From owner-cvs-all  Sat Jan 20 13:29:33 2001
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From: Bosko Milekic <bmilekic@FreeBSD.org>
Date: Sat, 20 Jan 2001 13:29:10 -0800 (PST)
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: cvs commit: src/sys/kern uipc_mbuf.c src/sys/sys mbuf.h
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bmilekic    2001/01/20 13:29:10 PST

  Modified files:
    sys/kern             uipc_mbuf.c 
    sys/sys              mbuf.h 
  Log:
  When short of mbufs or mbuf clusters, we sleep on appropriate "counters."
  The counters are incremented when a thread goes to sleep and decremented
  either when a thread is woken up by another thread or when the sleep
  times out. There existed a race where the sleep count could be decremented
  twice resulting in an eventual underflow.
  Move the decrementing of the "counters" to the thread initiating the sleep
  and thus remedy the problem.
  
  Revision  Changes    Path
  1.63      +6 -7      src/sys/kern/uipc_mbuf.c
  1.67      +2 -4      src/sys/sys/mbuf.h



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