[lkml]   [2018]   [Oct]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH 07/11] x86/pkeys: Drop the preempt-disable section
On Fri, Oct 12, 2018 at 10:58 AM Dave Hansen
<> wrote:
> On 10/04/2018 07:05 AM, Sebastian Andrzej Siewior wrote:
> > The fpu->initialized flag should not be changed underneath us. This might be a
> > fallout during the removal of the LazyFPU support. The FPU is marked
> > initialized as soon as the state has been set to an initial value. It does not
> > signal if the CPU's FPU registers are loaded.
> If this is true, then the check for fpu->initialized should also go away.

All these "if" statements in the FPU code are messy and make
understanding and reviewing this code hard.

Can you prepare a patch for the beginning of your series that removes
fpu->initialized and just ensures that the fpu is always initialized?
This will regress performance, but you should get all that performance
back with TIF_LOAD_FPU.

 \ /
  Last update: 2018-10-12 20:08    [W:0.115 / U:2.112 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site