diff options
| author | Venkatesh Pallipadi <venki@google.com> | 2012-02-03 22:22:25 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-02-13 11:16:55 -0800 |
| commit | f51d67a64f32cd81ea8b67ca964fb7cf7e783b2e (patch) | |
| tree | 0173e8faa62cc07b02df55935355d2157fd03bea /include/linux/stackprotector.h | |
| parent | d483054fe4c66eeb7a03fdc97519b07edb1dc803 (diff) | |
PM / QoS: CPU C-state breakage with PM Qos change
commit d020283dc694c9ec31b410f522252f7a8397e67d upstream.
Looks like change "PM QoS: Move and rename the implementation files"
merged during the 3.2 development cycle made PM QoS depend on
CONFIG_PM which depends on (PM_SLEEP || PM_RUNTIME).
That breaks CPU C-states with kernels not having these CONFIGs, causing CPUs
to spend time in Polling loop idle instead of going into deep C-states,
consuming way way more power. This is with either acpi idle or intel idle
enabled.
Either CONFIG_PM should be enabled with any pm_qos users or
the !CONFIG_PM pm_qos_request() should return sane defaults not to break
the existing users. Here's is the patch for the latter option.
[rjw: Modified the changelog slightly.]
Signed-off-by: Venkatesh Pallipadi <venki@google.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/stackprotector.h')
0 files changed, 0 insertions, 0 deletions