From: Bjorn Andersson <bjorn.andersson@linaro.org>
To: Avri Altman <Avri.Altman@wdc.com>
Cc: Rob Clark <robdclark@gmail.com>,
Asutosh Das <asutoshd@codeaurora.org>,
"cang@codeaurora.org" <cang@codeaurora.org>,
"martin.petersen@oracle.com" <martin.petersen@oracle.com>,
"linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>,
linux-arm-msm <linux-arm-msm@vger.kernel.org>,
Subhash Jadavani <subhashj@codeaurora.org>,
Alim Akhtar <alim.akhtar@samsung.com>,
"James E.J. Bottomley" <jejb@linux.ibm.com>,
Bean Huo <beanhuo@micron.com>,
Stanley Chu <stanley.chu@mediatek.com>,
Tomas Winkler <tomas.winkler@intel.com>,
Colin Ian King <colin.king@canonical.com>,
Bart Van Assche <bvanassche@acm.org>,
open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v1 1/3] scsi: ufs: add write booster feature support
Date: Sun, 21 Jun 2020 00:55:39 -0700 [thread overview]
Message-ID: <20200621075539.GK128451@builder.lan> (raw)
In-Reply-To: <SN6PR04MB46402FD7981F9FCA2111AB37FC960@SN6PR04MB4640.namprd04.prod.outlook.com>
On Sun 21 Jun 00:40 PDT 2020, Avri Altman wrote:
>
> >
> > On Wed, Apr 8, 2020 at 3:00 PM Asutosh Das <asutoshd@codeaurora.org>
> > wrote:
> > >
> > > The write performance of TLC NAND is considerably
> > > lower than SLC NAND. Using SLC NAND as a WriteBooster
> > > Buffer enables the write request to be processed with
> > > lower latency and improves the overall write performance.
> > >
> > > Adds support for shared-buffer mode WriteBooster.
> > >
> > > WriteBooster enable: SW enables it when clocks are
> > > scaled up, thus it's enabled only in high load conditions.
> > >
> > > WriteBooster disable: SW will disable the feature,
> > > when clocks are scaled down. Thus writes would go as normal
> > > writes.
> >
> > btw, in v5.8-rc1 (plus handful of remaining patches for lenovo c630
> > laptop (sdm850)), I'm seeing a lot of:
> >
> > ufshcd-qcom 1d84000.ufshc: ufshcd_query_flag: Sending flag query for
> > idn 14 failed, err = 253
> > ufshcd-qcom 1d84000.ufshc: ufshcd_query_flag: Sending flag query for
> > idn 14 failed, err = 253
> > ufshcd-qcom 1d84000.ufshc: ufshcd_query_flag_retry: query attribute,
> > opcode 6, idn 14, failed with error 253 after 3 retires
> > ufshcd-qcom 1d84000.ufshc: ufshcd_wb_ctrl write booster enable failed 253
> >
> > and at least subjectively, compiling mesa seems slower, which seems
> > like it might be related?
> This looks like a device issue to be taken with the flash vendor:
There's no way for a end-user to file a bug report with the flash vendor
on a device bought from an OEM and even if they would accept the bug
report they wouldn't re-provision the flash in an shipped device.
So you will have to work around this in the driver.
Regards,
Bjorn
> The device reports that it supports wd, but returns inalid idn for flag 0xe...
>
> Thanks,
> Avri
next prev parent reply other threads:[~2020-06-21 7:58 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <cover.1586374414.git.asutoshd@codeaurora.org>
2020-04-08 21:48 ` [PATCH v1 1/3] scsi: ufs: add write booster feature support Asutosh Das
2020-04-08 21:48 ` [PATCH v1 2/3] ufs-qcom: scsi: configure write booster type Asutosh Das
2020-04-08 21:48 ` [PATCH v1 3/3] ufs: sysfs: add sysfs entries for write booster Asutosh Das
2020-04-12 12:43 ` [PATCH v1 1/3] scsi: ufs: add write booster feature support Avri Altman
2020-04-21 20:01 ` Asutosh Das (asd)
2020-06-20 21:13 ` Rob Clark
2020-06-21 7:40 ` Avri Altman
2020-06-21 7:55 ` Bjorn Andersson [this message]
2020-06-21 16:50 ` Rob Clark
2020-06-21 17:50 ` Steev Klimaszewski
2020-06-23 4:34 ` Kyuho Choi
2020-06-23 6:09 ` Avri Altman
2020-06-23 6:51 ` Kyuho Choi
2020-06-24 1:10 ` Steev Klimaszewski
2020-06-24 1:53 ` Stanley Chu
2020-06-24 2:06 ` Kyuho Choi
2020-06-24 2:49 ` Stanley Chu
2020-06-24 16:15 ` Steev Klimaszewski
2020-06-25 3:29 ` Stanley Chu
2020-06-24 1:54 ` Kyuho Choi
2020-04-21 22:54 ` [PATCH v2 " Asutosh Das
2020-04-21 22:54 ` [PATCH v2 2/3] ufs: sysfs: add sysfs entries for write booster Asutosh Das
2020-04-22 8:49 ` Avri Altman
2020-04-21 22:54 ` [PATCH v2 3/3] ufs-qcom: scsi: configure write booster type Asutosh Das
2020-04-22 8:51 ` Avri Altman
2020-04-22 10:28 ` [PATCH v2 1/3] scsi: ufs: add write booster feature support Avri Altman
2020-04-22 10:35 ` Avri Altman
2020-04-22 21:41 ` [PATCH v3 " Asutosh Das
2020-04-22 21:41 ` [PATCH v3 2/3] ufs: sysfs: add sysfs entries for write booster Asutosh Das
2020-04-22 21:41 ` [PATCH v3 3/3] ufs-qcom: scsi: configure write booster type Asutosh Das
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