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| author | Tejun Heo <tj@kernel.org> | 2013-05-14 22:52:38 +0200 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2013-05-14 22:52:38 +0200 |
| commit | 9e660acffcd1b5adc4ec1ffba0cbb584f86b8907 (patch) | |
| tree | 96ac75e374c9a7069e07093a1c636aebf76d8a3d /ipc | |
| parent | blk-throttle: make blk_throtl_drain() ready for hierarchy (diff) | |
| download | linux-9e660acffcd1b5adc4ec1ffba0cbb584f86b8907.tar.xz linux-9e660acffcd1b5adc4ec1ffba0cbb584f86b8907.zip | |
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 'ipc')
0 files changed, 0 insertions, 0 deletions