Messages in this thread | | | From | "Rafael J. Wysocki" <> | Subject | Re: [PATCH RESEND] CPU hotplug,x86 Microcode: Don't request microcode from userspace unnecessarily | Date | Mon, 10 Oct 2011 23:18:26 +0200 |
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On Monday, October 10, 2011, Borislav Petkov wrote: > On Mon, Oct 10, 2011 at 04:58:02PM -0400, Rafael J. Wysocki wrote: > > On Sunday, October 09, 2011, Srivatsa S. Bhat wrote: > > > Requesting the microcode from userspace *every time* when onlining CPUs > > > (during a CPU hotplug operation) is unnecessary. > > > > > > So, this patch ensures 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. > > > > > > Tested-by: Borislav Petkov <bp@amd64.org> > > > Acked-by: Borislav Petkov <bp@amd64.org> > > > > > > Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> > > > > Fine by me. I wonder who should take this? > > Ingo, most probably. ucode stuff goes in through -tip.
OK, so
Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Thanks, Rafael
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