lkml.org 
[lkml]   [2009]   [Mar]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: x86-microcode: get rid of set_cpus_allowed()
On Thu, Mar 12, 2009 at 06:40:10PM +0100, Andreas Herrmann wrote:
> On Wed, Mar 11, 2009 at 07:44:37AM +0100, Rusty Russell wrote:
> > On Tuesday 10 March 2009 06:08:59 Dmitry Adamushko wrote:
> > >
> > > Hi,
> > >
> > >
> > > here is a possible candidate for Rusty's cpumask-refactored series.
> > > Note the [*] remark below though.
> >
> > Ah, OK, I'll drop my version then (below) in favor of this, and will
> > push to Ingo with the others if he doesn't take it directly.
>
> Sorry guys -- for the late reply --
> but I missed Dmitry's mail due to some silly mail filtering and had to
> restore his mail ...
>
> Now I've tested both patches and both seem to reliably prevent
> microcode updates on CPU1 and CPU2 of an Phenom X3 after
> suspend/resume. (Just CPU0 was updated.)
>
> Then I've tested mainline kernel w/o your patches and I've observed
> similar problems. I've seen that sometimes ucode of CPU0 was not
> updated and sometimes CPU1 and CPU2 were not updated.
>
> I'll look into this asap.

Some further testing seem to indicate that suspend/resume does not
work when I have done CPU hotplug before.

During today's tests I did:

(1) set offline/online CPU 1 and 2
(2) perform suspend/resume afterwards

After that microcode update failed on some CPUs when performing
suspend/resume. (When skipping step 1, microcode update during
suspend/resume works.)

Looks strange, but should be debuggable.


Regards,

Andreas

--
Operating | Advanced Micro Devices GmbH
System | Karl-Hammerschmidt-Str. 34, 85609 Dornach b. München, Germany
Research | Geschäftsführer: Jochen Polster, Thomas M. McCoy, Giuliano Meroni
Center | Sitz: Dornach, Gemeinde Aschheim, Landkreis München
(OSRC) | Registergericht München, HRB Nr. 43632


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2009-03-12 19:01    [W:0.076 / U:25.016 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site