Hi Linus,
please pull from:
git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6.git idle-release
This will update the files shown below.
thanks!
Len Brown
Intel Open Source Technology Center
arch/x86/include/asm/msr-index.h | 5 +++++
drivers/idle/intel_idle.c | 24 ++++++++++++++++++++++++
2 files changed, 29 insertions(+), 0 deletions(-)
through these commits:
Len Brown (2):
intel_idle: disable NHM/WSM HW C-state auto-demotion
intel_idle: disable Atom/Lincroft HW C-state auto-demotion
with this log:
commit bfb53ccf1c734b1907df7189eef4c08489827951
Author: Len Brown <len.brown@xxxxxxxxx>
Date: Wed Feb 16 01:32:48 2011 -0500
intel_idle: disable Atom/Lincroft HW C-state auto-demotion
Just as we had to disable auto-demotion for NHM/WSM,
we need to do the same for Atom (Lincroft version).
In particular, auto-demotion will prevent Lincroft
from entering the S0i3 idle power saving state.
https://bugzilla.kernel.org/show_bug.cgi?id=25252
Signed-off-by: Len Brown <len.brown@xxxxxxxxx>
commit 14796fca2bd22acc73dd0887248d003b0f441d08
Author: Len Brown <len.brown@xxxxxxxxx>
Date: Tue Jan 18 20:48:27 2011 -0500
intel_idle: disable NHM/WSM HW C-state auto-demotion
Hardware C-state auto-demotion is a mechanism where the HW overrides
the OS C-state request, instead demoting to a shallower state,
which is less expensive, but saves less power.
Modern Linux should generally get exactly the states it requests.
In particular, when a CPU is taken off-line, it must not be demoted, else
it can prevent the entire package from reaching deep C-states.
https://bugzilla.kernel.org/show_bug.cgi?id=25252
Signed-off-by: Len Brown <len.brown@xxxxxxxxx>
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