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| author | Suresh Siddha <suresh.b.siddha@intel.com> | 2010-09-30 21:19:07 -0400 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2010-09-30 21:19:22 -0400 |
| commit | 6110a1f43c27b516e16d5ce8860fca50748c2a87 (patch) | |
| tree | 021233718337a4a72ba4715f4d0782d5253fec7c /include/linux | |
| parent | 9587a678fa56ea6d7f39b048f24f5d03a89bf9b3 (diff) | |
| download | linux-stable-6110a1f43c27b516e16d5ce8860fca50748c2a87.tar.gz linux-stable-6110a1f43c27b516e16d5ce8860fca50748c2a87.tar.bz2 linux-stable-6110a1f43c27b516e16d5ce8860fca50748c2a87.zip | |
intel_idle: Voluntary leave_mm before entering deeper
Avoid TLB flush IPIs for the cores in deeper c-states by voluntary leave_mm()
before entering into that state. CPUs tend to flush TLB in those c-states
anyways.
acpi_idle does this with C3-type states, but it was not caried over
when intel_idle was introduced. intel_idle can apply it
to C-states in addition to those that ACPI might export as C3...
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/cpuidle.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h index 36ca9721a0c2..1be416bbbb82 100644 --- a/include/linux/cpuidle.h +++ b/include/linux/cpuidle.h @@ -53,6 +53,7 @@ struct cpuidle_state { #define CPUIDLE_FLAG_BALANCED (0x40) /* medium latency, moderate savings */ #define CPUIDLE_FLAG_DEEP (0x80) /* high latency, large savings */ #define CPUIDLE_FLAG_IGNORE (0x100) /* ignore during this idle period */ +#define CPUIDLE_FLAG_TLB_FLUSHED (0x200) /* tlb will be flushed */ #define CPUIDLE_DRIVER_FLAGS_MASK (0xFFFF0000) |