Re: [PATCH 4/5] x86/fpu: Speed up lazy FPU restores slightly

From	Borislav Petkov <bp@alien8.de>
Newsgroups	linux.kernel
Subject	Re: [PATCH 4/5] x86/fpu: Speed up lazy FPU restores slightly
Date	2016-01-24 00:40 +0100
Message-ID	<qUfWF-4Ag-7@gated-at.bofh.it> (permalink)
References	<qTUIx-3qs-3@gated-at.bofh.it> <qTUIy-3qs-13@gated-at.bofh.it> <qU3su-1c2-7@gated-at.bofh.it> <qUeHf-3x3-1@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Show all headers | View raw

On Sat, Jan 23, 2016 at 02:09:59PM -0800, Andy Lutomirski wrote:
> Maybe this will be just cpu_has some day if my theory about the new
> improved static_cpu_has being shorter than boot_cpu_has pans out :)

Yeah, I have the static_cpu_has() simplification patchset v2 ready, will
send out tomorrow.

And yeah, as a next step, we probably should think about hiding
boot_cpu_has() and using solely static_cpu_has() everywhere instead.

The cpu_has() thing takes struct cpuinfo_x86 * and I'll bet a bunch of
money that a lot of the callsites could do static_cpu_has(), i.e., look
at boot CPU bits instead. That's for later, though.

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.

Thread

[PATCH 0/5] x86/fpu: eagerfpu fixes, speedups, and default enablement Andy Lutomirski <luto@kernel.org> - 2016-01-23 02:00 +0100
  [PATCH 2/5] x86/fpu: Fix FNSAVE usage in eagerfpu mode Andy Lutomirski <luto@kernel.org> - 2016-01-23 02:00 +0100
  [PATCH 4/5] x86/fpu: Speed up lazy FPU restores slightly Andy Lutomirski <luto@kernel.org> - 2016-01-23 02:00 +0100
    Re: [PATCH 4/5] x86/fpu: Speed up lazy FPU restores slightly Borislav Petkov <bp@alien8.de> - 2016-01-23 11:20 +0100
      Re: [PATCH 4/5] x86/fpu: Speed up lazy FPU restores slightly Andy Lutomirski <luto@amacapital.net> - 2016-01-23 23:20 +0100
        Re: [PATCH 4/5] x86/fpu: Speed up lazy FPU restores slightly Borislav Petkov <bp@alien8.de> - 2016-01-24 00:40 +0100
  [PATCH 5/5] x86/fpu: Default eagerfpu=on on all CPUs Andy Lutomirski <luto@kernel.org> - 2016-01-23 02:00 +0100
    Re: [PATCH 5/5] x86/fpu: Default eagerfpu=on on all CPUs Borislav Petkov <bp@alien8.de> - 2016-01-23 11:30 +0100
  [PATCH 1/5] x86/fpu: Fix math emulation in eager fpu mode Andy Lutomirski <luto@kernel.org> - 2016-01-23 02:00 +0100
    Re: [PATCH 1/5] x86/fpu: Fix math emulation in eager fpu mode Borislav Petkov <bp@alien8.de> - 2016-01-23 11:10 +0100
      Re: [PATCH 1/5] x86/fpu: Fix math emulation in eager fpu mode Andy Lutomirski <luto@amacapital.net> - 2016-01-23 18:50 +0100
        Re: [PATCH 1/5] x86/fpu: Fix math emulation in eager fpu mode Borislav Petkov <bp@alien8.de> - 2016-01-23 19:00 +0100

csiph-web