linux-kernel - Re: Tested x86 FPU fixes and found "Bad FPU state" issue

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Date:   Mon, 21 Jun 2021 11:50:33 +0000
From:   "Xu, Pengfei" <pengfei.xu@...el.com>
To:     Thomas Gleixner <tglx@...utronix.de>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Hansen, Dave" <dave.hansen@...el.com>,
        "Yu, Yu-cheng" <yu-cheng.yu@...el.com>,
        "Su, Heng" <heng.su@...el.com>, "Du, Julie" <julie.du@...el.com>,
        "Shankar, Ravi V" <ravi.v.shankar@...el.com>,
        "Brown, Len" <len.brown@...el.com>,
        "Li, Philip" <philip.li@...el.com>,
        "Xu, Pengfei" <pengfei.xu@...el.com>
Subject: Re: Tested x86 FPU fixes and found "Bad FPU state" issue

Hi Thomas,
  Thanks for your update!
  And I tried new fpu branch with last commit:
  b4c5dbb182058b2bd176fce77a4aea64494bf781
  I verified this issue was fixed.
  I will keep testing new FPU branch kernel.

  Thanks!
  BR.

On 2021-06-21 at 12:13:23 +0200, Thomas Gleixner wrote:
> Pengfei!
> 
> On Mon, Jun 21 2021 at 01:31, Pengfei Xu wrote:
> > This "Bad FPU state" issue was found in 20210619 FPU branch kernel:
> > https://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git
> > branch: origin/x86/fpu
> > last commit:
> > "
> > commit 2299e66e766a7cdca8aafc36b59ada8782d26233
> > ...
> > x86/fpu/signal: Let xrstor handle the features to init
> > "
> 
> Thanks for testing and reporting!
> 
> I found the issue and updated the branch. New head commit is
> 
>   b4c5dbb18205 ("x86/fpu/signal: Let xrstor handle the features to init")
> 
> Thanks,
> 
>         tglx