The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/i386/conf/XENHVM

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    1 #
    2 # XENHVM -- Xen HVM kernel configuration file for FreeBSD/i386
    3 #
    4 # $FreeBSD: stable/9/sys/i386/conf/XENHVM 239412 2012-08-20 11:34:49Z cperciva $
    5 #
    6 include         GENERIC
    7 ident           XENHVM
    8 
    9 #
   10 # Adaptive locks rely on a lock-free pointer read to determine the run state
   11 # of the thread holding a lock when under contention; under a virtualisation
   12 # system, the thread run state may not accurately reflect whether the thread
   13 # (or rather its host VCPU) is actually executing.  As such, disable this
   14 # optimisation.
   15 #
   16 options         NO_ADAPTIVE_MUTEXES
   17 options         NO_ADAPTIVE_RWLOCKS
   18 options         NO_ADAPTIVE_SX
   19 
   20 # Xen HVM support
   21 options         XENHVM
   22 device          xenpci

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