for-next/pgtable branch: OOM error with 16K page size

[Jaggi, Manish]

Hi All,

I am trying to use the for-next/pgtable branch with the top commit, 

commit 068a17a5805dfbca4bbf03e664ca6b19709cc7a8
Author: Mark Rutland <mark.rutland at arm.com>
Date:   Mon Jan 25 11:45:12 2016 +0000

    arm64: mm: create new fine-grained mappings at boot    

Setup: ARMv8, Cavium ThunderX, 48Cores 64G ram.
linux config: defconfig + 16k page size.

Observations:
a) During linux boot I see some oom messages 
http://pastebin.com/8jSMFhqf

b) cat /proc/meminfo

MemTotal:         66613760 kB  
MemFree:          307328 kB       
MemAvailable:      22416 kB  

Available memory is very less compared to total.

c) With 64K pagesize 
MemTotal:       66831552 kB       
MemFree:         3541184 kB       
MemAvailable:    3298752 kB    

So it seems there is some issue with 16k only. 
Need some inputs how to fix this

 Regards, 
Manish Jaggi