From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailout2.samsung.com (mailout2.samsung.com [203.254.224.25]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D496A3D6CB0 for ; Tue, 6 Oct 2026 08:15:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=203.254.224.25 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791274508; cv=none; b=uuzNwAFwPmUh4K2+cuMXsUGr6bLcK2lzauzCep5yb7HsajzqHw56E/lD6fKBVU9BvvunAjvuyrhwUmNb4SAMJXvBlg+jqeZ5mqSR6My3YCoqee6F94jrqhErNcL3wNIvk/WaRimazSQJ3gpcrjIeG51xMzI6UXK2w3LK2ZU/5+A= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791274508; c=relaxed/simple; bh=8NrzkBe6sqvhfd9Mx3JXlRNrAO1yoEalp0MCIoNGIZU=; h=Mime-Version:Subject:From:To:CC:In-Reply-To:Message-ID:Date: Content-Type:References; b=ZNWey+Jz/HBz9HFVLwZrM01IvH+/GicutiBOKjrMuVOQzs/PASfZAVpcz7ozrPJMW70J+eUPA2KJt1CwCI04I+a15g/YPa+fqlIONdppvL6BFKwJRuAb+KL9TQUgxtFyhRBeLpVM9fEg1dZm/9dFB3NiEkGFPJEtH+k7t4QxGOA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=samsung.com; spf=pass smtp.mailfrom=samsung.com; dkim=pass (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b=Eub3SbtH; arc=none smtp.client-ip=203.254.224.25 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=samsung.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=samsung.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b="Eub3SbtH" Received: from epcas2p4.samsung.com (unknown [182.195.41.56]) by mailout2.samsung.com (KnoxPortal) with ESMTP id 20261006081503epoutp0200296f3391c61bb3deb6d682e0382995~b4quf8IHY0192801928epoutp02Q for ; Tue, 6 Oct 2026 08:15:03 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout2.samsung.com 20261006081503epoutp0200296f3391c61bb3deb6d682e0382995~b4quf8IHY0192801928epoutp02Q DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1791274503; bh=8NrzkBe6sqvhfd9Mx3JXlRNrAO1yoEalp0MCIoNGIZU=; h=Subject:Reply-To:From:To:CC:In-Reply-To:Date:References:From; b=Eub3SbtH7DGuDR/EkVV9Crt4aUYGVyl89TJSIzpwgKQ+BUxGkR0r0F+bwlkpNlIyQ Z/s0xHWVO/QpLA8Dpy5+DJinrU5nntD6PSfYLzJE0LHV4nu0PX26DCCWh6+ByMRtvG d/y4GY+eqG4VG2rGpVSs5AvjMulkQIY4/QKqlKUQ= Received: from epsnrtp03.localdomain (unknown [182.195.42.155]) by epcas2p3.samsung.com (KnoxPortal) with ESMTPS id 20261006081503epcas2p3201f08debd4f5dadeb92105a16bcab7b~b4quA2Hgu2397323973epcas2p39; Tue, 6 Oct 2026 08:15:03 +0000 (GMT) Received: from epcpadp1new (unknown [182.195.40.141]) by epsnrtp03.localdomain (Postfix) with ESMTP id 4hzTZb01Ljz3hhTL; Tue, 6 Oct 2026 08:15:03 +0000 (GMT) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Subject: Re: [PATCH v2 0/2] scsi: ufs: batch device-init reads with UFS 5.0 aggregated read Reply-To: hyenc.jeong@samsung.com Sender: Hyeoncheol Jeong From: Hyeoncheol Jeong To: Bean Huo , "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" X-Priority: 3 X-Content-Kind-Code: NORMAL In-Reply-To: <8ab9b08e12bf60e89a60a86137a23e9164e43839.camel@iokpp.de> X-CPGS-Detection: blocking_info_exchange X-Drm-Type: N,general X-Msg-Generator: Mail X-Msg-Type: PERSONAL X-Reply-Demand: N Message-ID: <973576304.21791274502988.JavaMail.epsvc@epcpadp1new> Date: Tue, 06 Oct 2026 16:17:53 +0900 X-CMS-MailID: 20261006071753epcms2p8553acc780be5126e830594fb1af5de4b Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="utf-8" X-Sendblock-Type: AUTO_CONFIDENTIAL CMS-TYPE: 102P X-CPGSPASS: Y X-CPGSPASS: Y X-Hop-Count: 3 X-CMS-RootMailID: 20260930050201epcms2p13ab67182445b0555acc8d27b927cda86 References: <8ab9b08e12bf60e89a60a86137a23e9164e43839.camel@iokpp.de> <1860250540.01790747102385.JavaMail.epsvc@epcpadp1new> 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