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Groups > linux.kernel > #1501833
| From | "Luc, Piotr" <Piotr.Luc@intel.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [tip:x86/urgent] x86/cpufeature: Add AVX512_4VNNIW and AVX512_4FMAPS features |
| Date | 2016-10-17 12:00 +0200 |
| Message-ID | <stcS6-1MH-39@gated-at.bofh.it> (permalink) |
| References | (2 earlier) <ssUs9-6Vd-1@gated-at.bofh.it> <ssWaB-83K-5@gated-at.bofh.it> <ssWDD-8eT-7@gated-at.bofh.it> <ssYFs-14v-9@gated-at.bofh.it> <st2g3-3pp-61@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Mon, 2016-10-17 at 00:42 +0200, Borislav Petkov wrote: > On Sun, Oct 16, 2016 at 11:42:26AM -0700, hpa@zytor.com wrote: > > > > It's needlessly adding complexity for no reason, at least for the > > What complexity? The init_scattered_cpuid_features() version is a > trivial patch in comparison to the current version. > > > > > leaves that are going to add bits over time. > > Sure, except they don't get added or we don't need them or whatever, > and > we end up with only a small number of bits actually being used. > > I don't mind moving them to x86_capability later, when a high > percentage > of the respective leaf is actually being used but not for a couple of > bits. That's just waste. > > > > > The x86_capability array is not an expensive resource. > > 0.1% here, 0.1% there, the creeping bloat thing. > > And again, the init_scattered_cpuid_features() hunk is much smaller. > I agree, the scattered solution reduces data segment footprint in case many cores. Regards, Piotr
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[tip:x86/urgent] x86/cpufeature: Add AVX512_4VNNIW and AVX512_4FMAPS features tip-bot for Piotr Luc <tipbot@zytor.com> - 2016-10-16 13:30 +0200
Re: [tip:x86/urgent] x86/cpufeature: Add AVX512_4VNNIW and AVX512_4FMAPS features Borislav Petkov <bp@alien8.de> - 2016-10-16 16:20 +0200
Re: [tip:x86/urgent] x86/cpufeature: Add AVX512_4VNNIW and AVX512_4FMAPS features hpa@zytor.com - 2016-10-16 18:10 +0200
Re: [tip:x86/urgent] x86/cpufeature: Add AVX512_4VNNIW and AVX512_4FMAPS features Borislav Petkov <bp@alien8.de> - 2016-10-16 18:40 +0200
Re: [tip:x86/urgent] x86/cpufeature: Add AVX512_4VNNIW and AVX512_4FMAPS features hpa@zytor.com - 2016-10-16 20:50 +0200
Re: [tip:x86/urgent] x86/cpufeature: Add AVX512_4VNNIW and AVX512_4FMAPS features Borislav Petkov <bp@alien8.de> - 2016-10-17 00:40 +0200
Re: [tip:x86/urgent] x86/cpufeature: Add AVX512_4VNNIW and AVX512_4FMAPS features "Luc, Piotr" <Piotr.Luc@intel.com> - 2016-10-17 12:00 +0200
Re: [tip:x86/urgent] x86/cpufeature: Add AVX512_4VNNIW and AVX512_4FMAPS features Thomas Gleixner <tglx@linutronix.de> - 2016-10-17 10:00 +0200
Re: [tip:x86/urgent] x86/cpufeature: Add AVX512_4VNNIW and AVX512_4FMAPS features "Luc, Piotr" <Piotr.Luc@intel.com> - 2016-10-17 10:30 +0200
Re: [tip:x86/urgent] x86/cpufeature: Add AVX512_4VNNIW and AVX512_4FMAPS features Ingo Molnar <mingo@kernel.org> - 2016-10-17 10:50 +0200
Re: [tip:x86/urgent] x86/cpufeature: Add AVX512_4VNNIW and AVX512_4FMAPS features "Luc, Piotr" <Piotr.Luc@intel.com> - 2016-10-17 12:00 +0200
Re: [tip:x86/urgent] x86/cpufeature: Add AVX512_4VNNIW and AVX512_4FMAPS features Thomas Gleixner <tglx@linutronix.de> - 2016-10-17 12:00 +0200
[PATCH v2] x86/cpufeature: Add AVX512_4VNNIW and AVX512_4FMAPS features. Piotr Luc <piotr.luc@intel.com> - 2016-10-17 17:10 +0200
Re: [v2] x86/cpufeature: Add AVX512_4VNNIW and AVX512_4FMAPS features. "Luc, Piotr" <Piotr.Luc@intel.com> - 2016-10-18 15:10 +0200
Re: [v2] x86/cpufeature: Add AVX512_4VNNIW and AVX512_4FMAPS features. Ingo Molnar <mingo@kernel.org> - 2016-10-18 15:10 +0200
[PATCH v3] x86/cpufeature: Add AVX512_4VNNIW and AVX512_4FMAPS features. Piotr Luc <piotr.luc@intel.com> - 2016-10-18 17:10 +0200
[tip:x86/urgent] x86/cpufeature: Add AVX512_4VNNIW and AVX512_4FMAPS features tip-bot for Piotr Luc <tipbot@zytor.com> - 2016-10-19 17:50 +0200
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