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Subject: Re: ubirmvol:ing gluebied volumes
From: Artem Bityutskiy <dedekind1@gmail.com>
To: Ricard Wanderlof <ricard.wanderlof@axis.com>
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Date: Fri, 06 May 2011 22:07:45 +0300
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On Fri, 2011-05-06 at 14:17 +0200, Ricard Wanderlof wrote:
> I enabled the gluebi MTD emulation layer in the kernel, and was pleased to 
> see all the UBI volumes coming up in /proc/mtd as mtd volumes.

Hehe :-)

> However, one thing though, if I try to ubirmvol one of the UBI volumes, I 
> get:
> 
> ubirmvol: error!: cannot UBI remove volume
>            error 16 (Device or resource busy)

Yeah.

> similar to what I get if I have a mounted ubifs residing in an UBI volume 
> and try and ubirmvol the volume without umounting the file system.

Yes.

> Fair enough, I guess gluebi is keeping the UBI volume busy? But then how 
> do I free it up?

I think the only way is to rmmod gluebi.

>  There's normally no way to disassociate mtd partitions 
> from the underlying media, and I can't see any ubi tool that would do this 
> either.

Right.

> So is this an (unfortunate) consequence of using gluebi: that the 
> underlying UBI volumes can't be removed?

In current implementation yes. But you can rmomod it, shuffle UBI
volumes, and modprobe it again.

-- 
Best Regards,
Artem Bityutskiy (Артём Битюцкий)