[BUGFIX,IMPROVEMENT,V2,0/7] boost throughput with synced I/O, reduce latency and fix a bandwidth bug

Message

Paolo Valente June 25, 2019, 5:12 a.m. UTC

[SAME AS V1, APART FROM SRIVATSA ADDED AS REPORTER]

Hi Jens,
this series, based against for-5.3/block, contains:
1) The improvements to recover the throughput loss reported by
   Srivatsa [1] (first five patches)
2) A preemption improvement to reduce I/O latency
3) A fix of a subtle bug causing loss of control over I/O bandwidths

Thanks,
Paolo

[1] https://lkml.org/lkml/2019/5/17/755

Paolo Valente (7):
  block, bfq: reset inject limit when think-time state changes
  block, bfq: fix rq_in_driver check in bfq_update_inject_limit
  block, bfq: update base request service times when possible
  block, bfq: bring forward seek&think time update
  block, bfq: detect wakers and unconditionally inject their I/O
  block, bfq: preempt lower-weight or lower-priority queues
  block, bfq: re-schedule empty queues if they deserve I/O plugging

 block/bfq-iosched.c | 952 ++++++++++++++++++++++++++++++--------------
 block/bfq-iosched.h |  25 +-
 2 files changed, 686 insertions(+), 291 deletions(-)

--
2.20.1

Comments

Jens Axboe June 25, 2019, 3:35 p.m. UTC | #1

On 6/24/19 11:12 PM, Paolo Valente wrote:
> [SAME AS V1, APART FROM SRIVATSA ADDED AS REPORTER]
> 
> Hi Jens,
> this series, based against for-5.3/block, contains:
> 1) The improvements to recover the throughput loss reported by
>     Srivatsa [1] (first five patches)
> 2) A preemption improvement to reduce I/O latency
> 3) A fix of a subtle bug causing loss of control over I/O bandwidths

Applied for 5.3, thanks.