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| author | Srivatsa S. Bhat <[email protected]> | 2011-10-09 15:42:00 -0400 |
|---|---|---|
| committer | Borislav Petkov <[email protected]> | 2011-10-13 16:20:35 +0200 |
| commit | 70989449daccf545214b4840b112558e25c2b3fc (patch) | |
| tree | 60aef1f69d98cd7e1ef4ee5d1fe15ffd2cdbae9f /tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/Util.py | |
| parent | 37cf95162af4036b4198756a590aab8126fa2ce4 (diff) | |
x86, microcode: Don't request microcode from userspace unnecessarily
Requesting the microcode from userspace *every time* when onlining CPUs
(during a CPU hotplug operation) is unnecessary. Thus, ensure that
once the kernel gets the microcode after booting, it is not freed nor
invalidated when a CPU goes offline, so that it can be reused when that
CPU comes back online, without requesting userspace for it again. As a
result, the CPU hotplug operations become faster as well.
Signed-off-by: Srivatsa S. Bhat <[email protected]>
Acked-by: Rafael J. Wysocki <[email protected]>
Acked-by: Andreas Herrmann <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Borislav Petkov <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/Util.py')
0 files changed, 0 insertions, 0 deletions