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

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

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

Linux version 2.6.37-trunk-amd64 (Debian 2.6.37-1~experimental.1)
(ben@decadent.org.uk) (gcc version 4.4.5 (Debian 4.4.5-10) ) #1 SMP Thu Jan 6
14:13:28 UTC 2011

Cheers,
-- 
Bill. <ballombe@debian.org>

Imagine a large red swirl here.