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From: Nathan Whitehorn <nwhitehorn@FreeBSD.org>
Date: Sat, 20 Mar 2010 14:35:24 +0000 (UTC)
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Subject: cvs commit: src/sys/powerpc/aim mmu_oea64.c
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nwhitehorn    2010-03-20 14:35:24 UTC

  FreeBSD src repository

  Modified files:
    sys/powerpc/aim      mmu_oea64.c 
  Log:
  SVN rev 205370 on 2010-03-20 14:35:24Z by nwhitehorn
  
  Revisit locking in the 64-bit AIM PMAP. The PVO head for a page is
  generally protected by the VM page queue mutex. Instead of extending the
  table lock to cover the PVO heads, add some asserts that the page queue
  mutex is in fact held. This fixes several LORs and possible deadlocks.
  
  This also adds an optimization to moea64_kextract() useful for
  direct-mapped quantities, like UMA buffers. Being able to use this from
  inside UMA removes an additional LOR.
  
  Revision  Changes    Path
  1.21      +20 -16    src/sys/powerpc/aim/mmu_oea64.c