Eric Lee / smarc-fsl-linux-kernel

11 Sep, 2009

2 commits

  • d62f843b2   block: make blk_iopoll_prep_sched() follow normal 0/1 return convention ... Browse Code »

    Return 0 if we successfully marked this iopoll structure as ours for
    scheduling, instead of 1.

    Signed-off-by: Jens Axboe

    Jens Axboe
     
  • 5e605b64a   block: add blk-iopoll, a NAPI like approach for block devices ... Browse Code »

    This borrows some code from NAPI and implements a polled completion
    mode for block devices. The idea is the same as NAPI - instead of
    doing the command completion when the irq occurs, schedule a dedicated
    softirq in the hopes that we will complete more IO when the iopoll
    handler is invoked. Devices have a budget of commands assigned, and will
    stay in polled mode as long as they continue to consume their budget
    from the iopoll softirq handler. If they do not, the device is set back
    to interrupt completion mode.

    This patch holds the core bits for blk-iopoll, device driver support
    sold separately.

    Signed-off-by: Jens Axboe

    Jens Axboe