linux-kernel - Re: [PATCH V8 00/14] mmc: Add Command Queue support

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Date:   Tue, 24 Oct 2017 09:39:42 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Adrian Hunter <adrian.hunter@...el.com>
Cc:     linux-mmc <linux-mmc@...r.kernel.org>,
        linux-block <linux-block@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Bough Chen <haibo.chen@....com>,
        Alex Lemberg <alex.lemberg@...disk.com>,
        Mateusz Nowak <mateusz.nowak@...el.com>,
        Yuliy Izrailov <Yuliy.Izrailov@...disk.com>,
        Jaehoon Chung <jh80.chung@...sung.com>,
        Dong Aisheng <dongas86@...il.com>,
        Das Asutosh <asutoshd@...eaurora.org>,
        Zhangfei Gao <zhangfei.gao@...il.com>,
        Sahitya Tummala <stummala@...eaurora.org>,
        Harjani Ritesh <riteshh@...eaurora.org>,
        Venu Byravarasu <vbyravarasu@...dia.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Shawn Lin <shawn.lin@...k-chips.com>,
        Christoph Hellwig <hch@....de>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Subject: Re: [PATCH V8 00/14] mmc: Add Command Queue support

[...]

>> However, you have completely ignored mine, Linus and Bartlomiej's
>> comments about that we want the blkmq port being a separate patch(es)
>> and then make the CMDQ patches on top. This worries me, because it
>> seems like our messages don't reach you.
>
> Rubbish!  I gave a very good reason for keeping the CQE code in - it is
> designed to work together.  I also pointed out that it is trivial to see the
> CQE code and that it is all '+' lines anyway.

You gave reasons, but none of us bought them.

>
> But not one question in response!  Where is a single example of why it is
> difficult like it is.  Where are the questions!  Not even a request for
> documentation!  How I am supposed to know what you do or don't understand if
> you don't ask any questions! There is no evidence that you guys have read a
> single line!

I have and I have also tested it, finding it not working. As reported.

However, I have also told you that I am having a *hard time* to review
it, because it implements both blkmq and CMDQ in the same patch to
code changes get complex.

>
> So, what are your plans for the patches?  What don't you understand?

I have told you this several time, so has Linus and Bartlomiej.

If you can split it up such the blkmq support comes first, then I can
review/test and pick it up.

Kind regards
Uffe