From: Hyeoncheol Jeong <hyenc.jeong@samsung.com>
To: Bean Huo <beanhuo@iokpp.de>,
"James.Bottomley@HansenPartnership.com"
<James.Bottomley@HansenPartnership.com>,
"mkp@kernel.org" <mkp@kernel.org>,
"avri.altman@sandisk.com" <avri.altman@sandisk.com>,
"bvanassche@acm.org" <bvanassche@acm.org>,
"peter.wang@mediatek.com" <peter.wang@mediatek.com>,
"linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>
Cc: Jinyoung Choi <j-young.choi@samsung.com>,
Alim Akhtar <alim.akhtar@samsung.com>,
"beanhuo@micron.com" <beanhuo@micron.com>,
"can.guo@oss.qualcomm.com" <can.guo@oss.qualcomm.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2 0/2] scsi: ufs: batch device-init reads with UFS 5.0 aggregated read
Date: Tue, 06 Oct 2026 16:17:53 +0900 [thread overview]
Message-ID: <973576304.21791274502988.JavaMail.epsvc@epcpadp1new> (raw)
In-Reply-To: <8ab9b08e12bf60e89a60a86137a23e9164e43839.camel@iokpp.de>
Hi Bean,
On Fri, 2 Oct 2026 11:24:15 +0200, Bean Huo wrote:
> On Wed, 2026-09-30 at 14:02 +0900, Hyeoncheol Jeong wrote:
> > Motivation: on a Qualcomm SM8850 platform with a Samsung UFS 5.0 device,
> > timing raw UPIU queries over BSG (100 iterations) shows that replacing the
> > device-init read burst with a single aggregated read reduces the query
> > time by 75-78% (min 75.3%, avg 76.4%, max 78.5%).
>
> I don't know if you have plan to enable this feature in UEFI or any bootloaders
> to eliminate the boot overhead becaused of query iterations.
For now, my focus is on the kernel side. I do plan to bring the same
approach to bootloaders such as EDK II as a follow-up.
Thanks,
Hyeoncheol
next prev parent reply other threads:[~2026-10-06 8:15 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20260930050201epcms2p13ab67182445b0555acc8d27b927cda86@epcms2p1>
2026-09-30 5:02 ` [PATCH v2 0/2] scsi: ufs: batch device-init reads with UFS 5.0 aggregated read Hyeoncheol Jeong
2026-10-02 9:24 ` Bean Huo
2026-10-06 7:17 ` Hyeoncheol Jeong [this message]
[not found] <CGME20260930050201epcms2p13ab67182445b0555acc8d27b927cda86@epcms2p7>
[not found] ` <20260930050201epcms2p13ab67182445b0555acc8d27b927cda86@epcms2p1>
2026-09-30 5:15 ` [PATCH v2 1/2] scsi: ufs: Add the aggregated read query opcode and its reply format Hyeoncheol Jeong
2026-09-30 7:54 ` Peter Wang
2026-09-30 5:18 ` [PATCH v2 2/2] scsi: ufs: Serve the device init reads from one aggregated read Hyeoncheol Jeong
2026-09-30 7:28 ` sashiko-bot
2026-09-30 7:55 ` Peter Wang
2026-10-01 5:53 ` Stanley Jhu
2026-10-02 5:11 ` Hyeoncheol Jeong
2026-10-02 15:50 ` Bean Huo
2026-10-06 8:01 ` Hyeoncheol Jeong
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