On 01/28/2014 12:47 PM, Dave Jones wrote:
On Tue, Jan 28, 2014 at 12:47:11PM +0800, Tang Chen wrote:
> On 01/28/2014 11:55 AM, Dave Jones wrote:
> > On Tue, Jan 28, 2014 at 11:24:37AM +0800, Tang Chen wrote:
> >
> > > > I did a bisect with the patch above applied each step of the
way.
> > > > This time I got a plausible looking result....
> > >
> > > I cannot reproduce this. Would you please share how to reproduce
it ?
> > > Or does it just happen during the booting ?
> >
> > Just during boot. Very early. So early in fact, I have no logging
facilities
> > like usb-serial, just what is on vga console.
> >
> > If you want me to add some printk's, I can add a while (1); before
> > the part that oopses so we can diagnose further..
>
> Sure. Would you please do that for me ? Maybe we can find something in
> the early log.
I was hoping you'd have suggestions what you'd like me to dump ;-)
Sorry. I didn't say it clearly. :)
Seeing from your earlier mail, it crashed at:
while (zonelist_zone_idx(z) > highest_zoneidx)
de: 3b 77 08 cmp 0x8(%rdi),%esi
I stuck this at the top of the function..
printk(KERN_ERR "z:%p nodes:%p highest:%d\n", z, nodes,
highest_zoneidx);
and got
z: 1d08 nodes: (null) highest:3
nodes=null and highest=3, they are correct. When looking into
next_zones_zonelist(),
I cannot see why it crashed. So, can you print the zone id in the
for_each_zone_zonelist() loop in nr_free_zone_pages() ?
I want to know why it crashed. A NULL pointer ? Which one ?
Thanks.
Dave
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