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| author | Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> | 2011-10-09 15:42:00 -0400 |
|---|---|---|
| committer | Borislav Petkov <borislav.petkov@amd.com> | 2011-10-13 16:20:35 +0200 |
| commit | 70989449daccf545214b4840b112558e25c2b3fc (patch) | |
| tree | 60aef1f69d98cd7e1ef4ee5d1fe15ffd2cdbae9f /arch/x86/include/asm/processor.h | |
| parent | 37cf95162af4036b4198756a590aab8126fa2ce4 (diff) | |
| download | blackbird-op-linux-70989449daccf545214b4840b112558e25c2b3fc.tar.gz blackbird-op-linux-70989449daccf545214b4840b112558e25c2b3fc.zip | |
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 <srivatsa.bhat@linux.vnet.ibm.com>
Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Link: http://lkml.kernel.org/r/4E91F908.5010006@linux.vnet.ibm.com
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Diffstat (limited to 'arch/x86/include/asm/processor.h')
0 files changed, 0 insertions, 0 deletions
