Eric Lee / smarc-fsl-linux-kernel

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
     

16 May, 2017

1 commit

  • baae03a0e   async_tx: Fix DMA_PREP_FENCE usage in do_async_gen_syndrome() ... Browse Code »

    The DMA_PREP_FENCE is to be used when preparing Tx descriptor if output
    of Tx descriptor is to be used by next/dependent Tx descriptor.

    The DMA_PREP_FENSE will not be set correctly in do_async_gen_syndrome()
    when calling dma->device_prep_dma_pq() under following conditions:
    1. ASYNC_TX_FENCE not set in submit->flags
    2. DMA_PREP_FENCE not set in dma_flags
    3. src_cnt (= (disks - 2)) is greater than dma_maxpq(dma, dma_flags)

    This patch fixes DMA_PREP_FENCE usage in do_async_gen_syndrome() taking
    inspiration from do_async_xor() implementation.

    Signed-off-by: Anup Patel
    Reviewed-by: Ray Jui
    Reviewed-by: Scott Branden
    Acked-by: Dan Williams
    Signed-off-by: Vinod Koul

    Anup Patel
     

05 Oct, 2016

1 commit

  • c84750906   async_pq_val: fix DMA memory leak ... Browse Code »

    Add missing dmaengine_unmap_put(), so we don't OOM during RAID6 sync.

    Fixes: 1786b943dad0 ("async_pq_val: convert to dmaengine_unmap_data")
    Signed-off-by: Justin Maggard
    Reviewed-by: Dan Williams
    Cc:
    Signed-off-by: Vinod Koul

    Justin Maggard
     

18 Mar, 2016

1 commit

  • 95813b8fa   mm/page_ref: add tracepoint to track down page reference manipulation ... Browse Code »

    CMA allocation should be guaranteed to succeed by definition, but,
    unfortunately, it would be failed sometimes. It is hard to track down
    the problem, because it is related to page reference manipulation and we
    don't have any facility to analyze it.

    This patch adds tracepoints to track down page reference manipulation.
    With it, we can find exact reason of failure and can fix the problem.
    Following is an example of tracepoint output. (note: this example is
    stale version that printing flags as the number. Recent version will
    print it as human readable string.)

    -9018 [004] 92.678375: page_ref_set: pfn=0x17ac9 flags=0x0 count=1 mapcount=0 mapping=(nil) mt=4 val=1
    -9018 [004] 92.678378: kernel_stack:
    => get_page_from_freelist (ffffffff81176659)
    => __alloc_pages_nodemask (ffffffff81176d22)
    => alloc_pages_vma (ffffffff811bf675)
    => handle_mm_fault (ffffffff8119e693)
    => __do_page_fault (ffffffff810631ea)
    => trace_do_page_fault (ffffffff81063543)
    => do_async_page_fault (ffffffff8105c40a)
    => async_page_fault (ffffffff817581d8)
    [snip]
    -9018 [004] 92.678379: page_ref_mod: pfn=0x17ac9 flags=0x40048 count=2 mapcount=1 mapping=0xffff880015a78dc1 mt=4 val=1
    [snip]
    ...
    ...
    -9131 [001] 93.174468: test_pages_isolated: start_pfn=0x17800 end_pfn=0x17c00 fin_pfn=0x17ac9 ret=fail
    [snip]
    -9018 [004] 93.174843: page_ref_mod_and_test: pfn=0x17ac9 flags=0x40068 count=0 mapcount=0 mapping=0xffff880015a78dc1 mt=4 val=-1 ret=1
    => release_pages (ffffffff8117c9e4)
    => free_pages_and_swap_cache (ffffffff811b0697)
    => tlb_flush_mmu_free (ffffffff81199616)
    => tlb_finish_mmu (ffffffff8119a62c)
    => exit_mmap (ffffffff811a53f7)
    => mmput (ffffffff81073f47)
    => do_exit (ffffffff810794e9)
    => do_group_exit (ffffffff81079def)
    => SyS_exit_group (ffffffff81079e74)
    => entry_SYSCALL_64_fastpath (ffffffff817560b6)

    This output shows that problem comes from exit path. In exit path, to
    improve performance, pages are not freed immediately. They are gathered
    and processed by batch. During this process, migration cannot be
    possible and CMA allocation is failed. This problem is hard to find
    without this page reference tracepoint facility.

    Enabling this feature bloat kernel text 30 KB in my configuration.

    text data bss dec hex filename
    12127327 2243616 1507328 15878271 f2487f vmlinux_disabled
    12157208 2258880 1507328 15923416 f2f8d8 vmlinux_enabled

    Note that, due to header file dependency problem between mm.h and
    tracepoint.h, this feature has to open code the static key functions for
    tracepoints. Proposed by Steven Rostedt in following link.

    https://lkml.org/lkml/2015/12/9/699

    [arnd@arndb.de: crypto/async_pq: use __free_page() instead of put_page()]
    [iamjoonsoo.kim@lge.com: fix build failure for xtensa]
    [akpm@linux-foundation.org: tweak Kconfig text, per Vlastimil]
    Signed-off-by: Joonsoo Kim
    Acked-by: Michal Nazarewicz
    Acked-by: Vlastimil Babka
    Cc: Minchan Kim
    Cc: Mel Gorman
    Cc: "Kirill A. Shutemov"
    Cc: Sergey Senozhatsky
    Acked-by: Steven Rostedt
    Signed-off-by: Arnd Bergmann
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Joonsoo Kim
     

07 Jan, 2016

1 commit

  • b02bab6b0   async_tx: use GFP_NOWAIT rather than GFP_IO ... Browse Code »

    These async_XX functions are called from md/raid5 in an atomic
    section, between get_cpu() and put_cpu(), so they must not sleep.
    So use GFP_NOWAIT rather than GFP_IO.

    Dan Williams writes: Longer term async_tx needs to be merged into md
    directly as we can allocate this unmap data statically per-stripe
    rather than per request.

    Fixed: 7476bd79fc01 ("async_pq: convert to dmaengine_unmap_data")
    Cc: stable@vger.kernel.org (v3.13+)
    Reported-and-tested-by: Stanislav Samsonov
    Acked-by: Dan Williams
    Signed-off-by: NeilBrown
    Signed-off-by: Vinod Koul

    NeilBrown
     

22 Apr, 2015

1 commit

  • 584acdd49   md/raid5: activate raid6 rmw feature ... Browse Code »

    Glue it altogehter. The raid6 rmw path should work the same as the
    already existing raid5 logic. So emulate the prexor handling/flags
    and split functions as needed.

    1) Enable xor_syndrome() in the async layer.

    2) Split ops_run_prexor() into RAID4/5 and RAID6 logic. Xor the syndrome
    at the start of a rmw run as we did it before for the single parity.

    3) Take care of rmw run in ops_run_reconstruct6(). Again process only
    the changed pages to get syndrome back into sync.

    4) Enhance set_syndrome_sources() to fill NULL pages if we are in a rmw
    run. The lower layers will calculate start & end pages from that and
    call the xor_syndrome() correspondingly.

    5) Adapt the several places where we ignored Q handling up to now.

    Performance numbers for a single E5630 system with a mix of 10 7200k
    desktop/server disks. 300 seconds random write with 8 threads onto a
    3,2TB (10*400GB) RAID6 64K chunk without spare (group_thread_cnt=4)

    bsize rmw_level=1 rmw_level=0 rmw_level=1 rmw_level=0
    skip_copy=1 skip_copy=1 skip_copy=0 skip_copy=0
    4K 115 KB/s 141 KB/s 165 KB/s 140 KB/s
    8K 225 KB/s 275 KB/s 324 KB/s 274 KB/s
    16K 434 KB/s 536 KB/s 640 KB/s 534 KB/s
    32K 751 KB/s 1,051 KB/s 1,234 KB/s 1,045 KB/s
    64K 1,339 KB/s 1,958 KB/s 2,282 KB/s 1,962 KB/s
    128K 2,673 KB/s 3,862 KB/s 4,113 KB/s 3,898 KB/s
    256K 7,685 KB/s 7,539 KB/s 7,557 KB/s 7,638 KB/s
    512K 19,556 KB/s 19,558 KB/s 19,652 KB/s 19,688 Kb/s

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

    Markus Stockhausen
     

22 Aug, 2014

1 commit

16 Nov, 2013

1 commit

  • df12a3178   Merge commit 'dmaengine-3.13-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/dmaengine ... Browse Code »

    Pull dmaengine changes from Dan

    1/ Bartlomiej and Dan finalized a rework of the dma address unmap
    implementation.

    2/ In the course of testing 1/ a collection of enhancements to dmatest
    fell out. Notably basic performance statistics, and fixed / enhanced
    test control through new module parameters 'run', 'wait', 'noverify',
    and 'verbose'. Thanks to Andriy and Linus for their review.

    3/ Testing the raid related corner cases of 1/ triggered bugs in the
    recently added 16-source operation support in the ioatdma driver.

    4/ Some minor fixes / cleanups to mv_xor and ioatdma.

    Conflicts:
    drivers/dma/dmatest.c

    Signed-off-by: Vinod Koul

    Vinod Koul
     

15 Nov, 2013

8 commits

  • 09ec0f583   raid6test: add new corner case for ioatdma driver ... Browse Code »

    With 24 disks and an ioatdma instance with 16 source support there is a
    corner case where the driver needs to be careful to account for the
    number of implied sources in the continuation case.

    Also bump the default case to test more than 16 sources now that it
    triggers different paths in offload drivers.

    Cc: Dave Jiang
    Acked-by: Dave Jiang
    Signed-off-by: Dan Williams

    Dan Williams
     
  • 0776ae7b8   dmaengine: remove DMA unmap flags ... Browse Code »

    Remove no longer needed DMA unmap flags:
    - DMA_COMPL_SKIP_SRC_UNMAP
    - DMA_COMPL_SKIP_DEST_UNMAP
    - DMA_COMPL_SRC_UNMAP_SINGLE
    - DMA_COMPL_DEST_UNMAP_SINGLE

    Cc: Vinod Koul
    Cc: Tomasz Figa
    Cc: Dave Jiang
    Signed-off-by: Bartlomiej Zolnierkiewicz
    Signed-off-by: Kyungmin Park
    Acked-by: Jon Mason
    Acked-by: Mark Brown
    [djbw: clean up straggling skip unmap flags in ntb]
    Signed-off-by: Dan Williams

    Bartlomiej Zolnierkiewicz
     
  • 1786b943d   async_pq_val: convert to dmaengine_unmap_data ... Browse Code »

    Use the generic unmap object to unmap dma buffers.

    Cc: Vinod Koul
    Cc: Tomasz Figa
    Cc: Dave Jiang
    Reported-by: Bartlomiej Zolnierkiewicz
    Signed-off-by: Bartlomiej Zolnierkiewicz
    Signed-off-by: Kyungmin Park
    Signed-off-by: Dan Williams

    Dan Williams
     
  • 7476bd79f   async_pq: convert to dmaengine_unmap_data ... Browse Code »

    Use the generic unmap object to unmap dma buffers.

    Cc: Vinod Koul
    Cc: Tomasz Figa
    Cc: Dave Jiang
    Reported-by: Bartlomiej Zolnierkiewicz
    [bzolnier: keep temporary dma_dest array in do_async_gen_syndrome()]
    Signed-off-by: Bartlomiej Zolnierkiewicz
    Signed-off-by: Kyungmin Park
    Signed-off-by: Dan Williams

    Dan Williams
     
  • 3bbdd4987   async_raid6_recov: convert to dmaengine_unmap_data ... Browse Code »

    Use the generic unmap object to unmap dma buffers.

    Cc: Vinod Koul
    Cc: Tomasz Figa
    Cc: Dave Jiang
    Reported-by: Bartlomiej Zolnierkiewicz
    [bzolnier: keep temporary dma_dest array in async_mult()]
    Signed-off-by: Bartlomiej Zolnierkiewicz
    Signed-off-by: Kyungmin Park
    Signed-off-by: Dan Williams

    Dan Williams
     
  • 173e86b28   async_xor_val: convert to dmaengine_unmap_data ... Browse Code »

    Use the generic unmap object to unmap dma buffers.

    Cc: Vinod Koul
    Cc: Tomasz Figa
    Cc: Dave Jiang
    Reported-by: Bartlomiej Zolnierkiewicz
    [bzolnier: minor cleanups]
    Signed-off-by: Bartlomiej Zolnierkiewicz
    Signed-off-by: Kyungmin Park
    Signed-off-by: Dan Williams

    Dan Williams
     
  • fb36ab142   async_xor: convert to dmaengine_unmap_data ... Browse Code »

    Use the generic unmap object to unmap dma buffers.

    Later we can push this unmap object up to the raid layer and get rid of
    the 'scribble' parameter.

    Cc: Vinod Koul
    Cc: Tomasz Figa
    Cc: Dave Jiang
    Reported-by: Bartlomiej Zolnierkiewicz
    [bzolnier: minor cleanups]
    Signed-off-by: Bartlomiej Zolnierkiewicz
    Signed-off-by: Kyungmin Park
    Signed-off-by: Dan Williams

    Dan Williams
     
  • 897164629   async_memcpy: convert to dmaengine_unmap_data ... Browse Code »

    Use the generic unmap object to unmap dma buffers.

    Cc: Vinod Koul
    Cc: Tomasz Figa
    Cc: Dave Jiang
    Reported-by: Bartlomiej Zolnierkiewicz
    [bzolnier: add missing unmap->len initialization]
    [bzolnier: fix whitespace damage]
    Signed-off-by: Bartlomiej Zolnierkiewicz
    Signed-off-by: Kyungmin Park
    [djbw: add DMA_ENGINE=n support]
    Signed-off-by: Dan Williams

    Dan Williams
     

25 Oct, 2013

1 commit

04 Jul, 2013

1 commit

  • 48a9db462   drivers/dma: remove unused support for MEMSET operations ... Browse Code »

    There have never been any real users of MEMSET operations since they
    have been introduced in January 2007 by commit 7405f74badf4 ("dmaengine:
    refactor dmaengine around dma_async_tx_descriptor"). Therefore remove
    support for them for now, it can be always brought back when needed.

    [sebastian.hesselbarth@gmail.com: fix drivers/dma/mv_xor]
    Signed-off-by: Bartlomiej Zolnierkiewicz
    Signed-off-by: Kyungmin Park
    Signed-off-by: Sebastian Hesselbarth
    Cc: Vinod Koul
    Acked-by: Dan Williams
    Cc: Tomasz Figa
    Cc: Herbert Xu
    Cc: Olof Johansson
    Cc: Kevin Hilman
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Bartlomiej Zolnierkiewicz
     

30 Apr, 2013

1 commit

08 Jan, 2013

4 commits

20 Mar, 2012

1 commit

01 Nov, 2011

1 commit

22 Jun, 2011

1 commit

  • b7f080cfe   net: remove mm.h inclusion from netdevice.h ... Browse Code »

    Remove linux/mm.h inclusion from netdevice.h -- it's unused (I've checked manually).

    To prevent mm.h inclusion via other channels also extract "enum dma_data_direction"
    definition into separate header. This tiny piece is what gluing netdevice.h with mm.h
    via "netdevice.h => dmaengine.h => dma-mapping.h => scatterlist.h => mm.h".
    Removal of mm.h from scatterlist.h was tried and was found not feasible
    on most archs, so the link was cutoff earlier.

    Hope people are OK with tiny include file.

    Note, that mm_types.h is still dragged in, but it is a separate story.

    Signed-off-by: Alexey Dobriyan
    Signed-off-by: David S. Miller

    Alexey Dobriyan
     

31 Mar, 2011

1 commit

28 Oct, 2010

1 commit

  • e3e1288e8   Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx ... Browse Code »

    * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx: (48 commits)
    DMAENGINE: move COH901318 to arch_initcall
    dma: imx-dma: fix signedness bug
    dma/timberdale: simplify conditional
    ste_dma40: remove channel_type
    ste_dma40: remove enum for endianess
    ste_dma40: remove TIM_FOR_LINK option
    ste_dma40: move mode_opt to separate config
    ste_dma40: move channel mode to a separate field
    ste_dma40: move priority to separate field
    ste_dma40: add variable to indicate valid dma_cfg
    async_tx: make async_tx channel switching opt-in
    move async raid6 test to lib/Kconfig.debug
    dmaengine: Add Freescale i.MX1/21/27 DMA driver
    intel_mid_dma: change the slave interface
    intel_mid_dma: fix the WARN_ONs
    intel_mid_dma: Add sg list support to DMA driver
    intel_mid_dma: Allow DMAC2 to share interrupt
    intel_mid_dma: Allow IRQ sharing
    intel_mid_dma: Add runtime PM support
    DMAENGINE: define a dummy filter function for ste_dma40
    ...

    Linus Torvalds
     

27 Oct, 2010

1 commit

  • 61ecdb801   mm: strictly nested kmap_atomic() ... Browse Code »

    Ensure kmap_atomic() usage is strictly nested

    Signed-off-by: Peter Zijlstra
    Reviewed-by: Rik van Riel
    Acked-by: Chris Metcalf
    Cc: David Howells
    Cc: Hugh Dickins
    Cc: Ingo Molnar
    Cc: Thomas Gleixner
    Cc: "H. Peter Anvin"
    Cc: Steven Rostedt
    Cc: Russell King
    Cc: Ralf Baechle
    Cc: David Miller
    Cc: Paul Mackerras
    Cc: Benjamin Herrenschmidt
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Peter Zijlstra
     

08 Oct, 2010

1 commit

  • 400fb7f6a   move async raid6 test to lib/Kconfig.debug ... Browse Code »

    The prompt for "Self test for hardware accelerated raid6 recovery" does not
    belong in the top level configuration menu. All the options in
    crypto/async_tx/Kconfig are selected and do not depend on CRYPTO.
    Kconfig.debug seems like a reasonable fit.

    Cc: Herbert Xu
    Cc: David Woodhouse
    Signed-off-by: Dan Williams

    Dan Williams
     

09 Aug, 2010

1 commit

22 May, 2010

1 commit

  • 6f68fbaaf   Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx ... Browse Code »

    * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx:
    DMAENGINE: extend the control command to include an arg
    async_tx: trim dma_async_tx_descriptor in 'no channel switch' case
    DMAENGINE: DMA40 fix for allocation of logical channel 0
    DMAENGINE: DMA40 support paused channel status
    dmaengine: mpc512x: Use resource_size
    DMA ENGINE: Do not reset 'private' of channel
    ioat: Remove duplicated devm_kzalloc() calls for ioatdma_device
    ioat3: disable cacheline-unaligned transfers for raid operations
    ioat2,3: convert to producer/consumer locking
    ioat: convert to circ_buf
    DMAENGINE: Support for ST-Ericssons DMA40 block v3
    async_tx: use of kzalloc/kfree requires the include of slab.h
    dmaengine: provide helper for setting txstate
    DMAENGINE: generic channel status v2
    DMAENGINE: generic slave control v2
    dma: timb-dma: Update comment and fix compiler warning
    dma: Add timb-dma
    DMAENGINE: COH 901 318 fix bytesleft
    DMAENGINE: COH 901 318 rename confusing vars

    Linus Torvalds
     

18 May, 2010

1 commit

05 May, 2010

1 commit

  • 5157b4aa5   raid6: fix recovery performance regression ... Browse Code »

    The raid6 recovery code should immediately drop back to the optimized
    synchronous path when a p+q dma resource is not available. Otherwise we
    run the non-optimized/multi-pass async code in sync mode.

    Verified with raid6test (NDISKS=255)

    Applies to kernels >= 2.6.32.

    Cc:
    Acked-by: NeilBrown
    Reported-by: H. Peter Anvin
    Signed-off-by: Dan Williams
    Signed-off-by: Linus Torvalds

    Dan Williams
     

30 Mar, 2010

1 commit

  • 5a0e3ad6a   include cleanup: Update gfp.h and slab.h includes to prepare for breaking implic… ... Browse Code »

    …it slab.h inclusion from percpu.h

    percpu.h is included by sched.h and module.h and thus ends up being
    included when building most .c files. percpu.h includes slab.h which
    in turn includes gfp.h making everything defined by the two files
    universally available and complicating inclusion dependencies.

    percpu.h -> slab.h dependency is about to be removed. Prepare for
    this change by updating users of gfp and slab facilities include those
    headers directly instead of assuming availability. As this conversion
    needs to touch large number of source files, the following script is
    used as the basis of conversion.

    http://userweb.kernel.org/~tj/misc/slabh-sweep.py

    The script does the followings.

    * Scan files for gfp and slab usages and update includes such that
    only the necessary includes are there. ie. if only gfp is used,
    gfp.h, if slab is used, slab.h.

    * When the script inserts a new include, it looks at the include
    blocks and try to put the new include such that its order conforms
    to its surrounding. It's put in the include block which contains
    core kernel includes, in the same order that the rest are ordered -
    alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
    doesn't seem to be any matching order.

    * If the script can't find a place to put a new include (mostly
    because the file doesn't have fitting include block), it prints out
    an error message indicating which .h file needs to be added to the
    file.

    The conversion was done in the following steps.

    1. The initial automatic conversion of all .c files updated slightly
    over 4000 files, deleting around 700 includes and adding ~480 gfp.h
    and ~3000 slab.h inclusions. The script emitted errors for ~400
    files.

    2. Each error was manually checked. Some didn't need the inclusion,
    some needed manual addition while adding it to implementation .h or
    embedding .c file was more appropriate for others. This step added
    inclusions to around 150 files.

    3. The script was run again and the output was compared to the edits
    from #2 to make sure no file was left behind.

    4. Several build tests were done and a couple of problems were fixed.
    e.g. lib/decompress_*.c used malloc/free() wrappers around slab
    APIs requiring slab.h to be added manually.

    5. The script was run on all .h files but without automatically
    editing them as sprinkling gfp.h and slab.h inclusions around .h
    files could easily lead to inclusion dependency hell. Most gfp.h
    inclusion directives were ignored as stuff from gfp.h was usually
    wildly available and often used in preprocessor macros. Each
    slab.h inclusion directive was examined and added manually as
    necessary.

    6. percpu.h was updated not to include slab.h.

    7. Build test were done on the following configurations and failures
    were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
    distributed build env didn't work with gcov compiles) and a few
    more options had to be turned off depending on archs to make things
    build (like ipr on powerpc/64 which failed due to missing writeq).

    * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
    * powerpc and powerpc64 SMP allmodconfig
    * sparc and sparc64 SMP allmodconfig
    * ia64 SMP allmodconfig
    * s390 SMP allmodconfig
    * alpha SMP allmodconfig
    * um on x86_64 SMP allmodconfig

    8. percpu.h modifications were reverted so that it could be applied as
    a separate patch and serve as bisection point.

    Given the fact that I had only a couple of failures from tests on step
    6, I'm fairly confident about the coverage of this conversion patch.
    If there is a breakage, it's likely to be something in one of the arch
    headers which should be easily discoverable easily on most builds of
    the specific arch.

    Signed-off-by: Tejun Heo <tj@kernel.org>
    Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
    Cc: Ingo Molnar <mingo@redhat.com>
    Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>

    Tejun Heo
     

18 Dec, 2009

1 commit

20 Nov, 2009

1 commit

  • 7b3cc2b1f   async_tx: build-time toggling of async_{syndrome,xor}_val dma support ... Browse Code »

    ioat3.2 does not support asynchronous error notifications which makes
    the driver experience latencies when non-zero pq validate results are
    expected. Provide a mechanism for turning off async_xor_val and
    async_syndrome_val via Kconfig. This approach is generally useful for
    any driver that specifies ASYNC_TX_DISABLE_CHANNEL_SWITCH and would like
    to force the async_tx api to fall back to the synchronous path for
    certain operations.

    Signed-off-by: Dan Williams

    Dan Williams
     

30 Oct, 2009

1 commit

20 Oct, 2009

2 commits

  • da17bf430   async_tx: fix asynchronous raid6 recovery for ddf layouts ... Browse Code »

    The raid6 recovery code currently requires special handling of the
    4-disk and 5-disk recovery scenarios for the native layout. Quoting
    from commit 0a82a623:

    In these situations the default N-disk algorithm will present
    0-source or 1-source operations to dma devices. To cover for
    dma devices where the minimum source count is 2 we implement
    4-disk and 5-disk handling in the recovery code.

    The ddf layout presents disks=6 and disks=7 to the recovery code in
    these situations. Instead of looking at the number of disks count the
    number of non-zero sources in the list and call the special case code
    when the number of non-failed sources is 0 or 1.

    [neilb@suse.de: replace 'ddf' flag with counting good sources]
    Signed-off-by: Dan Williams

    Dan Williams
     
  • 030b07720   async_pq: rename scribble page ... Browse Code »

    The global scribble page is used as a temporary destination buffer when
    disabling the P or Q result is requested. The local scribble buffer
    contains memory for performing address conversions. Rename the global
    variable to avoid confusion.

    Signed-off-by: Dan Williams

    Dan Williams