[OpenWrt-Devel] [PATCH 1/2] imx6: bootscript: enable UBI fastmap support

[Richard Weinberger]

Koen,

----- Ursprüngliche Mail -----
> 
> I'm also seeing this warning:
> 
> 
> [    0.000000] Kernel command line: console=ttymxc1,115200 ubi0:ubi
> ubi.mtd=2 rootfstype=squashfs,ubifs ubi.fm_autoconvert=1
> 
> [    2.356304] ubi0: default fastmap pool size: 95
> [    2.360850] ubi0: default fastmap WL pool size: 47
> [    2.365684] ubi0: attaching mtd2
> [    2.551317] random: crng init done
> [    2.786708] ubi0: scanning is finished
> 
> [    2.795380] ubi0 warning: ubi_eba_init: cannot reserve enough PEBs
> for bad PEB handling, reserved 38, need 40        <---
> 
> [    2.806651] ubi0: attached mtd2 (name "ubi", size 239 MiB)
> [    2.812151] ubi0: PEB size: 131072 bytes (128 KiB), LEB size: 126976
> bytes
> [    2.819051] ubi0: min./max. I/O unit sizes: 2048/2048, sub-page size 2048
> [    2.825855] ubi0: VID header offset: 2048 (aligned 2048), data
> offset: 4096
> [    2.832825] ubi0: good PEBs: 1912, bad PEBs: 0, corrupted PEBs: 0
> [    2.838937] ubi0: user volume: 3, internal volumes: 1, max. volumes
> count: 128
> [    2.846175] ubi0: max/mean erase counter: 4/1, WL threshold: 4096,
> image sequence number: 1659699605
> [    2.855327] ubi0: available PEBs: 0, total reserved PEBs: 1912, PEBs
> reserved for bad PEB handling: 38
> [    2.864657] ubi0: background thread "ubi_bgt0d" started, PID 826
> [    2.871496] block ubiblock0_1: created from ubi0:1(rootfs)
> [    2.877025] ubiblock: device ubiblock0_1 (rootfs) set to be root
> filesystem
> 
> 
> It doesn't seem to be a coincidence that it's missing 2 PEB's while
> fastmap uses 2 of them

Did you create this UBI offline? If you choose a layout which leaves almost
no empty blocks, this can happen.

Thanks,
//richard

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