git: kernel - Fix vm_object token deadlock

commit bdea739c3640a6c0dad2c22379358730d1c512c9
Author: Matthew Dillon <[e-mail]>
Date:   Sun Nov 20 09:47:47 2011 -0800

    kernel - Fix vm_object token deadlock
    
    * vm_page_alloc() needs an exclusive vm_object token when recycling
      random cache pages into the free queue.  Because these are effectively
      random pages it is possible for this exclusive token to interfere
      with a shared token already held by the thread.
    
    * Make sure we can actually get the token.  If we cannot we deactivate
      the page instead.

Summary of changes:
 sys/vm/vm_page.c |   20 ++++++++++++++++++--
 1 files changed, 18 insertions(+), 2 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/bdea739c3640a6c0dad2c22379358730d1c512c9


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