FreeBSD/src d966c76 (r355764)sys/vm vm_map.c

Slightly optimize locking in vm_map_copy_swap_entry().  Anonymous objects
require the object lock to synchronize collapse.  Other swap objects such
as tmpfs do not.

Reported by:    mjg
Reviewed by:    kib, markj
Differential Revision:  https://reviews.freebsd.org/D22747
DeltaFile
+12-9sys/vm/vm_map.c
+12-91 files

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