Re: [patch for playing] Patch to support 4000 disks and maintain backward compatibility

[Badari Pulavarty <pbadari@us.ibm.com>]

On Thursday 10 April 2003 04:33 pm, Andries.Brouwer@cwi.nl wrote:
>     From: Badari Pulavarty <pbadari@us.ibm.com>
>
>     > Then we don't know which disks have disappeared. Pity.
>     > If the number space is infinite then
>     >    index = next_index++;
>     > gives a new number each time we need one.
>
>     Yes !! I agree. I am not worried about running out them.
>     I am more worried about names slipping. I atleast hope
>     to see device names not changing by just doing
>     rmmod/insmod.
>
> But you see, the present sd_index_bits[] gives no such
> guarantee. In sd_detach a bit is cleared, in sd_attach
> the first free bit is given out. There is no memory.

But the disks are probed in the same manner as last time
(if the disks/controllers are not moved, crashed etc..). 
So we will end up getting same names.

Ofcourse, we need a device naming solution to fix
this for real.

Thanks,
Badari