From: Suresh Siddha <suresh.b.siddha@intel.com>
Date: Fri, 1 Oct 2010 01:19:07 +0000 (-0400)
Subject: intel_idle: Voluntary leave_mm before entering deeper
X-Git-Tag: v2.6.36-rc7~26^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6110a1f43c27b516e16d5ce8860fca50748c2a87;p=pandora-kernel.git

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>
---

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