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    Subject[PATCH 2.6.19 3/4] ehca: Kconfig: activate scaling code as default to prevent drop packets (UD)
    Date
    Hello Roland!
    Here is a small patch of ehca's Kconfig that activates scaling code as default.
    After several measurements we saw that this feature prevents drop packets (UD)
    in stress situation. Thus, enabling it helps to improve ehca's bandwidth through
    ipoib.
    Thanks!
    Nam


    Signed-off-by: Hoang-Nam Nguyen <hnguyen@de.ibm.com>
    ---


    Kconfig | 1 +
    1 files changed, 1 insertion(+)


    diff --git a/drivers/infiniband/hw/ehca/Kconfig b/drivers/infiniband/hw/ehca/Kconfig
    index 922389b..727b10d 100644
    --- a/drivers/infiniband/hw/ehca/Kconfig
    +++ b/drivers/infiniband/hw/ehca/Kconfig
    @@ -10,6 +10,7 @@ config INFINIBAND_EHCA
    config INFINIBAND_EHCA_SCALING
    bool "Scaling support (EXPERIMENTAL)"
    depends on IBMEBUS && INFINIBAND_EHCA && HOTPLUG_CPU && EXPERIMENTAL
    + default y
    ---help---
    eHCA scaling support schedules the CQ callbacks to different CPUs.
    diff --git a/drivers/infiniband/hw/ehca/Kconfig b/drivers/infiniband/hw/ehca/Kconfig
    index 922389b..727b10d 100644
    --- a/drivers/infiniband/hw/ehca/Kconfig
    +++ b/drivers/infiniband/hw/ehca/Kconfig
    @@ -10,6 +10,7 @@ config INFINIBAND_EHCA
    config INFINIBAND_EHCA_SCALING
    bool "Scaling support (EXPERIMENTAL)"
    depends on IBMEBUS && INFINIBAND_EHCA && HOTPLUG_CPU && EXPERIMENTAL
    + default y
    ---help---
    eHCA scaling support schedules the CQ callbacks to different CPUs.
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