lkml.org 
[lkml]   [2013]   [Dec]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: 50 Watt idle power regression bisected to Linux-3.10

* Thomas Gleixner <tglx@linutronix.de> wrote:

> On Wed, 11 Dec 2013, Ingo Molnar wrote:
> >
> > Another thing that is required I think is to issue a write barrier
> > before CLFLUSH instruction. By my (possibly incorrect ...) reading of
> > the documentation CLFLUSH does not appear to be ordered (at all), so
> > it might execute before the modification to the affected memory?
>
> We already have a write barrier in the code which modifies
> current_thread_info()->flags.

Which code is that, could you please cite it? (I tried finding it but
my grep-fu failed me.)

Thanks,

Ingo


\
 
 \ /
  Last update: 2013-12-11 16:41    [W:0.229 / U:0.080 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site