Joe Thornber wrote:
On Tue, Jan 20, 2004 at 08:32:44PM +0100, Christophe Saout wrote:
To use blk_queue_stack_limits dm would have to associate a request queue
with a table and swap it around too. I don't know if this is possible.
dm doesn't use most of the fields in the request_queue struct.
This would be the wrong thing.
Right having the queue in the table would not work.
In the constructor the target calls dm_get_device on it's devices and
combines the io restrictions for them. Then dm_table_add_target calls
combine_restrictions_low to combine the newly added targets restrictions.
So, it looked like instead of combining the restrictions when you build
the table you could defer it until you bind. dm_table_set_restrictions
could just loop through its list of devices combining all the
restrictions then.
Mike
