On Mon, 23 Jun 2008, Zhao Yakui wrote: > On Fri, 2008-06-20 at 03:14 -0400, Len Brown wrote: > > > > I notice on the T61 that this disables MWAIT for C2 and C3, > > but not for C1. > > > > While I know that the issue at hand is C2 and C3, > > it seems misleading to boot with idle=nomwait > > and see that MWAIT is used for C1. > What you said is correct. The description is not appropriate.Maybe the > following title will be appropriate. > >Add boot option of "idle=nomwait" to disable mwait for CPU C2/C3 > > The boot option of "idle=nomwait" will disable mwait for CPU C2/C3 and > still use mwait for C1 if mwait is supported. > In fact we only hope to disable mwait for CPU C2/C3 on some broken > system by adding this boot option. How can I tell the system with 3 C-states to use all 3, but not to use MWAIT for any of them? idle=halt will not do, since it will delete C2 and C3 completely. As I said, I think that "idle=nomwait" should do this. If we have a parameter that disables MWAIT only for C2 and C3, then it should not be called "idle=nomwait". -Len -- 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
