> On Wed, 23 Mar 2011, Greg KH wrote: > > > On Tue, Mar 22, 2011 at 10:24:43PM -0400, Len Brown wrote: > > > From: Len Brown <len.brown@xxxxxxxxx> > > > > > > upstream 14796fca2bd22acc73dd0887248d003b0f441d08 > > > > > > 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> > > > > This patch doesn't apply to the .38-stable tree, and it also needs to go > > there, right? Can you please send a version that I can apply? > > it is already present in 2.6.38, as is the next one. > That is why the subject specified 2.6.37.stable. Why is it stable material? Seems like small power optimalization to me... -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
