lkml.org 
[lkml]   [2007]   [Aug]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    From
    Date
    Subject[PATCH 0/3] pci: let devices flush DMA to host memory

    On Altix, DMA may be reordered within the NUMA interconnect.
    This can be a problem with Infiniband, where DMA to Completion
    Queues can race with data DMA. This patchset allows a driver
    to associate a memory region with a "dmaflush" attribute, so
    that writes to the memory region flush in-flight DMA, preventing
    the CQ/data race.

    There are three patches in this set:

    [1/3]: add pci_dma_flags_set_dmaflush() to pci interface
    [2/3]: redefine pci_dma_flags_set_dmaflush() for sn-ia64
    [3/3]: document pci_dma_flags_set_dmaflush()

    And there would be additional patches to IB drivers to make use
    of the interface, of course.

    --
    Arthur

    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2007-08-24 20:07    [W:0.019 / U:29.496 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site