---
- branch: MAIN
  date: Thu Feb 26 18:18:14 UTC 2009
  files:
  - new: '1.143'
    old: '1.142'
    path: src/sys/uvm/uvm_page.c
    pathrev: src/sys/uvm/uvm_page.c@1.143
    type: modified
  id: 20090226T181814Z.57c9fd0c2e9442eb368c1314bbec023ee9b97f97
  log: |
    -fix two conditions where PQ_FREE was still/already set while the page
     was not anymore/yet on the freelist and uvm_fpageqlock was not held
    -clear PQ_FREE while the page is in the works of pageidlezero
    This avoids that the DMA memory allocator (pglistalloc) grabs a page
    which is not on the freelist, leading to a diagnostic panic (with DEBUG)
    or freelist corruption. (mostly on X server activation after a VT
    switch or suspend/resume because this can allocate megabytes of AGP
    memory)
    This might fix PR port-i386/38989 by Alan Barrett (in case this was
    a multiprocessor).
  module: src
  subject: 'CVS commit: src/sys/uvm'
  unixtime: '1235672294'
  user: drochner