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Groups > linux.kernel > #1314527
| From | Andy Lutomirski <luto@amacapital.net> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: Linux patch disabling AVX when eagerfpu is turned off - possibly not required |
| Date | 2016-01-21 22:10 +0100 |
| Message-ID | <qTuEq-2ry-11@gated-at.bofh.it> (permalink) |
| References | <qTkOJ-3XA-11@gated-at.bofh.it> <qTtIm-1Np-17@gated-at.bofh.it> <qTtS2-1R8-17@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Jan 21, 2016 12:12 PM, "H. Peter Anvin" <hpa@zytor.com> wrote: > > On 01/21/16 12:08, Dave Hansen wrote: > > On 01/21/2016 02:33 AM, Leonid Shatz wrote: > >> In view of above findings we would like to suggest to double check if > >> disabling AVX together with "eagerfpu off" is actually required and is a > >> real necessity. It would be helpful to consult with Intel engineers > >> regarding related design details. > > > > Hi Leonid, > > > > Thanks for the report! > > > > Are you aware of any actual eagerfpu=off use in practice, or is this > > mostly a theoretical concern? > > > > Looking into this, FWIW. I still think that we should default eagerfpu=on on all CPUs for one release and then, when nothing breaks, delete all the old lazy code. I'll respin and send that patch. --Andy
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Linux patch disabling AVX when eagerfpu is turned off - possibly not required "Leonid Shatz" <leonid.shatz@ravellosystems.com> - 2016-01-21 11:40 +0100
Re: Linux patch disabling AVX when eagerfpu is turned off - possibly not required Dave Hansen <dave.hansen@intel.com> - 2016-01-21 21:10 +0100
Re: Linux patch disabling AVX when eagerfpu is turned off - possibly not required "H. Peter Anvin" <hpa@zytor.com> - 2016-01-21 21:20 +0100
Re: Linux patch disabling AVX when eagerfpu is turned off - possibly not required Andy Lutomirski <luto@amacapital.net> - 2016-01-21 22:10 +0100
Re: Linux patch disabling AVX when eagerfpu is turned off - possibly not required Yu-cheng Yu <yu-cheng.yu@intel.com> - 2016-01-21 22:10 +0100
Re: Linux patch disabling AVX when eagerfpu is turned off - possibly not required "H. Peter Anvin" <hpa@zytor.com> - 2016-01-21 22:10 +0100
Re: Linux patch disabling AVX when eagerfpu is turned off - possibly not required Yu-cheng Yu <yu-cheng.yu@intel.com> - 2016-01-21 22:20 +0100
RE: Linux patch disabling AVX when eagerfpu is turned off - possibly not required "Leonid Shatz" <leonid.shatz@ravellosystems.com> - 2016-01-21 22:20 +0100
Re: Linux patch disabling AVX when eagerfpu is turned off - possibly not required "H. Peter Anvin" <hpa@zytor.com> - 2016-01-21 22:30 +0100
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