---
- branch: MAIN
  date: Tue Dec 31 17:56:16 UTC 2019
  files:
  - new: '1.92'
    old: '1.91'
    path: src/sys/uvm/uvm_page.h
    pathrev: src/sys/uvm/uvm_page.h@1.92
    type: modified
  id: 20191231T175616Z.c3564eafbbc58e7cbc0d715e42da143dcc3ff764
  log: |
    struct vm_page: cluster fields most heavily used by the page allocator and
    uvmpdpol at the start of the structure, so that while under global lock we
    need only touch one cache line for each vm_page.  There is still the problem
    of vm_page not being aligned, but this seems to drop lock wait time for
    (a modified) uvmpdpol and the allocator by 20-30% in a quick test.
  module: src
  subject: 'CVS commit: src/sys/uvm'
  unixtime: '1577814976'
  user: ad