1. 17 12月, 2005 1 次提交
    • J
      [IA64] disable preemption in udelay() · f5899b5d
      John Hawkes 提交于
      The udelay() inline for ia64 uses the ITC.  If CONFIG_PREEMPT is enabled
      and the platform has unsynchronized ITCs and the calling task migrates
      to another CPU while doing the udelay loop, then the effective delay may
      be too short or very, very long.
      
      This patch disables preemption around 100 usec chunks of the overall
      desired udelay time.  This minimizes preemption-holdoffs.
      
      udelay() is now too big to be inline, move it out of line and export it.
      Signed-off-by: NJohn Hawkes <hawkes@sgi.com>
      Signed-off-by: NTony Luck <tony.luck@intel.com>
      f5899b5d
  2. 16 12月, 2005 33 次提交
  3. 15 12月, 2005 6 次提交