From owner-cvs-all  Wed Jan 31 19:34:48 2001
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From: Jake Burkholder <jake@FreeBSD.org>
Date: Wed, 31 Jan 2001 19:34:21 -0800 (PST)
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: cvs commit: src/sys/alpha/alpha interrupt.c machdep.c
         src/sys/i386/isa ithread.c npx.c
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jake        2001/01/31 19:34:21 PST

  Modified files:
    sys/alpha/alpha      interrupt.c machdep.c 
    sys/i386/isa         ithread.c npx.c 
  Log:
  Implement preemptive scheduling of hardware interrupt threads.
  
  - If possible, context switch to the thread directly in sched_ithd(),
    rather than triggering a delayed ast reschedule.
  
  - Disable interrupts while restoring fpu state in the trap handler,
    in order to ensure that we are not preempted in the middle, which
    could cause migration to another cpu.
  
  Reviewed by:	peter
  Tested by:	peter (alpha)
  
  Revision  Changes    Path
  1.36      +13 -9     src/sys/alpha/alpha/interrupt.c
  1.111     +16 -1     src/sys/alpha/alpha/machdep.c
  1.11      +7 -3      src/sys/i386/isa/ithread.c
  1.90      +6 -1      src/sys/i386/isa/npx.c



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