• Kenji Kaneshige's avatar
    [IA64] vector sharing (Large I/O system support) · 24eeb568
    Kenji Kaneshige authored
    Current ia64 linux cannot handle greater than 184 interrupt sources
    because of the lack of vectors. The following patch enables ia64 linux
    to handle greater than 184 interrupt sources by allowing the same
    vector number to be shared by multiple IOSAPIC's RTEs. The design of
    this patch is besed on "Intel(R) Itanium(R) Processor Family Interrupt
    Architecture Guide".
    
    Even if you don't have a large I/O system, you can see the behavior of
    vector sharing by changing IOSAPIC_LAST_DEVICE_VECTOR to fewer value.
    Signed-off-by: default avatarKenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
    Signed-off-by: default avatarTony Luck <tony.luck@intel.com>
    24eeb568
irq_ia64.c 6.66 KB