On 25/09/2013 13:10, Richard Weinberger wrote:
Hi!
Am 25.09.2013 12:59, schrieb Richard Genoud:
[CC u-boot ML since it may not be a kernel only related bug(s)]
Hi Richard, Artem,
I'm still playing with fastmap and I ran into something. It's involving u-boot's "ubi write" command and fastmap. What I'm doing is:
- Flashing a mtd partition with a userspace.ubi image via u-boot
- Booting linux one or to times
- Flashing the UBI volume rootfs with a rootfs.ubifs image via u-boot
- Booting linux one or to times.
And, depending on fastmap not compiled/disable/auto I've got an ubi_assert that fails and a slowpath warning.
Here's the story: U-Boot 2013.07 Kernel 3.11.1
Before we waste time, please ensure that you have all recent UBI fixes applied. UBI: Fix PEB leak in wear_leveling_worker() (Merged into 3.12-rc1, on it's way to -stable) UBI: Fix invalidate_fastmap() (Merged into 3.12-rc1) UBI: Fix refill_wl_user_pool() (Pending, http://lkml.org/lkml/2013/8/26/121)
yes, I have them: git log --oneline v3.11.1..HEAD -- drivers/mtd/ubi/ 241bac5 UBI: fix refill_wl_user_pool() a5858cf UBI: Fix invalidate_fastmap() fd00289 UBI: Fix PEB leak in wear_leveling_worker()
NAND:
- 128KiB PEB
- 2KiB page
- 2048 PEB
- no subpage
mapping is: 0x000000000000-0x000000020000 : "dtb" (128KiB) 0x000000020000-0x000000a00000 : "Kernel" (9.875KiB) 0x000000a00000-0x00000ff80000 : "UBI" (245.5 KiB) 0x00000ff80000-0x000010000000 : "BBT" (512KiB)
1- With Fastmap NOT compiled
- Flashing the UBI mtd partition under u-boot:
fatload usb 0 0x20008000 /userspace.ubi nand device ubi nand erase.part ubi
NAND erase.part: device 0 offset 0xa00000, size 0xf580000 OK
nand write.trimffs 0x20008000 ubi 35a0000
NAND write: device 0 offset 0xa00000, size 0x35a0000 56229888 bytes written: OK Booting a non-FASTMAP kernel: [...] [ 0.789062] UBI: attaching mtd2 to ubi0 [ 1.351562] UBI: scanning is finished [ 1.367187] UBI: attached mtd2 (name "UBI", size 245 MiB) to ubi0 [ 1.375000] UBI: PEB size: 131072 bytes (128 KiB), LEB size: 126976 bytes [ 1.382812] UBI: min./max. I/O unit sizes: 2048/2048, sub-page size 2048 [ 1.390625] UBI: VID header offset: 2048 (aligned 2048), data offset: 4096 [ 1.398437] UBI: good PEBs: 1964, bad PEBs: 0, corrupted PEBs: 0 [ 1.398437] UBI: user volume: 3, internal volumes: 1, max. volumes count: 128 [ 1.406250] UBI: max/mean erase counter: 0/0, WL threshold: 4096, image sequence number: 891983656 [ 1.414062] UBI: available PEBs: 2, total reserved PEBs: 1962, PEBs reserved for bad PEB handling: 40 [ 1.421875] UBI: background thread "ubi_bgt0d" started, PID 354 [ 1.437500] UBIFS: background thread "ubifs_bgt0_0" started, PID 356 [ 1.523437] UBIFS: mounted UBI device 0, volume 0, name "rootfs" [ 1.523437] UBIFS: LEB size: 126976 bytes (124 KiB), min./max. I/O unit sizes: 2048 bytes/2048 bytes [ 1.531250] UBIFS: FS size: 63614976 bytes (60 MiB, 501 LEBs), journal size 8634368 bytes (8 MiB, 68 LEBs) [ 1.539062] UBIFS: reserved for root: 0 bytes (0 KiB) [ 1.546875] UBIFS: media format: w4/r0 (latest is w4/r0), UUID 47FE5308-55FD-4F1C-BD13-C23AED232326, small LPT model
=> OK
Now, under u-boot, flashing only the ubi volume "rootfs":
fatload usb 0 0x20008000 /rootfs.ubifs
54218752 bytes read in 3259 ms (15.9 MiB/s)
ubi part ubi
UBI: attaching mtd1 to ubi0 UBI: physical eraseblock size: 131072 bytes (128 KiB) UBI: logical eraseblock size: 126976 bytes UBI: smallest flash I/O unit: 2048 UBI: VID header offset: 2048 (aligned 2048) UBI: data offset: 4096 UBI: attached mtd1 to ubi0 UBI: MTD device name: "mtd=2" UBI: MTD device size: 245 MiB UBI: number of good PEBs: 1964 UBI: number of bad PEBs: 0 UBI: max. allowed volumes: 128 UBI: wear-leveling threshold: 4096 UBI: number of internal volumes: 1 UBI: number of user volumes: 3 UBI: available PEBs: 23 UBI: total number of reserved PEBs: 1941 UBI: number of PEBs reserved for bad PEB handling: 19 UBI: max/mean erase counter: 2/0
ubi write 0x20008000 rootfs 33b5000
54218752 bytes written to volume rootfs
Booting the same kernel: [ 0.812500] UBI: attaching mtd2 to ubi0 [ 1.664062] UBI: scanning is finished [ 1.687500] UBI: attached mtd2 (name "UBI", size 245 MiB) to ubi0 [ 1.687500] UBI: PEB size: 131072 bytes (128 KiB), LEB size: 126976 bytes [ 1.695312] UBI: min./max. I/O unit sizes: 2048/2048, sub-page size 2048 [ 1.703125] UBI: VID header offset: 2048 (aligned 2048), data offset: 4096 [ 1.710937] UBI: good PEBs: 1964, bad PEBs: 0, corrupted PEBs: 0 [ 1.718750] UBI: user volume: 3, internal volumes: 1, max. volumes count: 128 [ 1.718750] UBI: max/mean erase counter: 3/1, WL threshold: 4096, image sequence number: 891983656 [ 1.726562] UBI: available PEBs: 2, total reserved PEBs: 1962, PEBs reserved for bad PEB handling: 40 [ 1.734375] UBI: background thread "ubi_bgt0d" started, PID 354 [ 1.750000] UBIFS: background thread "ubifs_bgt0_0" started, PID 356 [ 1.789062] UBIFS: mounted UBI device 0, volume 0, name "rootfs" [ 1.796875] UBIFS: LEB size: 126976 bytes (124 KiB), min./max. I/O unit sizes: 2048 bytes/2048 bytes [ 1.804687] UBIFS: FS size: 63614976 bytes (60 MiB, 501 LEBs), journal size 8634368 bytes (8 MiB, 68 LEBs) [ 1.812500] UBIFS: reserved for root: 0 bytes (0 KiB) [ 1.812500] UBIFS: media format: w4/r0 (latest is w4/r0), UUID 47FE5308-55FD-4F1C-BD13-C23AED232326, small LPT model
=> all OK
2- With Fastmap compiled and ubi.fm_autoconvert=0
- Flashing the UBI mtd partition under u-boot:
fatload usb 0 0x20008000 /userspace.ubi nand device ubi nand erase.part ubi
NAND erase.part: device 0 offset 0xa00000, size 0xf580000 OK
nand write.trimffs 0x20008000 ubi 35a0000
NAND write: device 0 offset 0xa00000, size 0x35a0000 56229888 bytes written: OK Booting a FASTMAP kernel: [...] [ 0.812500] UBI: default fastmap pool size: 95 [ 0.820312] UBI: default fastmap WL pool size: 25 [ 0.820312] UBI: attaching mtd2 to ubi0 [ 1.289062] UBI: scanning is finished [ 1.304687] UBI: attached mtd2 (name "UBI", size 245 MiB) to ubi0 [ 1.312500] UBI: PEB size: 131072 bytes (128 KiB), LEB size: 126976 bytes [ 1.320312] UBI: min./max. I/O unit sizes: 2048/2048, sub-page size 2048 [ 1.328125] UBI: VID header offset: 2048 (aligned 2048), data offset: 4096 [ 1.328125] UBI: good PEBs: 1964, bad PEBs: 0, corrupted PEBs: 0 [ 1.335937] UBI: user volume: 3, internal volumes: 1, max. volumes count: 128 [ 1.343750] UBI: max/mean erase counter: 0/0, WL threshold: 4096, image sequence number: 891983656 [ 1.351562] UBI: available PEBs: 0, total reserved PEBs: 1964, PEBs reserved for bad PEB handling: 40 [ 1.359375] UBI: background thread "ubi_bgt0d" started, PID 355 [ 1.453125] UBIFS: background thread "ubifs_bgt0_0" started, PID 357 [ 1.515625] UBIFS: mounted UBI device 0, volume 0, name "rootfs" [ 1.515625] UBIFS: LEB size: 126976 bytes (124 KiB), min./max. I/O unit sizes: 2048 bytes/2048 bytes [ 1.523437] UBIFS: FS size: 63614976 bytes (60 MiB, 501 LEBs), journal size 8634368 bytes (8 MiB, 68 LEBs) [ 1.531250] UBIFS: reserved for root: 0 bytes (0 KiB) [ 1.539062] UBIFS: media format: w4/r0 (latest is w4/r0), UUID 47FE5308-55FD-4F1C-BD13-C23AED232326, small LPT model => OK
Rebooting: : [ 0.812500] UBI: default fastmap pool size: 95 [ 0.820312] UBI: default fastmap WL pool size: 25 [ 0.820312] UBI: attaching mtd2 to ubi0 [ 1.578125] UBI: scanning is finished [ 1.601562] UBI: attached mtd2 (name "UBI", size 245 MiB) to ubi0 [ 1.609375] UBI: PEB size: 131072 bytes (128 KiB), LEB size: 126976 bytes [ 1.617187] UBI: min./max. I/O unit sizes: 2048/2048, sub-page size 2048 [ 1.617187] UBI: VID header offset: 2048 (aligned 2048), data offset: 4096 [ 1.625000] UBI: good PEBs: 1964, bad PEBs: 0, corrupted PEBs: 0 [ 1.632812] UBI: user volume: 3, internal volumes: 1, max. volumes count: 128 [ 1.640625] UBI: max/mean erase counter: 2/0, WL threshold: 4096, image sequence number: 891983656 [ 1.648437] UBI: available PEBs: 0, total reserved PEBs: 1964, PEBs reserved for bad PEB handling: 40 [ 1.656250] UBI: background thread "ubi_bgt0d" started, PID 355
Still ok.
Now, under u-boot, flashing only the ubi volume "rootfs":
fatload usb 0 0x20008000 /rootfs.ubifs
54218752 bytes read in 3259 ms (15.9 MiB/s)
ubi part ubi
UBI: attaching mtd1 to ubi0 UBI: physical eraseblock size: 131072 bytes (128 KiB) UBI: logical eraseblock size: 126976 bytes UBI: smallest flash I/O unit: 2048 UBI: VID header offset: 2048 (aligned 2048) UBI: data offset: 4096 UBI: attached mtd1 to ubi0 UBI: MTD device name: "mtd=2" UBI: MTD device size: 245 MiB UBI: number of good PEBs: 1964 UBI: number of bad PEBs: 0 UBI: max. allowed volumes: 128 UBI: wear-leveling threshold: 4096 UBI: number of internal volumes: 1 UBI: number of user volumes: 3 UBI: available PEBs: 23 UBI: total number of reserved PEBs: 1941 UBI: number of PEBs reserved for bad PEB handling: 19 UBI: max/mean erase counter: 2/0
ubi write 0x20008000 rootfs 33b5000
54218752 bytes written to volume rootfs
Booting the same kernel: [ 0.804687] UBI: default fastmap pool size: 95 [ 0.812500] UBI: default fastmap WL pool size: 25 [ 0.812500] UBI: attaching mtd2 to ubi0 [ 1.570312] UBI: scanning is finished [ 1.593750] UBI: attached mtd2 (name "UBI", size 245 MiB) to ubi0 [ 1.601562] UBI: PEB size: 131072 bytes (128 KiB), LEB size: 126976 bytes [ 1.609375] UBI: min./max. I/O unit sizes: 2048/2048, sub-page size 2048 [ 1.609375] UBI: VID header offset: 2048 (aligned 2048), data offset: 4096 [ 1.617187] UBI: good PEBs: 1964, bad PEBs: 0, corrupted PEBs: 0 [ 1.625000] UBI: user volume: 3, internal volumes: 1, max. volumes count: 128 [ 1.632812] UBI: max/mean erase counter: 3/1, WL threshold: 4096, image sequence number: 891983656 [ 1.640625] UBI: available PEBs: 0, total reserved PEBs: 1964, PEBs reserved for bad PEB handling: 40 [ 1.648437] UBI: background thread "ubi_bgt0d" started, PID 355 [ 1.664062] UBIFS: background thread "ubifs_bgt0_0" started, PID 357 [ 1.703125] UBIFS: mounted UBI device 0, volume 0, name "rootfs" [ 1.710937] UBIFS: LEB size: 126976 bytes (124 KiB), min./max. I/O unit sizes: 2048 bytes/2048 bytes [ 1.718750] UBIFS: FS size: 63614976 bytes (60 MiB, 501 LEBs), journal size 8634368 bytes (8 MiB, 68 LEBs) [ 1.726562] UBIFS: reserved for root: 0 bytes (0 KiB) [ 1.734375] UBIFS: media format: w4/r0 (latest is w4/r0), UUID 47FE5308-55FD-4F1C-BD13-C23AED232326, small LPT model => All OK (I rebooted one or two times, no problem showing up)
Now, booting with ubi.fm_autoconvert=1: [ 0.812500] UBI: default fastmap pool size: 95 [ 0.820312] UBI: default fastmap WL pool size: 25 [ 0.820312] UBI: attaching mtd2 to ubi0 [ 1.578125] UBI: scanning is finished [ 1.601562] UBI: attached mtd2 (name "UBI", size 245 MiB) to ubi0 [ 1.609375] UBI: PEB size: 131072 bytes (128 KiB), LEB size: 126976 bytes [ 1.609375] UBI: min./max. I/O unit sizes: 2048/2048, sub-page size 2048 [ 1.617187] UBI: VID header offset: 2048 (aligned 2048), data offset: 4096 [ 1.625000] UBI: good PEBs: 1964, bad PEBs: 0, corrupted PEBs: 0 [ 1.632812] UBI: user volume: 3, internal volumes: 1, max. volumes count: 128 [ 1.640625] UBI: max/mean erase counter: 3/1, WL threshold: 4096, image sequence number: 891983656 [ 1.648437] UBI: available PEBs: 0, total reserved PEBs: 1964, PEBs reserved for bad PEB handling: 40 [ 1.656250] UBI: background thread "ubi_bgt0d" started, PID 355 [ 1.671875] UBIFS: background thread "ubifs_bgt0_0" started, PID 357 [ 1.710937] UBIFS: mounted UBI device 0, volume 0, name "rootfs" [ 1.718750] UBIFS: LEB size: 126976 bytes (124 KiB), min./max. I/O unit sizes: 2048 bytes/2048 bytes [ 1.726562] UBIFS: FS size: 63614976 bytes (60 MiB, 501 LEBs), journal size 8634368 bytes (8 MiB, 68 LEBs) [ 1.734375] UBIFS: reserved for root: 0 bytes (0 KiB) [ 1.742187] UBIFS: media format: w4/r0 (latest is w4/r0), UUID 47FE5308-55FD-4F1C-BD13-C23AED232326, small LPT model => Still OK Rebooting again with ubi.fm_autoconvert=1: [ 0.812500] UBI: default fastmap pool size: 95 [ 0.820312] UBI: default fastmap WL pool size: 25 [ 0.820312] UBI: attaching mtd2 to ubi0 [ 0.851562] UBI error: ubi_scan_fastmap: Attach by fastmap failed, doing a full scan!
This is not the top most error. Do you have to full log? Would be nice to know why fastmap has fallen back to a full scan.
Here's the full log for this one: Uncompressing Linux... done, booting the kernel. [ 0.000000] Booting Linux on physical CPU 0x0 [ 0.000000] Linux version 3.11.1 (rgenoud@lnx-rg) (gcc version 4.7.3 (Buildroot 2013.05-00178-gd93036d-dirty) ) #5 Tue Sep 24 15:24:16 CEST 2013 [ 0.000000] CPU: ARM926EJ-S [41069265] revision 5 (ARMv5TEJ), cr=00053177 [ 0.000000] CPU: VIVT data cache, VIVT instruction cache [ 0.000000] Machine: Atmel AT91SAM (Device Tree), model: Paratronic LNS [ 0.000000] Memory policy: ECC disabled, Data cache writeback [ 0.000000] AT91: Detected soc type: at91sam9x5 [ 0.000000] AT91: Detected soc subtype: at91sam9g35 [ 0.000000] AT91: sram at 0x300000 of 0x8000 mapped at 0xfef70000 [ 0.000000] On node 0 totalpages: 32768 [ 0.000000] free_area_init_node: node 0, pgdat c0374ccc, node_mem_map c03a6000 [ 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] Clocks: CPU 400 MHz, master 133 MHz, main 12.000 MHz [ 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: console=ttyS0,115200 loglevel=8 ubi.fm_autoconvert=1 rw root=ubi0:rootfs rootfstype=ubifs ubi.mtd=UBI [ 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] Memory: 126100K/131072K available (2474K kernel code, 140K rwdata, 776K rodata, 115K init, 194K bss, 4972K reserved) [ 0.000000] Virtual kernel memory layout: [ 0.000000] vector : 0xffff0000 - 0xffff1000 ( 4 kB) [ 0.000000] fixmap : 0xfff00000 - 0xfffe0000 ( 896 kB) [ 0.000000] vmalloc : 0xc8800000 - 0xff000000 ( 872 MB) [ 0.000000] lowmem : 0xc0000000 - 0xc8000000 ( 128 MB) [ 0.000000] modules : 0xbf000000 - 0xc0000000 ( 16 MB) [ 0.000000] .text : 0xc0008000 - 0xc0334eec (3252 kB) [ 0.000000] .init : 0xc0335000 - 0xc0351f14 ( 116 kB) [ 0.000000] .data : 0xc0352000 - 0xc03753a0 ( 141 kB) [ 0.000000] .bss : 0xc03753a0 - 0xc03a5cf8 ( 195 kB) [ 0.000000] NR_IRQS:16 nr_irqs:16 16 [ 0.000000] sched_clock: 32 bits at 128 Hz, resolution 7812500ns, wraps every 3489660920ms [ 0.000000] Console: colour dummy device 80x30 [ 0.054687] Calibrating delay loop... 198.76 BogoMIPS (lpj=775168) [ 0.054687] pid_max: default: 32768 minimum: 301 [ 0.062500] Mount-cache hash table entries: 512 [ 0.070312] CPU: Testing write buffer coherency: ok [ 0.070312] Setting up static identity map for 0xc0257aa8 - 0xc0257ae4 [ 0.078125] devtmpfs: initialized [ 0.078125] pinctrl core: initialized pinctrl subsystem [ 0.078125] NET: Registered protocol family 16 [ 0.078125] DMA: preallocated 256 KiB pool for atomic coherent allocations [ 0.109375] gpio-at91 fffff400.gpio: at address fefff400 [ 0.109375] gpio-at91 fffff600.gpio: at address fefff600 [ 0.109375] gpio-at91 fffff800.gpio: at address fefff800 [ 0.117187] gpio-at91 fffffa00.gpio: at address fefffa00 [ 0.117187] pinctrl-at91 pinctrl.2: initialized AT91 pinctrl driver [ 0.117187] tcb_clksrc: tc0 at 16.166 MHz [ 0.148437] bio: create slab <bio-0> at 0 [ 0.148437] at_hdmac ffffec00.dma-controller: Atmel AHB DMA Controller ( cpy slave ), 8 channels [ 0.156250] at_hdmac ffffee00.dma-controller: Atmel AHB DMA Controller ( cpy slave ), 8 channels [ 0.164062] Switched to clocksource tcb_clksrc [ 0.218750] NET: Registered protocol family 2 [ 0.218750] TCP established hash table entries: 1024 (order: 1, 8192 bytes) [ 0.218750] TCP bind hash table entries: 1024 (order: 0, 4096 bytes) [ 0.218750] TCP: Hash tables configured (established 1024 bind 1024) [ 0.218750] TCP: reno registered [ 0.218750] UDP hash table entries: 256 (order: 0, 4096 bytes) [ 0.218750] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes) [ 0.218750] NET: Registered protocol family 1 [ 0.218750] RPC: Registered named UNIX socket transport module. [ 0.218750] RPC: Registered udp transport module. [ 0.218750] RPC: Registered tcp transport module. [ 0.218750] RPC: Registered tcp NFSv4.1 backchannel transport module. [ 0.226562] NetWinder Floating Point Emulator V0.97 (double precision) [ 0.226562] msgmni has been set to 246 [ 0.234375] NET: Registered protocol family 38 [ 0.234375] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 253) [ 0.234375] io scheduler noop registered (default) [ 0.242187] gpio-export gpio_export.5: 16 gpio(s) exported [ 0.242187] fffff200.serial: ttyS0 at MMIO 0xfffff200 (irq = 16) is a ATMEL_SERIAL [ 0.593750] console [ttyS0] enabled [ 0.601562] f801c000.serial: ttyS1 at MMIO 0xf801c000 (irq = 23) is a ATMEL_SERIAL [ 0.609375] f8020000.serial: ttyS2 at MMIO 0xf8020000 (irq = 24) is a ATMEL_SERIAL [ 0.625000] brd: module loaded [ 0.640625] loop: module loaded [ 0.656250] atmel_nand: Use On Flash BBT [ 0.656250] atmel_nand 40000000.nand: Using dma0chan0 for DMA transfers. [ 0.664062] ONFI param page 0 valid [ 0.671875] ONFI flash detected [ 0.671875] NAND device: Manufacturer ID: 0x2c, Chip ID: 0xda (Micron MT29F2G08ABAEAWP), 256MiB, page size: 2048, OOB size: 64 [ 0.679687] atmel_nand 40000000.nand: ONFI params, minimum required ECC: 4 bits in 512 bytes [ 0.687500] atmel_nand 40000000.nand: Initialize PMECC params, cap: 4, sector: 512 [ 0.695312] Bad block table found at page 131008, version 0x01 [ 0.703125] Bad block table found at page 130944, version 0x01 [ 0.710937] 4 ofpart partitions found on MTD device atmel_nand [ 0.710937] Creating 4 MTD partitions on "atmel_nand": [ 0.718750] 0x000000000000-0x000000020000 : "dtb" [ 0.726562] 0x000000020000-0x000000a00000 : "Kernel" [ 0.734375] 0x000000a00000-0x00000ff80000 : "UBI" [ 0.742187] 0x00000ff80000-0x000010000000 : "BBT" [ 0.757812] libphy: MACB_mii_bus: probed [ 0.765625] macb f802c000.ethernet eth0: Cadence MACB at 0xf802c000 irq 25 (00:04:a3:91:c4:e3) [ 0.773437] macb f802c000.ethernet eth0: attached PHY driver [Davicom DM9161A] (mii_bus:phy_addr=f802c000.etherne:00, irq=-1) [ 0.781250] at91sam9_wdt: sorry, watchdog is disabled [ 0.789062] at91_wdt: probe of fffffe40.wdt failed with error -5 [ 0.796875] TCP: cubic registered [ 0.804687] NET: Registered protocol family 17 [ 0.804687] Key type dns_resolver registered [ 0.812500] UBI: default fastmap pool size: 95 [ 0.820312] UBI: default fastmap WL pool size: 25 [ 0.820312] UBI: attaching mtd2 to ubi0 [ 0.851562] UBI error: ubi_scan_fastmap: Attach by fastmap failed, doing a full scan! [ 1.593750] UBI: scanning is finished [ 1.601562] UBI assert failed in ubi_wl_init at 1967 (pid 1) [ 1.609375] CPU: 0 PID: 1 Comm: swapper Not tainted 3.11.1 #5 [ 1.617187] [<c0012e20>] (unwind_backtrace+0x0/0xe0) from [<c0010bb8>] (show_stack+0x10/0x14) [ 1.625000] [<c0010bb8>] (show_stack+0x10/0x14) from [<c01a0704>] (ubi_wl_init+0x3d0/0x4b8) [ 1.632812] [<c01a0704>] (ubi_wl_init+0x3d0/0x4b8) from [<c01a2cd4>] (ubi_attach+0x270/0x34c) [ 1.640625] [<c01a2cd4>] (ubi_attach+0x270/0x34c) from [<c0197678>] (ubi_attach_mtd_dev+0x2b8/0x86c) [ 1.648437] [<c0197678>] (ubi_attach_mtd_dev+0x2b8/0x86c) from [<c0346630>] (ubi_init+0x1d8/0x29c) [ 1.656250] [<c0346630>] (ubi_init+0x1d8/0x29c) from [<c0008810>] (do_one_initcall+0x94/0x144) [ 1.664062] [<c0008810>] (do_one_initcall+0x94/0x144) from [<c0335a9c>] (kernel_init_freeable+0xe8/0x1ac) [ 1.671875] [<c0335a9c>] (kernel_init_freeable+0xe8/0x1ac) from [<c0251500>] (kernel_init+0x8/0xe4) [ 1.679687] [<c0251500>] (kernel_init+0x8/0xe4) from [<c000e590>] (ret_from_fork+0x14/0x24) [ 1.695312] UBI: attached mtd2 (name "UBI", size 245 MiB) to ubi0 [ 1.703125] UBI: PEB size: 131072 bytes (128 KiB), LEB size: 126976 bytes [ 1.703125] UBI: min./max. I/O unit sizes: 2048/2048, sub-page size 2048 [ 1.710937] UBI: VID header offset: 2048 (aligned 2048), data offset: 4096 [ 1.718750] UBI: good PEBs: 1964, bad PEBs: 0, corrupted PEBs: 0 [ 1.726562] UBI: user volume: 3, internal volumes: 1, max. volumes count: 128 [ 1.726562] UBI: max/mean erase counter: 3/1, WL threshold: 4096, image sequence number: 891983656 [ 1.734375] UBI: available PEBs: 0, total reserved PEBs: 1964, PEBs reserved for bad PEB handling: 40 [ 1.742187] UBI: background thread "ubi_bgt0d" started, PID 355 [ 1.757812] UBIFS: background thread "ubifs_bgt0_0" started, PID 357 [ 1.796875] UBIFS: mounted UBI device 0, volume 0, name "rootfs" [ 1.804687] UBIFS: LEB size: 126976 bytes (124 KiB), min./max. I/O unit sizes: 2048 bytes/2048 bytes [ 1.812500] UBIFS: FS size: 63614976 bytes (60 MiB, 501 LEBs), journal size 8634368 bytes (8 MiB, 68 LEBs) [ 1.820312] UBIFS: reserved for root: 0 bytes (0 KiB) [ 1.820312] UBIFS: media format: w4/r0 (latest is w4/r0), UUID 47FE5308-55FD-4F1C-BD13-C23AED232326, small LPT model [ 1.828125] VFS: Mounted root (ubifs filesystem) on device 0:11. [ 1.835937] devtmpfs: mounted [ 1.835937] Freeing unused kernel memory: 112K (c0335000 - c0351000) [ 2.187500] UBI error: ubi_update_fastmap: could not find any anchor PEB [ 2.195312] UBI warning: ubi_update_fastmap: Unable to write new fastmap, err=-28
=> If I reboot again, I still have those error messages.
3- With Fastmap compiled and ubi.fm_autoconvert=1
- Flashing the UBI mtd partition under u-boot:
fatload usb 0 0x20008000 /userspace.ubi nand device ubi nand erase.part ubi
NAND erase.part: device 0 offset 0xa00000, size 0xf580000 OK
nand write.trimffs 0x20008000 ubi 35a0000
NAND write: device 0 offset 0xa00000, size 0x35a0000 56229888 bytes written: OK Booting a FASTMAP kernel with ubi.fm_autoconvert=1: [...] [ 0.812500] UBI: default fastmap pool size: 95 [ 0.820312] UBI: default fastmap WL pool size: 25 [ 0.820312] UBI: attaching mtd2 to ubi0 [ 1.289062] UBI: scanning is finished [ 1.304687] UBI: attached mtd2 (name "UBI", size 245 MiB) to ubi0 [ 1.312500] UBI: PEB size: 131072 bytes (128 KiB), LEB size: 126976 bytes [ 1.320312] UBI: min./max. I/O unit sizes: 2048/2048, sub-page size 2048 [ 1.328125] UBI: VID header offset: 2048 (aligned 2048), data offset: 4096 [ 1.328125] UBI: good PEBs: 1964, bad PEBs: 0, corrupted PEBs: 0 [ 1.335937] UBI: user volume: 3, internal volumes: 1, max. volumes count: 128 [ 1.343750] UBI: max/mean erase counter: 0/0, WL threshold: 4096, image sequence number: 891983656 [ 1.351562] UBI: available PEBs: 0, total reserved PEBs: 1964, PEBs reserved for bad PEB handling: 40 [ 1.359375] UBI: background thread "ubi_bgt0d" started, PID 355 [ 1.437500] UBI error: ubi_update_fastmap: could not find any anchor PEB [ 1.445312] UBI warning: ubi_update_fastmap: Unable to write new fastmap, err=-28 =>OK
Rebooting 2 times to let FASTMAP show its power: [ 0.812500] UBI: default fastmap pool size: 95 [ 0.820312] UBI: default fastmap WL pool size: 25 [ 0.820312] UBI: attaching mtd2 to ubi0 [ 0.929687] UBI: attached by fastmap [ 0.937500] UBI: fastmap pool size: 95 [ 0.937500] UBI: fastmap WL pool size: 25 [ 0.960937] UBI: attached mtd2 (name "UBI", size 245 MiB) to ubi0 GREAT !
Now, under u-boot, flashing only the ubi volume "rootfs":
fatload usb 0 0x20008000 /rootfs.ubifs
54218752 bytes read in 3259 ms (15.9 MiB/s)
ubi part ubi
UBI: attaching mtd1 to ubi0 UBI: physical eraseblock size: 131072 bytes (128 KiB) UBI: logical eraseblock size: 126976 bytes UBI: smallest flash I/O unit: 2048 UBI: VID header offset: 2048 (aligned 2048) UBI: data offset: 4096 UBI: "delete" compatible internal volume 2147479552:0 found, remove it UBI: attached mtd1 to ubi0 UBI: MTD device name: "mtd=2" UBI: MTD device size: 245 MiB UBI: number of good PEBs: 1964 UBI: number of bad PEBs: 0 UBI: max. allowed volumes: 128 UBI: wear-leveling threshold: 4096 UBI: number of internal volumes: 1 UBI: number of user volumes: 3 UBI: available PEBs: 23 UBI: total number of reserved PEBs: 1941 UBI: number of PEBs reserved for bad PEB handling: 19 UBI: max/mean erase counter: 2/0
ubi write 0x20008000 rootfs 33b5000
54218752 bytes written to volume rootfs
=>FASTMAP internal volume has been erased, which is the expected behaviour.
Booting the same kernel, still with ubi.fm_autoconvert=1: [...] [ 0.812500] UBI: default fastmap pool size: 95 [ 0.820312] UBI: default fastmap WL pool size: 25 [ 0.820312] UBI: attaching mtd2 to ubi0 [ 1.585937] UBI: scanning is finished [ 1.601562] UBI: attached mtd2 (name "UBI", size 245 MiB) to ubi0 [ 1.609375] UBI: PEB size: 131072 bytes (128 KiB), LEB size: 126976 bytes [ 1.617187] UBI: min./max. I/O unit sizes: 2048/2048, sub-page size 2048 [ 1.625000] UBI: VID header offset: 2048 (aligned 2048), data offset: 4096 [ 1.625000] UBI: good PEBs: 1964, bad PEBs: 0, corrupted PEBs: 0 [ 1.632812] UBI: user volume: 3, internal volumes: 1, max. volumes count: 128 [ 1.640625] UBI: max/mean erase counter: 4/1, WL threshold: 4096, image sequence number: 891983656 [ 1.648437] UBI: available PEBs: 0, total reserved PEBs: 1964, PEBs reserved for bad PEB handling: 40 [ 1.656250] UBI: background thread "ubi_bgt0d" started, PID 355 [ 1.703125] UBIFS: background thread "ubifs_bgt0_0" started, PID 357 [ 1.734375] UBIFS: mounted UBI device 0, volume 0, name "rootfs" [ 1.742187] UBIFS: LEB size: 126976 bytes (124 KiB), min./max. I/O unit sizes: 2048 bytes/2048 bytes [ 1.750000] UBIFS: FS size: 63614976 bytes (60 MiB, 501 LEBs), journal size 8634368 bytes (8 MiB, 68 LEBs) [ 1.757812] UBIFS: reserved for root: 0 bytes (0 KiB) [ 1.765625] UBIFS: media format: w4/r0 (latest is w4/r0), UUID 47FE5308-55FD-4F1C-BD13-C23AED232326, small LPT model =>OK this time, let's reboot:
[ 0.812500] UBI: default fastmap pool size: 95 [ 0.820312] UBI: default fastmap WL pool size: 25 [ 0.820312] UBI: attaching mtd2 to ubi0 [ 0.914062] UBI error: scan_pool: bad image seq: 0x0, expected: 0x352a9728 [ 0.921875] ------------[ cut here ]------------ [ 0.929687] WARNING: CPU: 0 PID: 1 at drivers/mtd/ubi/fastmap.c:829 ubi_attach_fastmap+0xd38/0xda0()
This bug got most likely fixed by "UBI: Fix PEB leak in wear_leveling_worker()".
Well, I'm afraid it's not. But I'm going to redo those tests with UBI debug enabled to be really really sure.
[ 0.937500] Modules linked in: [ 0.937500] CPU: 0 PID: 1 Comm: swapper Not tainted 3.11.1 #5 [ 0.945312] [<c0012e20>] (unwind_backtrace+0x0/0xe0) from [<c0010bb8>] (show_stack+0x10/0x14) [ 0.953125] [<c0010bb8>] (show_stack+0x10/0x14) from [<c001ab2c>] (warn_slowpath_common+0x60/0x80) [ 0.960937] [<c001ab2c>] (warn_slowpath_common+0x60/0x80) from [<c001ab64>] (warn_slowpath_null+0x18/0x1c) [ 0.968750] [<c001ab64>] (warn_slowpath_null+0x18/0x1c) from [<c01a5c8c>] (ubi_attach_fastmap+0xd38/0xda0) [ 0.976562] [<c01a5c8c>] (ubi_attach_fastmap+0xd38/0xda0) from [<c01a62d4>] (ubi_scan_fastmap+0x5b4/0x7b8) [ 0.984375] [<c01a62d4>] (ubi_scan_fastmap+0x5b4/0x7b8) from [<c01a2c2c>] (ubi_attach+0x1c8/0x34c) [ 0.992187] [<c01a2c2c>] (ubi_attach+0x1c8/0x34c) from [<c0197678>] (ubi_attach_mtd_dev+0x2b8/0x86c) [ 1.000000] [<c0197678>] (ubi_attach_mtd_dev+0x2b8/0x86c) from [<c0346630>] (ubi_init+0x1d8/0x29c) [ 1.007812] [<c0346630>] (ubi_init+0x1d8/0x29c) from [<c0008810>] (do_one_initcall+0x94/0x144) [ 1.015625] [<c0008810>] (do_one_initcall+0x94/0x144) from [<c0335a9c>] (kernel_init_freeable+0xe8/0x1ac) [ 1.023437] [<c0335a9c>] (kernel_init_freeable+0xe8/0x1ac) from [<c0251500>] (kernel_init+0x8/0xe4) [ 1.031250] [<c0251500>] (kernel_init+0x8/0xe4) from [<c000e590>] (ret_from_fork+0x14/0x24) [ 1.039062] ---[ end trace 313a7957427257d8 ]--- [ 1.039062] UBI error: ubi_scan_fastmap: Attach by fastmap failed, doing a full scan! [ 1.781250] UBI: scanning is finished [ 1.796875] UBI assert failed in ubi_wl_init at 1967 (pid 1) [ 1.796875] CPU: 0 PID: 1 Comm: swapper Tainted: G W 3.11.1 #5 [ 1.804687] [<c0012e20>] (unwind_backtrace+0x0/0xe0) from [<c0010bb8>] (show_stack+0x10/0x14) [ 1.812500] [<c0010bb8>] (show_stack+0x10/0x14) from [<c01a0704>] (ubi_wl_init+0x3d0/0x4b8) [ 1.820312] [<c01a0704>] (ubi_wl_init+0x3d0/0x4b8) from [<c01a2cd4>] (ubi_attach+0x270/0x34c) [ 1.828125] [<c01a2cd4>] (ubi_attach+0x270/0x34c) from [<c0197678>] (ubi_attach_mtd_dev+0x2b8/0x86c) [ 1.835937] [<c0197678>] (ubi_attach_mtd_dev+0x2b8/0x86c) from [<c0346630>] (ubi_init+0x1d8/0x29c) [ 1.843750] [<c0346630>] (ubi_init+0x1d8/0x29c) from [<c0008810>] (do_one_initcall+0x94/0x144) [ 1.851562] [<c0008810>] (do_one_initcall+0x94/0x144) from [<c0335a9c>] (kernel_init_freeable+0xe8/0x1ac) [ 1.859375] [<c0335a9c>] (kernel_init_freeable+0xe8/0x1ac) from [<c0251500>] (kernel_init+0x8/0xe4) [ 1.867187] [<c0251500>] (kernel_init+0x8/0xe4) from [<c000e590>] (ret_from_fork+0x14/0x24) [ 1.882812] UBI: attached mtd2 (name "UBI", size 245 MiB) to ubi0 [ 1.890625] UBI: PEB size: 131072 bytes (128 KiB), LEB size: 126976 bytes [ 1.898437] UBI: min./max. I/O unit sizes: 2048/2048, sub-page size 2048 [ 1.898437] UBI: VID header offset: 2048 (aligned 2048), data offset: 4096 [ 1.906250] UBI: good PEBs: 1964, bad PEBs: 0, corrupted PEBs: 0 [ 1.914062] UBI: user volume: 3, internal volumes: 1, max. volumes count: 128 [ 1.921875] UBI: max/mean erase counter: 4/1, WL threshold: 4096, image sequence number: 891983656 [ 1.929687] UBI: available PEBs: 0, total reserved PEBs: 1964, PEBs reserved for bad PEB handling: 40 [ 1.937500] UBI: background thread "ubi_bgt0d" started, PID 355 [ 1.953125] UBIFS: background thread "ubifs_bgt0_0" started, PID 357 [ 1.992187] UBIFS: mounted UBI device 0, volume 0, name "rootfs" [ 2.000000] UBIFS: LEB size: 126976 bytes (124 KiB), min./max. I/O unit sizes: 2048 bytes/2048 bytes [ 2.007812] UBIFS: FS size: 63614976 bytes (60 MiB, 501 LEBs), journal size 8634368 bytes (8 MiB, 68 LEBs) [ 2.015625] UBIFS: reserved for root: 0 bytes (0 KiB) [ 2.023437] UBIFS: media format: w4/r0 (latest is w4/r0), UUID 47FE5308-55FD-4F1C-BD13-C23AED232326, small LPT model [ 2.031250] VFS: Mounted root (ubifs filesystem) on device 0:11. [ 2.039062] devtmpfs: mounted [ 2.046875] Freeing unused kernel memory: 112K (c0335000 - c0351000) [ 2.390625] UBI error: ubi_update_fastmap: could not find any anchor PEB [ 2.398437] UBI warning: ubi_update_fastmap: Unable to write new fastmap, err=-28
Thanks, //richard
Thanks !