CVS commit: src/sys/uvm

["Andrew Doran" <ad%netbsd.org@localhost>]

Module Name:    src
Committed By:   ad
Date:           Sat Mar 14 14:15:43 UTC 2020

Modified Files:
        src/sys/uvm: uvm_map.c uvm_map.h

Log Message:
- uvmspace_exec(), uvmspace_free(): if pmap_remove_all() returns true the
  pmap is emptied.  Pass UVM_FLAG_VAONLY when clearing out the map and avoid
  needless extra work to tear down each mapping individually.

- uvm_map_lookup_entry(): remove the code to do a linear scan of map entries
  for small maps, in preference to using the RB tree.  It's questionable,
  and I think the code is almost never triggered because the average number
  of map entries has probably exceeded the hard-coded threshold for quite
  some time.

- vm_map_entry: get it aligned on a cacheline boundary, and cluster fields
  used during rbtree lookup at the beginning.


To generate a diff of this commit:
cvs rdiff -u -r1.372 -r1.373 src/sys/uvm/uvm_map.c
cvs rdiff -u -r1.78 -r1.79 src/sys/uvm/uvm_map.h

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.