---
- branch: MAIN
  date: Thu Jun 25 14:04:30 UTC 2020
  files:
  - new: '1.118'
    old: '1.117'
    path: src/sys/uvm/uvm_bio.c
    pathrev: src/sys/uvm/uvm_bio.c@1.118
    type: modified
  id: 20200625T140430Z.df22d19ffae6efc83e3380dab57f6d77be7880ac
  log: |
    make ubc_winshift / ubc_winsize constant, and based on whatever is bigger
    of (1 << UBC_WINSHIFT, MAX_PAGE_SIZE)

    given that default UBC_WINSHIFT is 13, this changes behaviour only
    for mips and powerpc (BookE/OEA), which will now have twice as much
    memory used for UBC windows; if this ever becomes a problem, it's
    possible to reduce ubc_nwins in MD code similar to what is done on sparc

    this eliminates variable-length arrays in ubc_fault(),
    ubc_uiomove(), and ubc_zerorange() so that the stack usage can be
    determined and checked in compile time
  module: src
  subject: 'CVS commit: src/sys/uvm'
  unixtime: '1593093870'
  user: jdolecek