path: root/init
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authorTejun Heo <tj@kernel.org>2013-05-14 13:52:38 -0700
committerTejun Heo <tj@kernel.org>2013-05-14 13:52:38 -0700
commit9e660acffcd1b5adc4ec1ffba0cbb584f86b8907 (patch)
tree96ac75e374c9a7069e07093a1c636aebf76d8a3d /init
parent2a12f0dcdad1ba7c0e53bbff8e5f6d0ee7a29882 (diff)
blk-throttle: make blk_throtl_bio() ready for hierarchy
Currently, blk_throtl_bio() issues the passed in bio directly if it's within limits of its associated tg (throtl_grp). This behavior becomes incorrect with hierarchy support as the bio should be accounted to and throttled by the ancestor throtl_grps too. This patch makes the direct issue path of blk_throtl_bio() to loop until it reaches the top-level service_queue or gets throttled. If the former, the bio can be issued directly; otherwise, it gets queued at the first layer it was above limits. As tg->parent_sq is always the top-level service queue currently, this patch in itself doesn't make any behavior differences. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Vivek Goyal <vgoyal@redhat.com>
Diffstat (limited to 'init')
0 files changed, 0 insertions, 0 deletions