diff options
| author | Tejun Heo <tj@kernel.org> | 2013-05-14 13:52:38 -0700 |
|---|---|---|
| committer | Moyster <oysterized@gmail.com> | 2016-09-18 12:46:24 +0200 |
| commit | f66dc56ad6f26d1ca2fdf904bde2774f767df0ca (patch) | |
| tree | 146b1a3fb20e132b6cb1e4158daaf71472804857 /include/linux/moduleparam.h | |
| parent | 04ae802fe2cb35c04c28d14584448468acdc478b (diff) | |
blk-throttle: make tg_dispatch_one_bio() ready for hierarchy
tg_dispatch_one_bio() currently assumes that the parent_sq is the top
level one and the bio being dispatched is ready to be issued; however,
this assumption will be wrong with proper hierarchy support. This
patch makes the following changes to make tg_dispatch_on_bio() ready
for hiearchy.
* throtl_data->nr_queued[] is incremented in blk_throtl_bio() instead
of throtl_add_bio_tg() so that throtl_add_bio_tg() can be used to
transfer a bio from a child tg to its parent.
* tg_dispatch_one_bio() is updated to distinguish whether its parent
is another throtl_grp or the throtl_data. If former, the bio is
transferred to the parent throtl_grp using throtl_add_bio_tg(). If
latter, the bio is ready to be issued and put on the top-level
service_queue's bio_lists[] and throtl_data->nr_queued is
decremented.
As all throtl_grps currently have the top level service_queue as their
->parent_sq, this patch in itself doesn't make any behavior
difference.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Diffstat (limited to 'include/linux/moduleparam.h')
0 files changed, 0 insertions, 0 deletions