RE: [PATCH v6 0/5] scsi: ufs: Add Host Performance Booster Support

[Avi Shchislowski <Avi.Shchislowski@wdc.com>]

Hi
Thanks to everyone for the clarifications

Thanks,
Avi
> -----Original Message-----
> From: Alim Akhtar <alim.akhtar@samsung.com>
> Sent: Thursday, July 16, 2020 7:45 PM
> To: Avi Shchislowski <Avi.Shchislowski@wdc.com>; 'Bart Van Assche'
> <bvanassche@acm.org>; daejun7.park@samsung.com; Avri Altman
> <Avri.Altman@wdc.com>; jejb@linux.ibm.com; martin.petersen@oracle.com;
> asutoshd@codeaurora.org; beanhuo@micron.com;
> stanley.chu@mediatek.com; cang@codeaurora.org; tomas.winkler@intel.com
> Cc: linux-scsi@vger.kernel.org; linux-kernel@vger.kernel.org; 'Sang-yoon Oh'
> <sangyoon.oh@samsung.com>; 'Sung-Jun Park'
> <sungjun07.park@samsung.com>; 'yongmyung lee'
> <ymhungry.lee@samsung.com>; 'Jinyoung CHOI' <j-
> young.choi@samsung.com>; 'Adel Choi' <adel.choi@samsung.com>; 'BoRam
> Shin' <boram.shin@samsung.com>
> Subject: RE: [PATCH v6 0/5] scsi: ufs: Add Host Performance Booster Support
> 
> CAUTION: This email originated from outside of Western Digital. Do not click on
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> 
> 
> Hi Avi,
> 
> > -----Original Message-----
> > From: Avi Shchislowski <Avi.Shchislowski@wdc.com>
> > Sent: 16 July 2020 15:31
> > To: Bart Van Assche <bvanassche@acm.org>; daejun7.park@samsung.com;
> > Avri Altman <Avri.Altman@wdc.com>; jejb@linux.ibm.com;
> > martin.petersen@oracle.com; asutoshd@codeaurora.org;
> > beanhuo@micron.com; stanley.chu@mediatek.com; cang@codeaurora.org;
> > tomas.winkler@intel.com; ALIM AKHTAR <alim.akhtar@samsung.com>
> > Cc: linux-scsi@vger.kernel.org; linux-kernel@vger.kernel.org;
> > Sang-yoon Oh <sangyoon.oh@samsung.com>; Sung-Jun Park
> > <sungjun07.park@samsung.com>; yongmyung lee
> > <ymhungry.lee@samsung.com>; Jinyoung CHOI <j-
> young.choi@samsung.com>;
> > Adel Choi <adel.choi@samsung.com>; BoRam Shin
> <boram.shin@samsung.com>
> > Subject: RE: [PATCH v6 0/5] scsi: ufs: Add Host Performance Booster
> > Support
> >
> >
> >
> > > -----Original Message-----
> > > From: Bart Van Assche <bvanassche@acm.org>
> > > Sent: Thursday, July 16, 2020 4:42 AM
> > > To: Avi Shchislowski <Avi.Shchislowski@wdc.com>;
> > > daejun7.park@samsung.com; Avri Altman <Avri.Altman@wdc.com>;
> > > jejb@linux.ibm.com; martin.petersen@oracle.com;
> > > asutoshd@codeaurora.org; beanhuo@micron.com;
> > stanley.chu@mediatek.com;
> > > cang@codeaurora.org; tomas.winkler@intel.com; ALIM AKHTAR
> > > <alim.akhtar@samsung.com>
> > > Cc: linux-scsi@vger.kernel.org; linux-kernel@vger.kernel.org;
> > > Sang-yoon Oh <sangyoon.oh@samsung.com>; Sung-Jun Park
> > > <sungjun07.park@samsung.com>; yongmyung lee
> > > <ymhungry.lee@samsung.com>; Jinyoung CHOI <j-
> > young.choi@samsung.com>;
> > > Adel Choi <adel.choi@samsung.com>; BoRam Shin
> > <boram.shin@samsung.com>
> > > Subject: Re: [PATCH v6 0/5] scsi: ufs: Add Host Performance Booster
> > > Support
> > >
> > > CAUTION: This email originated from outside of Western Digital. Do
> > > not click on links or open attachments unless you recognize the
> > > sender and know that the content is safe.
> > >
> > >
> > > On 2020-07-15 11:34, Avi Shchislowski wrote:
> > > > 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?
> > >
> > > Hi Avi,
> > >
> > > Are you perhaps referring to the HPB patch series that has already
> > > been
> > posted?
> > > Although I'm not sure of this, I think that the SCSI maintainer
> > > expects more
> > > Reviewed-by: and Tested-by: tags. Has anyone from WDC already taken
> > > the time to review and/or test this patch series?
> > >
> > > Thanks,
> > >
> > > Bart.
> >
> > Yes, I am referring to the current proposal which I am replying to:
> > [PATCH v6 0/5] scsi: ufs: Add Host Performance Booster Support This
> > proposal does not contains host mode, hence our customers concern.
> > What would be, in your opinion, the best policy that host control mode
> > is included in next Android LTS  assuming it will be based on kernel v5.9 ?
> >
> This series has nothing to do with Host mode control, this series is targeted for
> device mode control. General consensus here is to land this series as it is (unless
> someone has more review comments) and lets add/enhance whatever need to
> be done for adding Host mode controls as well as other HPB2.0 related changes.
> 
> > Thanks,
> > Avi