On Wed, Feb 04, 2009 at 12:06:42PM -0800, Pallipadi, Venkatesh wrote: > On Wed, 2009-02-04 at 11:53 -0800, Henrique de Moraes Holschuh wrote: > > On Wed, 04 Feb 2009, Jens Axboe wrote: > > > On Mon, Feb 02 2009, Pallipadi, Venkatesh wrote: > > > > > > > > Bit 11 in intel PDC definitions is meant for OS capability to handle > > > > hardware coordination of P-states. In Linux we have always supported > > > > hwardware coordination of P-states. Just let the BIOSes know that we > > > > support it, by setting this bit. > > > > > > > > Some BIOSes use this bit to choose between hardware or software coordination > > > > and without this change below, BIOSes switch to software coordination, which > > > > is not very optimal in terms of power consumption and extra wakeups from idle. > > > > > > I can confirm that this fixes the excessive reschedule ipi count on an > > > x60 with the ondemand governor. Can we please get this into 2.6.29? > > > > And, after that, -stable? > > > > Agreed. This should also go to -stable once it gets into mainline. Can someone send stable@xxxxxxxxxx the git commit id when it goes into Linus's tree? thanks, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
