dma32_pool_size(5)     Itanium(R)-based System Only      dma32_pool_size(5)
                          Tunable Kernel Parameters



 NAME    [Toc]    [Back]
      dma32_pool_size - the amount of memory to reserve for the 32-bit DMA
      pool

 VALUES    [Toc]    [Back]
    Minimum
      0

    Maximum    [Toc]    [Back]
      4GB

    Default    [Toc]    [Back]
      256MB

      Specify an integer value.

 DESCRIPTION    [Toc]    [Back]
      This tunable specifies the amount of memory in the first 4GB of the
      physical address space to be reserved for DMA for 32-bit cards.  The
      memory is set aside at boot time and cannot be used for other
      purposes.  This is required only on some Itanium platforms.  On
      platforms where the 32-bit pool is not needed, this value is ignored.

      The value of this tunable should be set based on the number of 32-bit
      cards in the system and the type of cards.

    Related Parameters    [Toc]    [Back]
      None

 WARNINGS    [Toc]    [Back]
      All HP-UX kernel tunable parameters are release specific.  This
      parameter may be removed or have its meaning changed in future
      releases of HP-UX.

      Installation of optional kernel software, from HP or other vendors,
      may cause changes to tunable parameter values.  After installation,
      some tunable parameters may no longer be at the default or recommended
      values.  For information about the effects of installation on tunable
      values, consult the documentation for the kernel software being
      installed. For information about optional kernel software that was
      factory installed on your system, see HP-UX Release Notes at
      http://docs.hp.com.

 AUTHOR    [Toc]    [Back]
      dma32_pool_size was developed by HP.

 SEE ALSO    [Toc]    [Back]
      None


 Hewlett-Packard Company            - 1 -      HP-UX 11i Version 2: Sep 2004