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a=ed25519-sha256; c=relaxed/relaxed; t=1790933056; s=strato-dkim-0003; d=iokpp.de; h=References:In-Reply-To:Date:Cc:To:From:Subject:Message-ID:Cc:Date: From:Subject:Sender; bh=OGsyA19scA0QsAjlL/scH+RGq/86dQMb9SXx//eF9rU=; b=LxDKS+1VS/8IehST8lNcUPhCRaCvJjqRV86M9Nwjc8kUPxwCdrLG3FpWA+37DSMA7f MWfuCIZlrv/hQnfG82AQ== X-RZG-AUTH: ":LmkFe0i9dN8c2t4QQyGBB/NDXvjDB6pBSe9tgBDSDt0V0DBslXBtZUxPOub3IZqk" Received: from [10.176.237.249] by smtp.strato.de (RZmta 55.6.2 AUTH) with ESMTPSA id z04e1c2929OGHSX (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits)) (Client did not present a certificate); Fri, 2 Oct 2026 11:24:16 +0200 (CEST) Message-ID: <8ab9b08e12bf60e89a60a86137a23e9164e43839.camel@iokpp.de> Subject: Re: [PATCH v2 0/2] scsi: ufs: batch device-init reads with UFS 5.0 aggregated read From: Bean Huo To: hyenc.jeong@samsung.com, "James.Bottomley@HansenPartnership.com" , "mkp@kernel.org" , "avri.altman@sandisk.com" , "bvanassche@acm.org" , "peter.wang@mediatek.com" , "linux-scsi@vger.kernel.org" Cc: Jinyoung Choi , Alim Akhtar , "beanhuo@micron.com" , "can.guo@oss.qualcomm.com" , "linux-kernel@vger.kernel.org" Date: Fri, 02 Oct 2026 11:24:15 +0200 In-Reply-To: <1860250540.01790747102385.JavaMail.epsvc@epcpadp1new> References: <1860250540.01790747102385.JavaMail.epsvc@epcpadp1new> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.44.4-0ubuntu2.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Wed, 2026-09-30 at 14:02 +0900, Hyeoncheol Jeong wrote: > No functional change for pre-5.0 devices. >=20 > Motivation: on a Qualcomm SM8850 platform with a Samsung UFS 5.0 device, > timing raw UPIU queries over BSG (100 iterations) shows that replacing th= e > 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%). Hi Jeong, I don't know if you have plan to enable this feature in UEFI or any bootloa= ders to eliminate the boot overhead becaused of query iterations. Kind regards,=20 Bean