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Date: Wed, 15 Jan 1997 10:58:43 -0800 (PST)
From: Bruce Evans <bde>
Message-Id: <199701151858.KAA17093@freefall.freebsd.org>
To: CVS-committers, cvs-all, cvs-sys
Subject: cvs commit:  src/sys/kern kern_fork.c
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bde         97/01/15 10:58:43

  Modified:    sys/kern  kern_fork.c
  Log:
  Fixed interrupt unmasking for child processes which I broke in
  rev.1.10 two years ago.  Children continued to run at splhigh()
  after returning from vm_fork().  This mainly affected kernel
  processes and init.  For ordinary processes, interrupts are normally
  unmasked a few instructions later after fork() returns (it may be
  important for syscall() not to reschedule the child processes).
  Kernel processes had workarounds for the problem.  Init manages to
  start because some routines "know" that it is safe to go to sleep
  despite their caller starting them at a high ipl.  Then its ipl
  gets fixed on its first normal return from a syscall.
  
  Revision  Changes    Path
  1.29      +1 -0      src/sys/kern/kern_fork.c