Re: [PATCH v5 0/4] Add support Weighted Round Robin for blkcg and nvme

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To: Weiping Zhang <zwp10758@xxxxxxxxx>
Subject: Re: [PATCH v5 0/4] Add support Weighted Round Robin for blkcg and nvme
From: Christoph Hellwig <hch@xxxxxx>
Date: Tue, 31 Mar 2020 18:33:37 +0200
Cc: Christoph Hellwig <hch@xxxxxx>, Tejun Heo <tj@xxxxxxxxxx>, Keith Busch <kbusch@xxxxxxxxxx>, Jens Axboe <axboe@xxxxxxxxx>, Bart Van Assche <bvanassche@xxxxxxx>, Minwoo Im <minwoo.im.dev@xxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Ming Lei <ming.lei@xxxxxxxxxx>, "Nadolski, Edmund" <edmund.nadolski@xxxxxxxxx>, linux-block@xxxxxxxxxxxxxxx, cgroups@xxxxxxxxxxxxxxx, linux-nvme@xxxxxxxxxxxxxxxxxxx
In-reply-to: <CAA70yB6PYH-W8-RRd7nxXOvpg6n+_-h_BLm6JA3EbLmsYG-ZSw@mail.gmail.com>
References: <cover.1580786525.git.zhangweiping@didiglobal.com> <20200204154200.GA5831@redsun51.ssa.fujisawa.hgst.com> <CAA70yB5qAj8YnNiPVD5zmPrrTr0A0F3v2cC6t2S1Fb0kiECLfw@mail.gmail.com> <CAA70yB62_6JD_8dJTGPjnjJfyJSa1xqiCVwwNYtsTCUXQR5uCA@mail.gmail.com> <20200331143635.GS162390@mtj.duckdns.org> <CAA70yB51=VQrL+2wC+DL8cYmGVACb2_w5UHc4XFn7MgZjUJaeg@mail.gmail.com> <20200331155139.GT162390@mtj.duckdns.org> <20200331155257.GA22994@lst.de> <CAA70yB6PYH-W8-RRd7nxXOvpg6n+_-h_BLm6JA3EbLmsYG-ZSw@mail.gmail.com>
User-agent: Mutt/1.5.17 (2007-11-01)

On Wed, Apr 01, 2020 at 12:31:17AM +0800, Weiping Zhang wrote:
> Would you like to share more detail about why NVMe WRR is broken?

Because it only weights command fetching.  It says absolutely nothing
about command execution.

Follow-Ups:
- Re: [PATCH v5 0/4] Add support Weighted Round Robin for blkcg and nvme
  - From: Weiping Zhang

References:
- [PATCH v5 0/4] Add support Weighted Round Robin for blkcg and nvme
  - From: Weiping Zhang
- Re: [PATCH v5 0/4] Add support Weighted Round Robin for blkcg and nvme
  - From: Keith Busch
- Re: [PATCH v5 0/4] Add support Weighted Round Robin for blkcg and nvme
  - From: Weiping Zhang
- Re: [PATCH v5 0/4] Add support Weighted Round Robin for blkcg and nvme
  - From: Weiping Zhang
- Re: [PATCH v5 0/4] Add support Weighted Round Robin for blkcg and nvme
  - From: Tejun Heo
- Re: [PATCH v5 0/4] Add support Weighted Round Robin for blkcg and nvme
  - From: Weiping Zhang
- Re: [PATCH v5 0/4] Add support Weighted Round Robin for blkcg and nvme
  - From: Tejun Heo
- Re: [PATCH v5 0/4] Add support Weighted Round Robin for blkcg and nvme
  - From: Christoph Hellwig
- Re: [PATCH v5 0/4] Add support Weighted Round Robin for blkcg and nvme
  - From: Weiping Zhang

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