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From: Alan Cox <alc@FreeBSD.org>
Date: Fri, 22 Aug 2003 23:52:32 -0700 (PDT)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org,
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X-FreeBSD-CVS-Branch: HEAD
Subject: cvs commit: src/sys/vm vm_fault.c
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alc         2003/08/22 23:52:32 PDT

  FreeBSD src repository

  Modified files:
    sys/vm               vm_fault.c 
  Log:
  To implement the sequential access optimization, vm_fault() may need to
  reacquire the "first" object's lock while a backing object's lock is held.
  Since this is a lock-order reversal, vm_fault() uses trylock to acquire
  the first object's lock, skipping the sequential access optimization in
  the unlikely event that the trylock fails.
  
  Revision  Changes    Path
  1.175     +10 -8     src/sys/vm/vm_fault.c