From: Ingo Molnar <mingo@kernel.org>
To: Yu-cheng Yu <yu-cheng.yu@intel.com>
Cc: linux-kernel@vger.kernel.org, x86@kernel.org,
"H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@suse.de>,
Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>,
"Ravi V. Shankar" <ravi.v.shankar@intel.com>,
Leonid Shatz <leonid.shatz@ravellosystems.com>,
Fenghua Yu <fenghua.yu@intel.com>,
Andy Lutomirski <luto@kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
Peter Zijlstra <a.p.zijlstra@chello.nl>
Subject: Re: [PATCH] x86/fpu: Revert earlier patch of Disable AVX when eagerfpu is off
Date: Wed, 9 Mar 2016 19:42:24 +0100 [thread overview]
Message-ID: <20160309184224.GC17956@gmail.com> (raw)
In-Reply-To: <20160309171938.GA15503@test-lenovo>
* Yu-cheng Yu <yu-cheng.yu@intel.com> wrote:
> On Wed, Mar 09, 2016 at 01:46:26PM +0100, Ingo Molnar wrote:
> >
> > * 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.
>
> I will send out another version that includes more details.
Great, thanks!
Ingo
next prev parent reply other threads:[~2016-03-09 18:42 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-23 1:10 [PATCH] x86/fpu: Revert earlier patch of Disable AVX when eagerfpu is off Yu-cheng Yu
2016-03-09 12:46 ` Ingo Molnar
2016-03-09 17:19 ` Yu-cheng Yu
2016-03-09 18:42 ` Ingo Molnar [this message]
2016-03-09 18:51 ` H. Peter Anvin
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