[Crash-utility] Issues with kmem -i

[Sharyathi Nagesh]

Dave
	Please go through my observation.

> 
> That makes the most sense at this point.  This is what I was 
> planning for vm_init(): 
>   
> 
> @@ -694,7 +708,8 @@ vm_init(void) 
>                         vt->PG_slab = 10; 
>                 else if (THIS_KERNEL_VERSION >= LINUX(2,6,0)) 
>                         vt->PG_slab = 7; 
> -       } 
> +       } else if (THIS_KERNEL_VERSION >= LINUX(2,6,0)) 
> +               vt->PG_slab = 7; 
>  } 
here for the dump I was looking into vt->PG_slab needs to be set to 10
and not 7. as slab value was 1024 in dump_mem_map() function. 
>  /* 
>   
> > 
> >   
> > 
> > o The output is breaking as  totalhigh_pages is coming out zero, 
> > So part of code in function dump_kmeminfo() 
> > pct = freehighmem_pages ? 
> >                         (freehighmem_pages * 100)/totalhigh_pages :
> > 0; 
> > Cause Arithmetic calculation error. 
> > 
> > Still looking into the problem.
> > 
> I can't reproduce this one.  In your case though, with 
> about 500MB, both "freehighmem_pages" and "totalhigh_pages" 
> should both be zero, leading to a "pct" setting of 0. 
> Are you showing "freehighmem_pages" as non-zero? 
> 
> Dave 
I could see totalhigh_pages coming out zero which was the right thing
(As it was x86_64 machine) but freehighmem_pages came out as a non zero
quantity.
In function :dump_free_pages_zones_v2(). I could see vt->nr_zones as 4
which I feel is incorrect and hence it entered the block 
	if (i == ZONE_HIGHMEM) {
                                readmem(node_zones+
                                       OFFSET(zone_free_pages),
                                             KVADDR, &value,
sizeof(ulong),
                                             "node_zones free_pages",
                                             FAULT_ON_ERROR);
                                      sum += value;
                                }
and sum was updated with a value and hence freehighmem_pages causing
Arithmetic exception
Regards
Sharyathi Nagesh