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

Lee Schermerhorn
2007-07-26T13:53:27Z

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...

Lee