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From: Alan Cox <alc@FreeBSD.org>
Date: Tue, 19 Aug 2003 11:20:34 -0700 (PDT)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org,
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Subject: cvs commit: src/sys/i386/i386 pmap.c
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alc         2003/08/19 11:20:34 PDT

  FreeBSD src repository

  Modified files:
    sys/i386/i386        pmap.c 
  Log:
  Eliminate a possible race condition for multithreaded applications in
  _pmap_allocpte(): Guarantee that the page table page is zero filled before
  adding it to the directory.  Otherwise, a 2nd, 3rd, etc. thread could
  access a nearby virtual address and use garbage for the address
  translation.
  
  Discussed with: peter, tegge
  
  Revision  Changes    Path
  1.428     +2 -13     src/sys/i386/i386/pmap.c