[solved] OpenWRT, 128MB flash, mégis kicsi az írható overlay

Kedves Fórumozók!

Két-három éve vettem egy WNDR3700v4-et, amire OpenWRT-t tettem.
Ennek a modellnek annyi a különlegessége, hogy NAND flash-sel szerelték, mégpedig 128 MB-nyival.
Mostanság buildeltem magamnak egy 18.06.1, amire fel is upgrade-eltem, de egy probléma megmaradt (3 évvel ezelőttről): az írható overlay továbbra is kb. 14 MB.

root@OpenWrt:/# df -h
Filesystem                Size      Used Available Use% Mounted on
/dev/root                 5.3M      5.3M         0 100% /rom
tmpfs                    61.0M    664.0K     60.3M   1% /tmp
/dev/ubi0_1              11.2M    300.0K     10.3M   3% /overlay
overlayfs:/overlay       11.2M    300.0K     10.3M   3% /
tmpfs                   512.0K         0    512.0K   0% /dev

A dmesg pedig így néz ki:

root@bielefeld:~# dmesg
[    0.000000] Linux version 4.9.120 (janos@debian-build.lan) (gcc version 7.3.0 (OpenWrt GCC 7.3.0 r7188-b0b5c64c22) ) #0 Thu Aug 16 07:51:15 2018
[    0.000000] bootconsole [early0] enabled
[    0.000000] CPU0 revision is: 0001974c (MIPS 74Kc)
[    0.000000] SoC: Atheros AR9344 rev 2
[    0.000000] Determined physical RAM map:
[    0.000000]  memory: 08000000 @ 00000000 (usable)
[    0.000000] Initrd not found or empty - disabling initrd
[    0.000000] Primary instruction cache 64kB, VIPT, 4-way, linesize 32 bytes.
[    0.000000] Primary data cache 32kB, 4-way, VIPT, cache aliases, linesize 32 bytes
[    0.000000] Zone ranges:
[    0.000000]   Normal   [mem 0x0000000000000000-0x0000000007ffffff]
[    0.000000] Movable zone start for each node
[    0.000000] Early memory node ranges
[    0.000000]   node   0: [mem 0x0000000000000000-0x0000000007ffffff]
[    0.000000] Initmem setup node 0 [mem 0x0000000000000000-0x0000000007ffffff]
[    0.000000] On node 0 totalpages: 32768
[    0.000000] free_area_init_node: node 0, pgdat 804aa964, node_mem_map 81000020
[    0.000000]   Normal zone: 256 pages used for memmap
[    0.000000]   Normal zone: 0 pages reserved
[    0.000000]   Normal zone: 32768 pages, LIFO batch:7
[    0.000000] pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768
[    0.000000] pcpu-alloc: [0] 0
[    0.000000] Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 32512
[    0.000000] Kernel command line:  board=WNDR3700_V4 console=ttyS0,115200 mtdparts=ar934x-nfc:256k(u-boot)ro,256k(u-boot-env)ro,256k(caldata)ro,512k(pot),2048k(language),512k(config),3072k(traffic_meter),2048k(kernel),23552k(ubi),25600k@0x6c0000(firmware),256k(caldata_backup),-(reserved) rootfstype=squashfs noinitrd
[    0.000000] PID hash table entries: 512 (order: -1, 2048 bytes)
[    0.000000] Dentry cache hash table entries: 16384 (order: 4, 65536 bytes)
[    0.000000] Inode-cache hash table entries: 8192 (order: 3, 32768 bytes)
[    0.000000] Writing ErrCtl register=00000000
[    0.000000] Readback ErrCtl register=00000000
[    0.000000] Memory: 124684K/131072K available (3439K kernel code, 148K rwdata, 808K rodata, 204K init, 211K bss, 6388K reserved, 0K cma-reserved)
[    0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[    0.000000] NR_IRQS:51
[    0.000000] Clocks: CPU:560.000MHz, DDR:400.000MHz, AHB:200.000MHz, Ref:40.000MHz
[    0.000000] clocksource: MIPS: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 6825930166 ns
[    0.000010] sched_clock: 32 bits at 280MHz, resolution 3ns, wraps every 7669584382ns
[    0.008319] Calibrating delay loop... 278.93 BogoMIPS (lpj=1394688)
[    0.081148] pid_max: default: 32768 minimum: 301
[    0.086173] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
[    0.093220] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
[    0.103590] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[    0.114092] futex hash table entries: 256 (order: -1, 3072 bytes)
[    0.121166] NET: Registered protocol family 16
[    0.127411] MIPS: machine is NETGEAR WNDR3700v4
[    0.132485] ar71xx: using random MAC address for eth0
[    0.370546] registering PCI controller with io_map_base unset
[    0.391473] PCI host bridge to bus 0000:00
[    0.395844] pci_bus 0000:00: root bus resource [mem 0x10000000-0x13ffffff]
[    0.403209] pci_bus 0000:00: root bus resource [io  0x0000]
[    0.409140] pci_bus 0000:00: root bus resource [??? 0x00000000 flags 0x0]
[    0.416377] pci_bus 0000:00: No busn resource found for root bus, will use [bus 00-ff]
[    0.424836] pci 0000:00:00.0: [168c:0033] type 00 class 0x028000
[    0.424847] pci 0000:00:00.0: invalid calibration data
[    0.430356] pci 0000:00:00.0: reg 0x10: [mem 0x00000000-0x0001ffff 64bit]
[    0.430411] pci 0000:00:00.0: reg 0x30: [mem 0x00000000-0x0000ffff pref]
[    0.430486] pci 0000:00:00.0: supports D1
[    0.430497] pci 0000:00:00.0: PME# supported from D0 D1 D3hot
[    0.430727] pci_bus 0000:00: busn_res: [bus 00-ff] end is updated to 00
[    0.430755] pci 0000:00:00.0: BAR 0: assigned [mem 0x10000000-0x1001ffff 64bit]
[    0.438551] pci 0000:00:00.0: BAR 6: assigned [mem 0x10020000-0x1002ffff pref]
[    0.446274] pci 0000:00:00.0: using irq 40 for pin 1
[    0.452276] clocksource: Switched to clocksource MIPS
[    0.458815] NET: Registered protocol family 2
[    0.464327] TCP established hash table entries: 1024 (order: 0, 4096 bytes)
[    0.471755] TCP bind hash table entries: 1024 (order: 0, 4096 bytes)
[    0.478578] TCP: Hash tables configured (established 1024 bind 1024)
[    0.485445] UDP hash table entries: 256 (order: 0, 4096 bytes)
[    0.491672] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
[    0.498638] NET: Registered protocol family 1
[    0.503367] PCI: CLS 0 bytes, default 32
[    0.508091] Crashlog allocated RAM at address 0x3f00000
[    0.514807] workingset: timestamp_bits=30 max_order=15 bucket_order=0
[    0.528951] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[    0.535205] jffs2: version 2.2 (NAND) (SUMMARY) (LZMA) (RTIME) (CMODE_PRIORITY) (c) 2001-2006 Red Hat, Inc.
[    0.555497] io scheduler noop registered
[    0.559671] io scheduler deadline registered (default)
[    0.565586] Serial: 8250/16550 driver, 1 ports, IRQ sharing disabled
[    0.572822] console [ttyS0] disabled
[    0.596707] serial8250.0: ttyS0 at MMIO 0x18020000 (irq = 11, base_baud = 2500000) is a 16550A
[    0.605908] console [ttyS0] enabled
[    0.613336] bootconsole [early0] disabled
[    0.625413] nand: device found, Manufacturer ID: 0x2c, Chip ID: 0xf1
[    0.631866] nand: Micron NAND 128MiB 3,3V 8-bit
[    0.636503] nand: 128 MiB, SLC, erase size: 128 KiB, page size: 2048, OOB size: 64
[    0.644230] Scanning device for bad blocks
[    0.652176] random: fast init done
[    0.734393] 12 cmdlinepart partitions found on MTD device ar934x-nfc
[    0.740834] Creating 12 MTD partitions on "ar934x-nfc":
[    0.746168] 0x000000000000-0x000000040000 : "u-boot"
[    0.753256] 0x000000040000-0x000000080000 : "u-boot-env"
[    0.760769] 0x000000080000-0x0000000c0000 : "caldata"
[    0.768028] 0x0000000c0000-0x000000140000 : "pot"
[    0.774938] 0x000000140000-0x000000340000 : "language"
[    0.782238] 0x000000340000-0x0000003c0000 : "config"
[    0.789434] 0x0000003c0000-0x0000006c0000 : "traffic_meter"
[    0.797247] 0x0000006c0000-0x0000008c0000 : "kernel"
[    0.804428] 0x0000008c0000-0x000001fc0000 : "ubi"
[    0.811413] 0x0000006c0000-0x000001fc0000 : "firmware"
[    1.173605] 0x000001fc0000-0x000002000000 : "caldata_backup"
[    1.181274] 0x000002000000-0x000008000000 : "reserved"
[    1.189937] libphy: Fixed MDIO Bus: probed
[    1.198848] switch0: Atheros AR8327 rev. 4 switch registered on ag71xx-mdio.0
[    1.864275] libphy: ag71xx_mdio: probed
[    2.493623] ag71xx ag71xx.0: connected to PHY at ag71xx-mdio.0:00 [uid=004dd034, driver=Atheros AR8216/AR8236/AR8316]
[    2.505159] eth0: Atheros AG71xx at 0xb9000000, irq 4, mode:RGMII
[    2.513786] NET: Registered protocol family 10
[    2.522875] NET: Registered protocol family 17
[    2.527542] 8021q: 802.1Q VLAN Support v1.8
[    2.535658] UBI: auto-attach mtd8
[    2.539059] ubi0: attaching mtd8
[    2.813077] ubi0: scanning is finished
[    2.833367] ubi0: attached mtd8 (name "ubi", size 23 MiB)
[    2.838856] ubi0: PEB size: 131072 bytes (128 KiB), LEB size: 126976 bytes
[    2.845880] ubi0: min./max. I/O unit sizes: 2048/2048, sub-page size 2048
[    2.852780] ubi0: VID header offset: 2048 (aligned 2048), data offset: 4096
[    2.859841] ubi0: good PEBs: 184, bad PEBs: 0, corrupted PEBs: 0
[    2.865944] ubi0: user volume: 2, internal volumes: 1, max. volumes count: 128
[    2.873284] ubi0: max/mean erase counter: 5/3, WL threshold: 4096, image sequence number: 1124120555
[    2.882558] ubi0: available PEBs: 0, total reserved PEBs: 184, PEBs reserved for bad PEB handling: 20
[    2.891959] ubi0: background thread "ubi_bgt0d" started, PID 330
[    2.899917] block ubiblock0_0: created from ubi0:0(rootfs)
[    2.905552] ubiblock: device ubiblock0_0 (rootfs) set to be root filesystem
[    2.919144] VFS: Mounted root (squashfs filesystem) readonly on device 254:0.
[    2.927450] Freeing unused kernel memory: 204K
[    2.931963] This architecture does not have kernel memory protection.
[    3.620565] init: Console is alive
[    3.624328] init: - watchdog -
[    4.921854] kmodloader: loading kernel modules from /etc/modules-boot.d/*
[    5.002105] usbcore: registered new interface driver usbfs
[    5.007843] usbcore: registered new interface driver hub
[    5.013359] usbcore: registered new device driver usb
[    5.024285] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    5.040542] SCSI subsystem initialized
[    5.049573] ehci-platform: EHCI generic platform driver
[    5.055032] ehci-platform ehci-platform: EHCI Host Controller
[    5.060891] ehci-platform ehci-platform: new USB bus registered, assigned bus number 1
[    5.071029] ehci-platform ehci-platform: irq 3, io mem 0x1b000000
[    5.102330] ehci-platform ehci-platform: USB 2.0 started, EHCI 1.00
[    5.109671] hub 1-0:1.0: USB hub found
[    5.113867] hub 1-0:1.0: 1 port detected
[    5.121028] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[    5.128790] ohci-platform: OHCI generic platform driver
[    5.136816] uhci_hcd: USB Universal Host Controller Interface driver
[    5.147967] usbcore: registered new interface driver usb-storage
[    5.154716] kmodloader: done loading kernel modules from /etc/modules-boot.d/*
[    5.172559] init: - preinit -
[    5.932879] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[    5.967682] random: procd: uninitialized urandom read (4 bytes read)
[    6.993539] eth0: link up (1000Mbps/Full duplex)
[    6.998317] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[    9.259441] UBIFS (ubi0:1): background thread "ubifs_bgt0_1" started, PID 415
[    9.325647] random: crng init done
[    9.579630] UBIFS (ubi0:1): UBIFS: mounted UBI device 0, volume 1, name "rootfs_data"
[    9.587631] UBIFS (ubi0:1): LEB size: 126976 bytes (124 KiB), min./max. I/O unit sizes: 2048 bytes/2048 bytes
[    9.597703] UBIFS (ubi0:1): FS size: 13459456 bytes (12 MiB, 106 LEBs), journal size 1015809 bytes (0 MiB, 6 LEBs)
[    9.608223] UBIFS (ubi0:1): reserved for root: 635722 bytes (620 KiB)
[    9.614776] UBIFS (ubi0:1): media format: w4/r0 (latest is w4/r0), UUID 22FC68F0-B5FC-4E95-93A4-54AF75BB1DDF, small LPT model
[    9.628420] mount_root: overlay filesystem has not been fully initialized yet
[    9.636595] mount_root: switching to ubifs overlay
[    9.781441] urandom-seed: Seed file not found (/etc/urandom.seed)
[    9.954528] eth0: link down
[    9.969352] procd: - early -
[    9.973144] procd: - watchdog -
[   10.648326] procd: - watchdog -
[   10.651798] procd: - ubus -
[   10.743348] procd: - init -
[   11.073836] kmodloader: loading kernel modules from /etc/modules.d/*
[   11.087607] zram: Added device: zram0
[   11.096292] tun: Universal TUN/TAP device driver, 1.6
[   11.101427] tun: (C) 1999-2004 Max Krasnyansky 
[   11.116724] ip6_tables: (C) 2000-2006 Netfilter Core Team
[   11.138440] usbcore: registered new interface driver cdc_acm
[   11.144242] cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters
[   11.154862] usbcore: registered new interface driver cdc_wdm
[   11.162704] Loading modules backported from Linux version wt-2017-11-01-0-gfe248fc2c180
[   11.170832] Backport generated by backports.git v4.14-rc2-1-31-g86cf0e5d
[   11.181005] ip_tables: (C) 2000-2006 Netfilter Core Team
[   11.199352] nf_conntrack version 0.5.0 (2048 buckets, 8192 max)
[   11.265534] usbcore: registered new interface driver usbserial
[   11.271562] usbcore: registered new interface driver usbserial_generic
[   11.278367] usbserial: USB Serial support registered for generic
[   11.294170] wireguard: WireGuard 0.0.20180718 loaded. See www.wireguard.com for information.
[   11.302790] wireguard: Copyright (C) 2015-2018 Jason A. Donenfeld . All Rights Reserved.
[   11.330810] xt_time: kernel timezone is -0000
[   11.337817] usbcore: registered new interface driver cdc_ether
[   11.347644] usbcore: registered new interface driver cdc_ncm
[   11.380124] usbcore: registered new interface driver huawei_cdc_ncm
[   11.469094] PPP generic driver version 2.4.2
[   11.476255] NET: Registered protocol family 24
[   11.513732] usbcore: registered new interface driver cdc_mbim
[   11.522618] usbcore: registered new interface driver option
[   11.528376] usbserial: USB Serial support registered for GSM modem (1-port)
[   11.553823] ath9k ar934x_wmac: Direct firmware load for soc_wmac.eeprom failed with error -2
[   11.562441] ath9k ar934x_wmac: Falling back to user helper
[   11.728849] ath: EEPROM regdomain: 0x0
[   11.728858] ath: EEPROM indicates default country code should be used
[   11.728862] ath: doing EEPROM country->regdmn map search
[   11.728878] ath: country maps to regdmn code: 0x3a
[   11.728883] ath: Country alpha2 being used: US
[   11.728887] ath: Regpair used: 0x3a
[   11.741324] ieee80211 phy0: Selected rate control algorithm 'minstrel_ht'
[   11.745421] ieee80211 phy0: Atheros AR9340 Rev:2 mem=0xb8100000, irq=47
[   11.752389] PCI: Enabling device 0000:00:00.0 (0000 -> 0002)
[   11.759215] ath9k 0000:00:00.0: Direct firmware load for pci_wmac0.eeprom failed with error -2
[   11.768014] ath9k 0000:00:00.0: Falling back to user helper
[   12.351928] ath: EEPROM regdomain: 0x0
[   12.351937] ath: EEPROM indicates default country code should be used
[   12.351940] ath: doing EEPROM country->regdmn map search
[   12.351956] ath: country maps to regdmn code: 0x3a
[   12.351961] ath: Country alpha2 being used: US
[   12.351965] ath: Regpair used: 0x3a
[   12.361734] ieee80211 phy1: Selected rate control algorithm 'minstrel_ht'
[   12.365846] ieee80211 phy1: Atheros AR9300 Rev:4 mem=0xb0000000, irq=40
[   12.401468] kmodloader: done loading kernel modules from /etc/modules.d/*
[   27.038538] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[   27.069739] br-lan: port 1(eth0.1) entered blocking state
[   27.075284] br-lan: port 1(eth0.1) entered disabled state
[   27.081184] device eth0.1 entered promiscuous mode
[   27.086103] device eth0 entered promiscuous mode
[   27.157378] IPv6: ADDRCONF(NETDEV_UP): br-lan: link is not ready
[   27.252512] IPv6: ADDRCONF(NETDEV_UP): eth0.2: link is not ready
[   28.113822] eth0: link up (1000Mbps/Full duplex)
[   28.118582] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[   28.162416] br-lan: port 1(eth0.1) entered blocking state
[   28.167908] br-lan: port 1(eth0.1) entered forwarding state
[   28.173785] IPv6: ADDRCONF(NETDEV_CHANGE): eth0.2: link becomes ready
[   28.232517] IPv6: ADDRCONF(NETDEV_CHANGE): br-lan: link becomes ready

Tehát röviden: a flash végén van egy nagyobb szabad chunk/partíció, amit adott esetben lehetne használni írható overlay-nek, de sajnos a mostanit és a terület végén levőt nem lehet összevonni.
Vagy legalábbis nem tudom, hogyan kellene.

Üdv:
János