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Subject: Re: UBIFS ubimkvol issue and some others...
From: Artem Bityutskiy <dedekind@infradead.org>
To: Stanislav Popov <s.popov@rsc.bg>
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Date: Thu, 28 May 2009 18:16:40 +0300
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On Thu, 2009-05-28 at 15:44 +0300, Stanislav Popov wrote:
> Hi all,
> 
> I am trying to use UbiFS but having some issues.
> I read the documentations and FAQs for UBI and UbiFS.
> My kernel is pretty old (2.6.21) (I am not able to update it now)
> but I successfully added UbiFS in it!

How? It is not trivial. Did you use my old 2.6.21 backport tree?

> I have problems with some of the coomands:
> ------------------------------------------------------
> # /mtdinfo
> Count of MTD devices:           6
> Present MTD devices:
> mtdinfo: error!: libmtd failed get MTD device 0 information
>          error 2 (No such file or directory)
> ------------------------------------------------------
> The following is one of the main issues:
> # /ubiformat /dev//mtd5
> ubiformat: error!: cannot get information about "/dev//mtd5"
>            error 2 (No such file or directory)

Do you have /dev/mtd* devices?
What is in /proc/mtd?

> [<c01bcca0>] (ubi_eba_unmap_leb+0x0/0xac) from [<c01b8c84>] 
> (ubi_change_vtbl_record+0xb0/0x114)
>  r8:c3289e68 r7:c1d6dbd0 r6:00000000 r5:c1d6d800 r4:c3289d70
> [<c01b8bd4>] (ubi_change_vtbl_record+0x0/0x114) from [<c01ba444>] 
> (ubi_create_volume+0x510/0x640)
>  r7:00000000 r6:00000000 r5:c3289d70 r4:c29b9140
> [<c01b9f34>] (ubi_create_volume+0x0/0x640) from [<c01bbe80>] 
> (ubi_cdev_ioctl+0x26c/0x3dc)
> [<c01bbc14>] (ubi_cdev_ioctl+0x0/0x3dc) from [<c008fdd4>] 
> (do_ioctl+0x7c/0x90)
> [<c008fd58>] (do_ioctl+0x0/0x90) from [<c00900bc>] (vfs_ioctl+0x2d4/0x2f4)
>  r7:00000036 r6:bee7cb78 r5:c28dd280 r4:c2975d40
> [<c008fde8>] (vfs_ioctl+0x0/0x2f4) from [<c009011c>] (sys_ioctl+0x40/0x64)
>  r9:c3288000 r8:c0023744 r6:40986f00 r5:fffffff7 r4:c2975d40
> [<c00900dc>] (sys_ioctl+0x0/0x64) from [<c0022f60>] 
> (ret_fast_syscall+0x0/0x2c)
>  r6:bee7cc40 r5:bee7cf97 r4:00000003
> Code: e5931004 e24b202c e50b302c e5832004 (e5812000
> 
> Set volume siznote: ubimkvol[705] exited with preempt_count 2
> e to 64329216
> BUG: scheduling while atomic: ubimkvol/0x40000002/705
> Segmentation fault

Not sure. Probably related to your back-port. You'll have
to debug this yourself.

-- 
Best regards,
Artem Bityutskiy (Битюцкий Артём)