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From: Bosko Milekic <bmilekic@FreeBSD.org>
Date: Tue, 12 Dec 2000 21:13:03 -0800 (PST)
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: cvs commit: src/sys/sys mbuf.h
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bmilekic    2000/12/12 21:13:03 PST

  Modified files:
    sys/sys              mbuf.h 
  Log:
  Eliminate a race in MEXTFREE(). The reference counter decrement and test
  was not atomic. We now make sure that we free the ext buf if the reference
  count is about to reach 0 but also make sure that nobody else has done it
  before us.
  
  While I'm here, change refcnt to u_int (from long). This fixes a compiler
  warning regarding use of atomic_cmpset_long on i386.
  
  Submitted by: jasone
  Reviewed by: jlemon, jake
  
  Revision  Changes    Path
  1.65      +17 -12    src/sys/sys/mbuf.h



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