[FS#617] Root overlay FS is too small given available flash

[LEDE Bugs]

A new Flyspray task has been opened.  Details are below. 

User who did this - mjaustin2 (mjaustin2) 

Attached to Project - LEDE Project
Summary - Root overlay FS is too small given available flash
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Low
Priority - Very Low
Reported Version - lede-17.01
Due in Version - Undecided
Due Date - Undecided
Details - WRT1900ACSv2 - r3205-59508e3

root at ap2:~# df -k
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/root                 2560      2560         0 100% /rom
tmpfs                   256804        80    256724   0% /tmp
/dev/ubi0_1              24196       744     22184   3% /overlay
overlayfs:/overlay       24196       744     22184   3% /
ubi1:syscfg              30276       292     28404   1% /tmp/syscfg
tmpfs                      512         0       512   0% /dev


   
The WRT1900ACS has 128 MB of flash divided into two partitions. The 64 MB partition presented to LEDE is inefficiently allocated with 24 MB to overlay and 30 MB to /tmp/syscfg. On my system, /tmp/syscfg is only using 292 K. Having such a small overlay with so much space wasted by syscfg prevents installing larger packages like GCC or other programs that could be used to enhance the platform. 

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=617