Messages in this thread | | | Date | Tue, 12 Jun 2012 19:23:52 +0200 | From | Borislav Petkov <> | Subject | Re: [PATCH] perf/x86: check ucode before disabling PEBS on SandyBridge |
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On Tue, Jun 12, 2012 at 07:18:13PM +0200, Peter Zijlstra wrote: > But the ucode loader can be (ab)used to only update one of the many > CPUs.
Not if you don't support mixed ucode revisions. In that case, you want the same ucode patch applied to _all_ cores on the system. Otherwise, random freezes, explosions and other cataclysmic events can happen.
-- Regards/Gruss, Boris.
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