cvs commit: src/sys/kern kern_intr.c subr_witness.c src/sys/dev/random randomdev.c

[Mark Murray]

markm       2003/11/20 07:35:48 PST

  FreeBSD src repository

  Modified files:
    sys/kern             kern_intr.c subr_witness.c 
    sys/dev/random       randomdev.c 
  Log:
  Fix a major faux pas of mine. I was causing 2 very bad things to
  happen in interrupt context; 1) sleep locks, and 2) malloc/free
  calls.
  
  1) is fixed by using spin locks instead.
  
  2) is fixed by preallocating a FIFO (implemented with a STAILQ)
     and using elements from this FIFO instead. This turns out
     to be rather fast.
  
  OK'ed by:       re (scottl)
  Thanks to:      peter, jhb, rwatson, jake
  Apologies to:   *
  
  Revision  Changes    Path
  1.46      +56 -12    src/sys/dev/random/randomdev.c
  1.103     +0 -4      src/sys/kern/kern_intr.c
  1.165     +2 -0      src/sys/kern/subr_witness.c