block, bfq: split bfq-iosched.c into multiple source files

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The BFQ I/O scheduler features an optimal fair-queuing
(proportional-share) scheduling algorithm, enriched with several
mechanisms to boost throughput and reduce latency for interactive and
real-time applications. This makes BFQ a large and complex piece of
code. This commit addresses this issue by splitting BFQ into three
main, independent components, and by moving each component into a
separate source file:
1. Main algorithm: handles the interaction with the kernel, and
decides which requests to dispatch; it uses the following two further
components to achieve its goals.
2. Scheduling engine (Hierarchical B-WF2Q+ scheduling algorithm):
computes the schedule, using weights and budgets provided by the above
component.
3. cgroups support: handles group operations (creation, destruction,
move, ...).

Signed-off-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: Jens Axboe <axboe@fb.com>

...

This commit is contained in:

Paolo Valente 2017-04-19 08:48:24 -06:00 • committed by Jens Axboe

parent 6fa3e8d342

commit ea25da4808

5 changed files with 3869 additions and 3756 deletions

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3

block/Makefile

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1139

block/bfq-cgroup.c

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3663

block/bfq-iosched.c

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942

block/bfq-iosched.h

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1616

block/bfq-wf2q.c

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