alc
b52bde70e4
Replace all uses of the vm page queues lock by a r/w lock that is private ...
to this pmap.c. This new r/w lock is used primarily to synchronize access
to the PV lists. However, it will be used in a somewhat unconventional
way. As finer-grained PV list locking is added to each of the pmap
functions that acquire this r/w lock, its acquisition will be changed from
write to read, enabling concurrent execution of the pmap functions with
finer-grained locking.
Reviewed by: kib
X-MFC after: r235598
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b52bde70e4