Messages in this thread | | | Date | Tue, 23 Mar 2010 15:19:34 +0100 | From | Borislav Petkov <> | Subject | Re: [PATCH 2/5] powernow-k8: Add core performance boost support |
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From: Dominik Brodowski <linux@dominikbrodowski.net> Date: Tue, Mar 23, 2010 at 02:27:37PM +0100
Hi Dominik,
> On Tue, Mar 23, 2010 at 12:58:58PM +0100, Borislav Petkov wrote: > > > It could already be set in arch/x86/kernel/cpu/amd.c and > > > powernow-k8 could use cpu_has(cpu, X86_FEATURE_CPB); > > > > I'd still like to cache the cpb_capable value locally instead of getting > > x86_cpuinfo percpu var and querying it. Especially if this happens often > > and not only at driver init. > > If it's a percpu var, isn't it local anyway?
I meant driver-local. So that I don't have to deref even the per_cpu var and thus save some cycles.
-- Regards/Gruss, Boris.
-- Advanced Micro Devices, Inc. Operating Systems Research Center
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