Re: 2.6.11-rc3-mm1 : can't insmod dm-mod

[Andrew Morton]

Laurent Riffard <laurent.riffard@xxxxxxx> wrote:
>
> Le 04.02.2005 19:33, Andrew Morton a écrit :
>  > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.11-rc3/2.6.11-rc3-mm1/
>  >
> 
>  loading dm-mod module fails with this message :
> 
>  FATAL: Error inserting dm-mod
>  (/lib/modules/2.6.11-rc3-mm1/kernel/drivers/md/dm-mod.ko): Device or resource busy
> 
>  The following line appears in dmesg :
> 
>  register_blkdev: failed to get major for device-mapper

You've enabled CONFIG_BASE_SMALL and so the major_names[] hashtable has
just one element.  device-mapper uses dynamic major allocation, the range
of which is limited to the size of the top-level major_names[] array.  You
ran out of slots and register_blkdev() failed.

So for now I guess we must drop base-small-shrink-major_names-hash.patch.

Al, that code looks rather crappy.  Shouldn't we be using an idr tree or
something?

Also, we can never generate a major number of zero if the caller passed in
major=0.  How come?


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/