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(parent: 00410f1) | patch
blk-iocost: clamp inuse and skip noops in __propagate_weights()
authorTejun Heo <tj@kernel.org>
Tue, 1 Sep 2020 18:52:35 +0000 (14:52 -0400)
committerJens Axboe <axboe@kernel.dk>
Wed, 2 Sep 2020 01:38:31 +0000 (19:38 -0600)
commitdb84a72af6be422abf2089a5896293590dda5066
tree015107e8a4c471aa1fd872043d096ea39c835617tree | snapshot
parent00410f1b09fe7c9a12bde07f0bb4b978a3367f3acommit | diff
blk-iocost: clamp inuse and skip noops in __propagate_weights()

__propagate_weights() currently expects the callers to clamp inuse within
[1, active], which is needlessly fragile. The inuse adjustment logic is
going to be revamped, in preparation, let's make __propagate_weights() clamp
inuse on entry.

Also, make it avoid weight updates altogether if neither active or inuse is
changed.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
block/blk-iocost.c diff | blob | history
Domain: System / Kernel;