Re: ubifs mount size

Dallas Foley
2008-09-10T02:55:08Z

Artem Bityutskiy wrote:
> Hi,
>
> On Thu, 2008-08-21 at 20:24 +0300, Artem Bityutskiy wrote:
>>> root@tsi-sa2410:~# ubimkvol /dev/ubi1 -N root -s 55MiB
>>> Volume ID 0, size 3755 LEBs (57676800 bytes, 55.0 MiB), LEB size 15360
>>> bytes (15.0 KiB), dynamic, name "root", alignment 1
>>> root@tsi-sa2410:~# mount -t ubifs ubi1:root /mnt/linux2-root/
>>> UBIFS: default file-system created
>>> UBIFS: background thread "ubifs_bgt1_0" started, PID 930
>>> UBIFS: mounted UBI device 1, volume 0, name "root"
>>> UBIFS: file system size: 57292800 bytes (55950 KiB, 54 MiB, 3730 LEBs)
>>> UBIFS: journal size: 2872320 bytes (2805 KiB, 2 MiB, 187 LEBs)
>>> UBIFS: default compressor: LZO
>>> UBIFS: media format 4, latest format 4
>>> root@tsi-sa2410:~# df
>>> Filesystem 1k-blocks Used Available Use% Mounted on
>>> rootfs 8059 5284 2366 69% /
>>> /dev/root 8059 5284 2366 69% /
>>> /dev/root 8059 5284 2366 69% /dev/.static/dev
>>> ubi1:root 33968 0 31204 0% /mnt/linux2-root
>> I've explored this a little. Currently UBIFS indeed reports 15%-20% less
>> free space than it actually has, and we'll try to fix this.
>
> We have improved UBIFS free space reporting and it should be much better
> now. Please, pull master branch of the ubifs-2.6.git tree to find the
> fixes.
>
Yes, looks good now.

I'm now using a different size nand device (128MiB, 2KiB page size). 2
partitions in the driver as (16MiB, and 112MiB), which I've just mapped
1:1 with ubimkvol (ie. ubimkvol /dev/ubi0 -N boot -m and
ubimkvol /dev/ubi1 -N root -m)

root@Linux tsi-tpcxx 2.6.27-rc5-next-20080905 #1 Wed Sep 10 02:22:05 UTC

2008 armv4tl unknowntsi-tpcxx:~# df
Filesystem 1k-blocks Used Available Use% Mounted on
rootfs 102744 13096 84588 13% /
ubi1:root 102744 13096 84588 13% /
ubi0:boot 12916 1692 10520 14% /boot