From owner-cvs-all  Mon Feb  5 11:34:46 2001
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From: John Baldwin <jhb@FreeBSD.org>
Date: Mon, 5 Feb 2001 11:34:25 -0800 (PST)
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: cvs commit: src/sys/alpha/alpha interrupt.c
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jhb         2001/02/05 11:34:25 PST

  Modified files:
    sys/alpha/alpha      interrupt.c 
  Log:
  - Minimize the amount of duplicated code for the PREEMPTION #ifdef, it now
    only covers about 3-4 lines.
  - Don't lower the IPL while we are on the interrupt stack.  Instead, save
    the raised IPL and change the saved IPL in sched_lock to IPL_0 before
    calling mi_switch().  When we are resumed, restore the saved IPL in
    sched_lock to the saved raised IPL so that when we release sched_lock
    we won't lower the IPL.  Without this, we would get nested interrupts
    that would overflow the kernel stack.
  
  Tested by:	mjacob
  
  Revision  Changes    Path
  1.38      +10 -28    src/sys/alpha/alpha/interrupt.c



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