0 WITH Linux-syscall-note                       270
         GPL-2.0+ WITH Linux-syscall-note                      169
         ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause)    21
         ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)    17
         LGPL-2.1+ WITH Linux-syscall-note                      15
         GPL-1.0+ WITH Linux-syscall-note                       14
         ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause)    5
         LGPL-2.0+ WITH Linux-syscall-note                       4
         LGPL-2.1 WITH Linux-syscall-note                        3
         ((GPL-2.0 WITH Linux-syscall-note) OR MIT)              3
         ((GPL-2.0 WITH Linux-syscall-note) AND MIT)             1
      
         and that resulted in the third patch in this series.
      
       - when the two scanners agreed on the detected license(s), that became
         the concluded license(s).
      
       - when there was disagreement between the two scanners (one detected a
         license but the other didn't, or they both detected different
         licenses) a manual inspection of the file occurred.
      
       - In most cases a manual inspection of the information in the file
         resulted in a clear resolution of the license that should apply (and
         which scanner probably needed to revisit its heuristics).
      
       - When it was not immediately clear, the license identifier was
         confirmed with lawyers working with the Linux Foundation.
      
       - If there was any question as to the appropriate license identifier,
         the file was flagged for further research and to be revisited later
         in time.
      
      In total, over 70 hours of logged manual review was done on the
      spreadsheet to determine the SPDX license identifiers to apply to the
      source files by Kate, Philippe, Thomas and, in some cases, confirmation
      by lawyers working with the Linux Foundation.
      
      Kate also obtained a third independent scan of the 4.13 code base from
      FOSSology, and compared selected files where the other two scanners
      disagreed against that SPDX file, to see if there was new insights.  The
      Windriver scanner is based on an older version of FOSSology in part, so
      they are related.
      
      Thomas did random spot checks in about 500 files from the spreadsheets
      for the uapi headers and agreed with SPDX license identifier in the
      files he inspected. For the non-uapi files Thomas did random spot checks
      in about 15000 files.
      
      In initial set of patches against 4.14-rc6, 3 files were found to have
      copy/paste license identifier errors, and have been fixed to reflect the
      correct identifier.
      
      Additionally Philippe spent 10 hours this week doing a detailed manual
      inspection and review of the 12,461 patched files from the initial patch
      version early this week with:
       - a full scancode scan run, collecting the matched texts, detected
         license ids and scores
       - reviewing anything where there was a license detected (about 500+
         files) to ensure that the applied SPDX license was correct
       - reviewing anything where there was no detection but the patch license
         was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
         SPDX license was correct
      
      This produced a worksheet with 20 files needing minor correction.  This
      worksheet was then exported into 3 different .csv files for the
      different types of files to be modified.
      
      These .csv files were then reviewed by Greg.  Thomas wrote a script to
      parse the csv files and add the proper SPDX tag to the file, in the
      format that the file expected.  This script was further refined by Greg
      based on the output to detect more types of files automatically and to
      distinguish between header and source .c files (which need different
      comment types.)  Finally Greg ran the script using the .csv files to
      generate the patches.
      Reviewed-by: default avatarKate Stewart <kstewart@linuxfoundation.org>
      Reviewed-by: default avatarPhilippe Ombredanne <pombredanne@nexb.com>
      Reviewed-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      b2441318
    • Jesper Dangaard Brouer's avatar
      samples/pktgen: remove remaining old pktgen sample scripts · a4b6ade8
      Jesper Dangaard Brouer authored
      Since commit 0f06a678
      
       ("samples: Add an IPv6 '-6' option to the
      pktgen scripts") the newer pktgen_sampleXX script does show howto use
      IPv6 with pktgen.
      
      Thus, there is no longer a reason to keep the older sample scripts around.
      Signed-off-by: default avatarJesper Dangaard Brouer <brouer@redhat.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      a4b6ade8
    • Jesper Dangaard Brouer's avatar
      samples/pktgen: update sample03, no need for clones when bursting · 9efc44d7
      Jesper Dangaard Brouer authored
      
      
      Like sample05, don't use pktgen clone_skb feature when using 'burst' feature,
      it is not really needed.  This brings the burst users in sync.
      Signed-off-by: default avatarJesper Dangaard Brouer <brouer@redhat.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      9efc44d7
    • Robert Hoo's avatar
      samples/pktgen: add script pktgen_sample06_numa_awared_queue_irq_affinity.sh · 029e1ea6
      Robert Hoo authored
      
      
      This script simply does:
      
      * Detect $DEV's NUMA node belonging.
      
      * Bind each thread (processor of NUMA locality) with each $DEV queue's
        irq affinity, 1:1 mapping.
      
      * How many '-t' threads input determines how many queues will be utilized.
      
      If '-f' designates first cpu id, then offset in the NUMA node's cpu list.
      
      (Changes by Jesper: allow changing count from cmdline via '-n')
      Signed-off-by: default avatarRobert Hoo <robert.hu@intel.com>
      Signed-off-by: default avatarJesper Dangaard Brouer <brouer@redhat.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      029e1ea6
    • Robert Hoo's avatar
      samples/pktgen: Add some helper functions · 22ac5ad4
      Robert Hoo authored
      
      
      1. given a device, get its NUMA belongings
      2. given a device, get its queues' irq numbers.
      3. given a NUMA node, get its cpu id list.
      Signed-off-by: default avatarRobert Hoo <robert.hu@intel.com>
      Signed-off-by: default avatarJesper Dangaard Brouer <brouer@redhat.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      22ac5ad4
  7. 29 Oct, 2017 2 commits
  8. 28 Oct, 2017 1 commit
  9. 25 Oct, 2017 2 commits
  10. 22 Oct, 2017 2 commits
  11. 20 Oct, 2017 2 commits
  12. 19 Oct, 2017 3 commits
  13. 18 Oct, 2017 1 commit
    • Jesper Dangaard Brouer's avatar
      samples/bpf: add cpumap sample program xdp_redirect_cpu · fad3917e
      Jesper Dangaard Brouer authored
      
      
      This sample program show how to use cpumap and the associated
      tracepoints.
      
      It provides command line stats, which shows how the XDP-RX process,
      cpumap-enqueue and cpumap kthread dequeue is cooperating on a per CPU
      basis.  It also utilize the xdp_exception and xdp_redirect_err
      transpoints to allow users quickly to identify setup issues.
      
      One issue with ixgbe driver is that the driver reset the link when
      loading XDP.  This reset the procfs smp_affinity settings.  Thus,
      after loading the program, these must be reconfigured.  The easiest
      workaround it to reduce the RX-queue to e.g. two via:
      
       # ethtool --set-channels ixgbe1 combined 2
      
      And then add CPUs above 0 and 1, like:
      
       # xdp_redirect_cpu --dev ixgbe1 --prog 2 --cpu 2 --cpu 3 --cpu 4
      
      Another issue with ixgbe is that the page recycle mechanism is tied to
      the RX-ring size.  And the default setting of 512 elements is too
      small.  This is the same issue with regular devmap XDP_REDIRECT.
      To overcome this I've been using 1024 rx-ring size:
      
       # ethtool -G ixgbe1 rx 1024 tx 1024
      
      V3:
       - whitespace cleanups
       - bpf tracepoint cannot access top part of struct
      
      V4:
       - report on kthread sched events, according to tracepoint change
       - report average bulk enqueue size
      
      V5:
       - bpf_map_lookup_elem on cpumap not allowed from bpf_prog
         use separate map to mark CPUs not available
      
      V6:
       - correct kthread sched summary output
      
      V7:
       - Added a --stress-mode for concurrently changing underlying cpumap
      Signed-off-by: default avatarJesper Dangaard Brouer <brouer@redhat.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      fad3917e
  14. 17 Oct, 2017 1 commit
    • Steven Rostedt (VMware)'s avatar
      tracing/samples: Fix creation and deletion of simple_thread_fn creation · 6575257c
      Steven Rostedt (VMware) authored
      Commit 7496946a ("tracing: Add samples of DECLARE_EVENT_CLASS() and
      DEFINE_EVENT()") added template examples for all the events. It created a
      DEFINE_EVENT_FN() example which reused the foo_bar_reg and foo_bar_unreg
      functions.
      
      Enabling both the TRACE_EVENT_FN() and DEFINE_EVENT_FN() example trace
      events caused the foo_bar_reg to be called twice, creating the test thread
      twice. The foo_bar_unreg would remove it only once, even if it was called
      multiple times, leaving a thread existing when the module is unloaded,
      causing an oops.
      
      Add a ref count and allow foo_bar_reg() and foo_bar_unreg() be called by
      multiple trace events.
      
      Cc: stable@vger.kernel.org
      Fixes: 7496946a
      
       ("tracing: Add samples of DECLARE_EVENT_CLASS() and DEFINE_EVENT()")
      Signed-off-by: default avatarSteven Rostedt (VMware) <rostedt@goodmis.org>
      6575257c
  15. 16 Oct, 2017 1 commit
  16. 12 Oct, 2017 1 commit
  17. 07 Oct, 2017 2 commits
  18. 06 Oct, 2017 3 commits
  19. 04 Oct, 2017 1 commit