Re: 2.6.23-rc1-mm1: boot hang on ia64 with memoryless nodes

KAMEZAWA Hiroyuki
2007-07-26T14:00:31Z

On Thu, 26 Jul 2007 09:53:27 -0400
Lee Schermerhorn <Lee.Schermerhorn@hp.com> wrote:

> On Wed, 2007-07-25 at 17:18 -0400, Lee Schermerhorn wrote:
> > On Wed, 2007-07-25 at 12:38 -0700, Christoph Lameter wrote:
> > > (ccing Andy who did the work on the config stuff)
> > >
> > > On Wed, 25 Jul 2007, Lee Schermerhorn wrote:
> > >
> > > > I tried to deselect SPARSEMEM_VMEMMAP. Kconfig's "def_bool=y" wouldn't
> > > > let me :-(. After hacking the Kconfig and mm/sparse.c to allow that,
> > > > boot hangs with no error messages shortly after "Built N zonelists..."
> > > > message.
> > >
> > > I get a similar hang here and see the system looping in softirq / hrtimer
> > > code.
> > >
> > > > Backed off to DISCONTIGMEM+VIRTUAL_MEMORY_MAP, and saw same hang as with
> > > > (SPARSMEM && !SPARSEMEM_VMEMMAP).
> > >
> > > So its not related to SPARSE VMEMMAP? General VMEMMAP issue on IA64?
> >
> > This hang is different from the one I see with SPARSE VMEMMAP -- no
> > "Unable to handle kernel paging request..." message. Just hangs after
> > "Built N zonelists..." and some message about "color" that I didn't
> > capture. Next time [:-(]...
>
> The "color" message was actually:
>
> Console: colour dummy device 80x25
>
> So, now I'm wondering if I'm hitting the "Regression in serial
> console..." issue, and the system was actually booting--I just didn't
> see any output. If so, the "Unable to handle kernel paging request..."
> hang might well be a problem with SPARSEMEM_VMEMMAP...
>
About SPARSEMEM_VMEMMAP try this:
http://lkml.org/lkml/2007/7/26/161

Thanks,
-Kame