------- Comment From praveen.pan...@in.ibm.com 2016-09-23 01:22 EDT-------
Hi ,

Verified this problem using http://ports.ubuntu.com/ubuntu-ports/dists

this proposed repo and not able to produce this issue any more .

Thanks for Fix !!


** Tags removed: verification-needed-xenial
** Tags added: verification-done verification-done-yakkety

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  Ubuntu16.10:installation fails on Brazos system (31TB and 192 cores)
  No memory for flatten_device_tree (no room)

Status in linux package in Ubuntu:
  Fix Committed
Status in linux source package in Xenial:
  Fix Released
Status in linux source package in Yakkety:
  Fix Committed

Bug description:
  == Comment: #0 - Praveen K. Pandey - 2016-07-16 10:00:52 ==
  Hi , 

    I tried  ubuntu16.10 Installation in brazos (configuration 31TB memory and 
192 cores) system . installation failing during prom_init when trying to 
allocate flatten_dt memory) System F/w is 
  FW860.00 (TC860_020).

  Reproducible Step :

  1- Configure Power VM  system having profile with  31TB memory and 1 92 Core
  2- Start Ubuntu16.10  Installation 

  Actual Result :

  Installation drop in F/w Console as failing during prom_init

  Expected Result :

  Installation Should went through


   Booting a command list

  OF stdout device is: /vdevice/v...@30000000nitrd.gz  34.84MiB  100%  
3.01MiB/s ]
  Preparing to boot Linux version 4.4.0-30-generic (buildd@bos01-ppc64el-023) 
(gcc version 5.3.1 20160413 (Ubuntu/IBM 5.3.1-14ubuntu2.1) ) #49-Ubuntu SMP Fri 
Jul 1 10:00:36 UTC 2016 (Ubuntu 4.4.0-30.49-generic 4.4.13)
  Detected machine type: 0000000000000101
  Max number of cores passed to firmware: 256 (NR_CPUS = 2048)
  Calling ibm,client-architecture-support... done
  command line: BOOT_IMAGE=/ubuntu-installer/ppc64el/yakkety/vmlinux 
tasks=standard pkgsel/language-pack-patterns= 
pkgsel/install-language-support=false DEBIAN_FRONTEND=text locale=en_US 
priority=low console-setup/ask_detect=false console-setup/layoutcode=us 
netcfg/disable_dhcp=true netcfg/confirm_static=true 
netcfg/choose_interface=6c:ae:8b:6a:81:98 netcfg/get_ipaddress= 
netcfg/get_gateway= netcfg/get_nameservers= 
netcfg/get_hostname=ltc-brazos1.aus.stglabs.ibm.com suite=yakkety 
scsi_mod.scan=sync sshd netcfg/get_domain=aus.stglabs.ibm.com unrestricted= 
 anna/choose_modules=network-console network-console/start=continue 
network-console/password=passw0rd network-console/password-again=passw0rd
  memory layout at init:
    memory_limit : 0000000000000000 (16 MB aligned)
    alloc_bottom : 000000000e3e0000
    alloc_top    : 0000000010000000
    alloc_top_hi : 0000000010000000
    rmo_top      : 0000000010000000
    ram_top      : 0000000010000000
  instantiating rtas at 0x000000000e9e0000... done
  prom_hold_cpus: skipped
  copying OF device tree...
  Building dt strings...
  Building dt structure...
  No memory for flatten_device_tree (no room)
  EXIT called ok
  0 > 


  == Comment: #8 - Sukadev Bhattiprolu  - 2016-08-05 02:27:07 ==
  Posted a couple of patches to the community for review: 


  == Comment: #12 - Sukadev Bhattiprolu - 2016-08-17 19:23:22 ==

  Temporary fix to address the issue while the above patches are being



  Please add the attached temporary fix to 16.10 to address the
  following issue while the upstream changes are being considered.

     When booting a very large system with a large initrd we run out of space
     for the flattened device tree (FDT). To fix this we must increase the
     space allocated for the RMA region.

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