• Christoph Lameter's avatar
    [PATCH] mmtimer driver update: add SHub interrupt support · 8387d3cd
    Christoph Lameter authored
    - mmtimer: add support for the use of hardware timers on SGI SHubs (sn
      subarch) via the posix timer interface.
    
    - Allows the scheduling of up to 3 hardware interrupts per node to
      deliver signals to processes running on those nodes.
    
    - Periodic timers in user space capable of supporting intervals down to
      10us (<10us supported but will usually result in excessive overruns).
    
    - Scheduling accuracy of 40ns.  (However, typically it takes at least a
      few usecs for an interrupt to be forwarded to a signal in user space.)
    
    - Add missing SHub information to include/asm-ia64/sn/shub_mmr.h
    
    - Reserve timer interrupt used in include/asm-ia64/sn/intr.h
    Signed-off-by: default avatarChristoph Lameter <clameter@sgi.com>
    Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
    8387d3cd
shub_mmr.h 21.4 KB