diff options
| author | Suresh Siddha <suresh.b.siddha@intel.com> | 2010-11-23 16:11:40 -0800 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2010-12-13 16:23:56 -0800 |
| commit | 3fb82d56ad003e804923185316236f26b30dfdd5 (patch) | |
| tree | 3ee08bef7cdc0f0ed3b69be5609b53c44299a229 /Documentation/preempt-locking.txt | |
| parent | cf7d7e5a1980d1116ee152d25dac382b112b9c17 (diff) | |
x86, suspend: Avoid unnecessary smp alternatives switch during suspend/resume
During suspend, we disable all the non boot cpus. And during resume we bring
them all back again. So no need to do alternatives_smp_switch() in between.
On my core 2 based laptop, this speeds up the suspend path by 15msec and the
resume path by 5 msec (suspend/resume speed up differences can be attributed
to the different P-states that the cpu is in during suspend/resume).
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
LKML-Reference: <1290557500.4946.8.camel@sbsiddha-MOBL3.sc.intel.com>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'Documentation/preempt-locking.txt')
0 files changed, 0 insertions, 0 deletions