Eric Lee / smarc-fsl-linux-kernel

27 Nov, 2018

1 commit

  • 615a30e8d   lib/raid6: Fix arm64 test build ... Browse Code »

    [ Upstream commit 313a06e636808387822af24c507cba92703568b1 ]

    The lib/raid6/test fails to build the neon objects
    on arm64 because the correct machine type is 'aarch64'.

    Once this is correctly enabled, the neon recovery objects
    need to be added to the build.

    Reviewed-by: Ard Biesheuvel
    Signed-off-by: Jeremy Linton
    Signed-off-by: Catalin Marinas
    Signed-off-by: Sasha Levin

    Jeremy Linton
     

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
     

27 Sep, 2016

1 commit

  • 099b548c4   raid6/test/test.c: bug fix: Specify aligned(alignment) attributes to the char arrays ... Browse Code »

    Specifying the aligned attributes to the char data[NDISKS][PAGE_SIZE],
    char recovi[PAGE_SIZE] and char recovi[PAGE_SIZE] arrays, so that all
    malloc memory is page boundary aligned.

    Without these alignment attributes, the test causes a segfault in
    userspace when the NDISKS are changed to 4 from 16.

    The RAID stripes will be page aligned anyway, so we want to test what
    the kernel actually will execute.

    Cc: H. Peter Anvin
    Cc: Yu-cheng Yu
    Signed-off-by: Gayatri Kammela
    Reviewed-by: H. Peter Anvin
    Signed-off-by: Shaohua Li

    Gayatri Kammela
     

22 Sep, 2016

1 commit

22 Apr, 2015

1 commit

  • 7e92e1d76   md/raid6 algorithms: improve test program ... Browse Code »

    It is always helpful to have a test tool in place if we implement
    new data critical algorithms. So add some test routines to the raid6
    checker that can prove if the new xor_syndrome() works as expected.

    Run through all permutations of start/stop pages per algorithm and
    simulate a xor_syndrome() assisted rmw run. After each rmw check if
    the recovery algorithm still confirms that the stripe is fine.

    Signed-off-by: Markus Stockhausen
    Signed-off-by: NeilBrown

    Markus Stockhausen
     

11 Sep, 2013

1 commit

  • 4d7696f1b   Merge tag 'md/3.12' of git://neil.brown.name/md ... Browse Code »

    Pull md update from Neil Brown:
    "Headline item is multithreading for RAID5 so that more IO/sec can be
    supported on fast (SSD) devices. Also TILE-Gx SIMD suppor for RAID6
    calculations and an assortment of bug fixes"

    * tag 'md/3.12' of git://neil.brown.name/md:
    raid5: only wakeup necessary threads
    md/raid5: flush out all pending requests before proceeding with reshape.
    md/raid5: use seqcount to protect access to shape in make_request.
    raid5: sysfs entry to control worker thread number
    raid5: offload stripe handle to workqueue
    raid5: fix stripe release order
    raid5: make release_stripe lockless
    md: avoid deadlock when dirty buffers during md_stop.
    md: Don't test all of mddev->flags at once.
    md: Fix apparent cut-and-paste error in super_90_validate
    raid6/test: replace echo -e with printf
    RAID: add tilegx SIMD implementation of raid6
    md: fix safe_mode buglet.
    md: don't call md_allow_write in get_bitmap_file.

    Linus Torvalds
     

27 Aug, 2013

2 commits

  • c28399b59   raid6/test: replace echo -e with printf ... Browse Code »

    -e is a non-standard echo option, echo output is
    implementation-dependent when it is used. Replace echo -e with printf as
    suggested by POSIX echo manual.

    Cc: NeilBrown
    Cc: Jim Kukunas
    Cc: "H. Peter Anvin"
    Cc: Yuanhan Liu
    Acked-by: H. Peter Anvin
    Signed-off-by: Max Filippov
    Signed-off-by: NeilBrown

    Max Filippov
     
  • ae77cbc1e   RAID: add tilegx SIMD implementation of raid6 ... Browse Code »

    This change adds TILE-Gx SIMD instructions to the software raid
    (md), modeling the Altivec implementation. This is only for Syndrome
    generation; there is more that could be done to improve recovery,
    as in the recent Intel SSE3 recovery implementation.

    The code unrolls 8 times; this turns out to be the best on tilegx
    hardware among the set 1, 2, 4, 8 or 16. The code reads one
    cache-line of data from each disk, stores P and Q then goes to the
    next cache-line.

    The test code in sys/linux/lib/raid6/test reports 2008 MB/s data
    read rate for syndrome generation using 18 disks (16 data and 2
    parity). It was 1512 MB/s before this SIMD optimizations. This is
    running on 1 core with all the data in cache.

    This is based on the paper The Mathematics of RAID-6.
    (http://kernel.org/pub/linux/kernel/people/hpa/raid6.pdf).

    Signed-off-by: Ken Steele
    Signed-off-by: Chris Metcalf
    Signed-off-by: NeilBrown

    Ken Steele
     

09 Jul, 2013

1 commit

  • 7d11965dd   lib/raid6: add ARM-NEON accelerated syndrome calculation ... Browse Code »

    Rebased/reworked a patch contributed by Rob Herring that uses
    NEON intrinsics to perform the RAID-6 syndrome calculations.
    It uses the existing unroll.awk code to generate several
    unrolled versions of which the best performing one is selected
    at boot time.

    Signed-off-by: Ard Biesheuvel
    Acked-by: Nicolas Pitre
    Cc: hpa@linux.intel.com

    Ard Biesheuvel
     

13 Dec, 2012

3 commits

22 May, 2012

1 commit

11 Aug, 2010

1 commit