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

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

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On Thu, 26 Jul 2007 09:53:27 -0400
Lee Schermerhorn <Lee.Schermerhornhp.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/lk
ml/2007/7/26/161

Thanks,
-Kame
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On Thu, 2007-07-26 at 09:53 -0400, Lee Schermerhorn 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...
> 

After applying the hotfixes from Andrew's repository and the
patches
from the mailing lists listed below, I'm booting 23-rc1-mm1
with a zx1
specific config [on an sx1000].  Gotta run for a meeting,
but I'll try
generic kernel this pm.  Then back to testing memoryless
node
patches, ...

Other "hot fixes":

2 of Mel Gorman's patches to fix ia64 mmap corruption [mm
list]
Yasuaki Ishimatsu's assign irq vector fix [ia64 list]
Kenji Kaneshige's "wrong access to vector" patch
[ia64 list]
Kame-san's sparsemem-vmemmap fix [lkml]

Lee


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