]> git.baikalelectronics.ru Git - kernel.git/commit
rbd: switch to ida for rbd id assignments
authorIlya Dryomov <ilya.dryomov@inktank.com>
Fri, 13 Dec 2013 13:28:57 +0000 (15:28 +0200)
committerIlya Dryomov <ilya.dryomov@inktank.com>
Tue, 31 Dec 2013 18:31:56 +0000 (20:31 +0200)
commit12aa165d683f7b8df7e096a8abc2813fb5c1bff4
tree040d38a199ab4ad0e9814a4826e58f0f2725c374
parent6133b7c37e592b0d653d3bb0a31a6222f45f235e
rbd: switch to ida for rbd id assignments

Currently rbd ids are allocated using an atomic variable that keeps
track of the highest id currently in use and each new id is simply one
more than the value of that variable.  That's nice and cheap, but it
does mean that rbd ids are allowed to grow boundlessly, and, more
importantly, it's completely unpredictable.  So, in preparation for
single-major device number allocation scheme, which is going to
establish and rely on a constant mapping between rbd ids and device
numbers, switch to ida for rbd id assignments.

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
drivers/block/rbd.c