linux-kernel - Re: [PATCH v6 0/5] scsi: ufs: Add Host Performance Booster Support

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Message-ID: <0e2aaef299235c224051b95793c5e89c3820b1eb.camel@gmail.com>
Date:   Thu, 16 Jul 2020 10:14:35 +0200
From:   Bean Huo <huobean@...il.com>
To:     Avi Shchislowski <Avi.Shchislowski@....com>,
        "daejun7.park@...sung.com" <daejun7.park@...sung.com>,
        Avri Altman <Avri.Altman@....com>,
        "jejb@...ux.ibm.com" <jejb@...ux.ibm.com>,
        "martin.petersen@...cle.com" <martin.petersen@...cle.com>,
        "asutoshd@...eaurora.org" <asutoshd@...eaurora.org>,
        "beanhuo@...ron.com" <beanhuo@...ron.com>,
        "stanley.chu@...iatek.com" <stanley.chu@...iatek.com>,
        "cang@...eaurora.org" <cang@...eaurora.org>,
        "bvanassche@....org" <bvanassche@....org>,
        "tomas.winkler@...el.com" <tomas.winkler@...el.com>,
        ALIM AKHTAR <alim.akhtar@...sung.com>
Cc:     "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Sang-yoon Oh <sangyoon.oh@...sung.com>,
        Sung-Jun Park <sungjun07.park@...sung.com>,
        yongmyung lee <ymhungry.lee@...sung.com>,
        Jinyoung CHOI <j-young.choi@...sung.com>,
        Adel Choi <adel.choi@...sung.com>,
        BoRam Shin <boram.shin@...sung.com>
Subject: Re: [PATCH v6 0/5] scsi: ufs: Add Host Performance Booster Support

On Wed, 2020-07-15 at 18:34 +0000, Avi Shchislowski wrote:
> Hello All,
> My name is Avi Shchislowski, I am managing the WDC's Linux Host R&D
> team in which Avri is a member of.
> As the review process of HPB is progressing very constructively, we
> are getting more and more requests from OEMs, Inquiring about HPB in
> general, and host control mode in particular.
> 
> Their main concern is that HPB will make it to 5.9 merge window, but
> the host control mode patches will not.
> Thus, because of recent Google's GKI, the next Android LTS might not
> include HPB with host control mode.
> 
> Aside of those requests, initial host control mode testing are
> showing promising prospective with respect of performance gain.
> 
> What would be, in your opinion, the best policy that host control
> mode is included in next Android LTS?
> 
> Thanks,
> Avi
> 

Hi Avi
IMO, no matter how did the driver implement, if you truly want the HPB
host mode driver you mentioned to be mainlined in the upstream Linux,
the best policy is that you should first post the driver in the SCSI
maillist community, let us firstly review here. I didn't see your
driver, I don't know how to provide the correct answer.

Thanks,
Bean