From: Len Brown <len.brown@intel.com>
Date: Fri, 9 Nov 2012 03:38:05 +0000 (-0500)
Subject: tools/power turbostat: prevent infinite loop on migration error path
X-Git-Tag: v3.8-rc1~59^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e52966c084f9d9ea12be2ac7df801d610d4a19a5;p=pandora-kernel.git

tools/power turbostat: prevent infinite loop on migration error path

Turbostat assumed if it can't migrate to a CPU, then the CPU
must have gone off-line and turbostat should re-initialize
with the new topology.

But if turbostat can not migrate because it is restricted by
a cpuset, then it will fail to migrate even after re-initialization,
resulting in an infinite loop.

Spit out a warning when we can't migrate
and endure only 2 re-initialize cycles in a row
before giving up and exiting.

Signed-off-by: Len Brown <len.brown@intel.com>
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