Default Comment by Bridge
** Attachment added: "Patch to increase RMA size to 512MB"
https://bugs.launchpad.net/bugs/1614309/+attachment/4723050/+files/0001-powerpc-pseries-Increase-RMA-size-to-512MB.patch
** Changed in: ubuntu
Assignee: (unassigned) => Taco Screen team (taco-screen-team)
** Package changed: ubuntu => linux (Ubuntu)
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https://bugs.launchpad.net/bugs/1614309
Title:
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:
New
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
Log:
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=9.40.193.34/24
netcfg/get_gateway=9.40.193.1 netcfg/get_nameservers=9.3.1.200
netcfg/get_hostname=ltc-brazos1.aus.stglabs.ibm.com suite=yakkety
scsi_mod.scan=sync sshd netcfg/get_domain=aus.stglabs.ibm.com unrestricted=
url=tftp://9.3.80.16/tftpboot/ubuntu-installer/ppc64el/ubuntu-server.seed-01-6c-ae-8b-6a-81-98
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 >
Regards
Praveen
== Comment: #8 - Sukadev Bhattiprolu - 2016-08-05 02:27:07 ==
Posted a couple of patches to the community for review:
http://marc.info/?l=linux-kernel&m=147037748624043&w=2
http://marc.info/?l=linux-kernel&m=147037768124064&w=2
== Comment: #12 - Sukadev Bhattiprolu - 2016-08-17 19:23:22 ==
Temporary fix to address the issue while the above patches are being
reviewed.
==
Canonical,
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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