linux-kernel - Re: [PATCH BUGFIX IMPROVEMENT 0/7] boost throughput with synced I/O, reduce latency and fix a bandwidth bug

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Message-ID: <f3e2d759-911b-f593-9ec5-b6b7a94df71c@csail.mit.edu>
Date:   Mon, 24 Jun 2019 13:15:31 -0700
From:   "Srivatsa S. Bhat" <srivatsa@...il.mit.edu>
To:     Paolo Valente <paolo.valente@...aro.org>,
        Jens Axboe <axboe@...nel.dk>
Cc:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        ulf.hansson@...aro.org, linus.walleij@...aro.org,
        bfq-iosched@...glegroups.com, oleksandr@...alenko.name,
        bottura.nicola95@...il.com
Subject: Re: [PATCH BUGFIX IMPROVEMENT 0/7] boost throughput with synced I/O,
 reduce latency and fix a bandwidth bug

On 6/24/19 12:40 PM, Paolo Valente wrote:
> 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 a lot for these patches, Paolo!

Would you mind adding:

Reported-by: Srivatsa S. Bhat (VMware) <srivatsa@...il.mit.edu>
Tested-by: Srivatsa S. Bhat (VMware) <srivatsa@...il.mit.edu>

to the first 5 patches, as appropriate?

Thank you!

> 
> [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(-)
> 

Regards,
Srivatsa
VMware Photon OS