---
- branch: MAIN
  date: Mon Apr 20 16:12:28 UTC 2020
  files:
  - new: '1.83'
    old: '1.82'
    path: src/sys/arch/xen/xen/xbdback_xenbus.c
    pathrev: src/sys/arch/xen/xen/xbdback_xenbus.c@1.83
    type: modified
  id: 20200420T161228Z.8ed37c5751b40e7e5eac213a956ca28d465f1abd
  log: |
    remove I/O defragmentation logic, pass requests straight to the
    underlying block device without trying to coalesce them

    it seems rarely useful, and it makes the handling logic unnecessarily complex -
    ultimately it's the DomU operating system responsibility to issue optimal I/O

    might also help with the ZFS problem reported on port-xen, and will surely
    simplify eventual indirect segment support
  module: src
  subject: 'CVS commit: src/sys/arch/xen/xen'
  unixtime: '1587399148'
  user: jdolecek