On Thu, Jun 17, 2004 at 12:26:45PM +0200, Andi Kleen wrote:
> On Thu, 17 Jun 2004 10:54:00 +0200 (MEST)
> Mikael Pettersson <mikpe@csd.uu.se> wrote:
> 
> > On Wed, 16 Jun 2004 16:28:26 -0300, Peter Cordes wrote:
> > > I just noticed that on my Opteron cluster, the nodes that are running 64bit
> > >kernels have their clocks ticking at double speed.  This happens with
> > >Linux 2.4.26, and 2.4.27-pre2
> > 
> > I had the same problem: 2.4 x86-64 kernels ticking the clock
> > twice its normal speed, unless I booted with pci=noacpi.
> > 
> > This got fixed very recently I believe, in a 2.4.27-pre kernel.
> 
> In which one exactly? Most likely it was an ACPI problem/fix.
> Len, do you remember fixing such an issue?

 It's fixed in 2.4.27-pre3 and later.  Coincidentally or not, it was
released only 4 days after I mentioned the bug on debian-amd64 and
discuss@x86-64.  I'd narrow it down further, but kernel.org doesn't have -bk
patches for 2.4, and I don't know where to download more fine-grained patch
versions.

 (BTW, 2.4.27-pre6 doesn't compile without declaring 
struct task_struct *tsk;  in rwsem-spinlock.c:__rwsem_wake_one_writer.)

 Thanks for the help.

-- 
#define X(x,y) x##y
Peter Cordes ;  e-mail: X(peter@cor , des.ca)

"The gods confound the man who first found out how to distinguish the hours!
 Confound him, too, who in this place set up a sundial, to cut and hack
 my day so wretchedly into small pieces!" -- Plautus, 200 BC