Re: [PATCH]acpi c-states: Fix ACPI C3 is wrongly mapped to C2

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Sat, Dec 12, 2009 at 03:27:27PM +0100, Dominik Brodowski wrote:
> On Sat, Dec 12, 2009 at 01:14:42PM -0500, Youquan,Song wrote:
> > On Nehalem-EX, CPU C3 is mapped to ACPI C3, but C-states information in /proc
> >  and /sys are conflicting with ACPI C2 mapping and confused user.
> 
> Well, isn't the "type" only losely related to the C-state number anyway, if
> you have more than 3 states?

That's true, if CPU has more 3 states such as C3, C6, C7, there are
all mapped to ACPI C3.   But the current situation is that if platform
does NOT support ACPI C2, the user interface /sys show us ACPI C2 is
 supported which actual is ACPI C3.

As you know, ACPI C3 and ACPI C2 have much different, such as: BUS SNOOP
 or not, ACPI C3 has better power saving etc. we should not mix them.

Thanks.

-Youquan

--
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

[Index of Archives]     [Linux IBM ACPI]     [Linux Power Management]     [Linux Kernel]     [Linux Laptop]     [Kernel Newbies]     [Share Photos]     [Security]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Samba]     [Video 4 Linux]     [Device Mapper]     [Linux Resources]

  Powered by Linux