cvs commit: src/sys/dev/acpica acpi_cpu.c

[Nate Lawson]

njl         2007-06-03 00:40:56 UTC

  FreeBSD src repository

  Modified files:
    sys/dev/acpica       acpi_cpu.c 
  Log:
  Disable CPU idle states during suspend and reenable them during resume.
  While in the suspend path, this means the idle thread will just return
  immediately rather than trying to enter C1-n.  This helps in the case where
  the chipset is powered down before the rest of the system and reads from
  the cpu sleep registers begin returning immediately, causing the logic that
  catches bad C2/C3 behavior to kick in.  Observed on my Panasonic Y4.
  
  MFC after:      3 days
  
  Revision  Changes    Path
  1.66      +29 -2     src/sys/dev/acpica/acpi_cpu.c