Bug#580901: core i3: suspend to disk break multithreading

[Bill Allombert <Bill.Allombert@math.u-bordeaux1.fr>]

On Thu, Sep 06, 2012 at 05:02:50PM +0200, Bill Allombert wrote:
> On Thu, Sep 06, 2012 at 01:44:52AM -0700, Jonathan Nieder wrote:
> > Hi Bill,
> > 
> > In May, 2010, Bill Allombert wrote:
> > 
> > > I have a Sony Vaio laptop with a core i3 processor, dual core and
> > > hyperthreaded to 4 virtual CPUs.  When compiling with 'make -j4', top
> > > show the 4 CPUs used.
> > >
> > > After suspend-to-disk however, performance degrade to the equivalent of a
> > > single core system
> > 
> > Thanks for a clear report.  This is said to be fixed by v2.6.32.22~118
> > (x86, tsc, sched: Recompute cyc2ns_offset's during resume from sleep
> > states, 2010-08-19), which was part of 2.6.32-24.  Can you confirm?
> 
> I will see if I can do that. The first kernel version which worked correctly
> on this laptop (including other issues I reported) was

I checked this version:
Package: linux-image-2.6.32-5-amd64
Version: 2.6.32-45
and it indeed fix this problem (but not all, alas).

Thanks for your support,
-- 
Bill. <ballombe@debian.org>

Imagine a large red swirl here.