Messages in this thread | | | Date | Wed, 9 Mar 2016 13:46:26 +0100 | From | Ingo Molnar <> | Subject | Re: [PATCH] x86/fpu: Revert earlier patch of Disable AVX when eagerfpu is off |
| |
* Yu-cheng Yu <yu-cheng.yu@intel.com> wrote:
> AVX was mistakenly believed to be dependent on eagerfpu switch. > This turns out to be false. The earlier patch should be reverted. > > Original patch: > http://git.kernel.org/tip/394db20ca240741a08d472173db13d6f6a6e5a28
So the original patch had a whole host of explanations of why that change is correct. This revert should explain where that argumentation was wrong.
Also note that eagerfpu=off is on the way out, on v4.6 we'll switch all CPUs to eagerfpu:
58122bf1d856 x86/fpu: Default eagerfpu=on on all CPUs
and in the not so distant future, if everything goes fine with the eager mode, I'd like to drop the lazy FPU context switching code altogether - which will simplify a lot of code. At that point the 'eagerfpu' boot option will go away as well.
Thanks,
Ingo
| |