From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 450B0C47083 for ; Wed, 2 Jun 2021 21:19:10 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id E68EE613E9 for ; Wed, 2 Jun 2021 21:19:09 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E68EE613E9 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Content-Type: Content-Transfer-Encoding:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date:Message-ID:From: References:Cc:To:Subject:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=C4L8Qano+vxkHU2b763IQphBhRqQD2xy1uvuSke4jNM=; b=uDVymsZ5NfLBNXpe8bGBRBtSaC Mio6chBMyT8b5zm7YFhQluDQYgX8h2KCVW5KrO94NwR8gvbJcfwYwYwgtTws4gIOOUBJNq1IXBU4p WkNR9z1BNrvyOHdRKEa8r7CelIoqwNyqQruA3Qg3y+7bMooaKkRJM1zcf73F0wsTbTzi8Mlh1Z0xg 3aDWmUjXssRynvN19Y8XGrH0SB42V/Oef4O0dptbLswiM8RK3I8m+gZ6YRmZQ8lFAL6Skr4pHS1Et 2wPZrIG9S4F4hQtFCF66Y14kI6fs0d9VrTRBC/H8uJmccPtctxTyoeJLuYB2HJFaBxt1dAaK79iqI OfBZbU1Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1loYGN-006Esg-Mb; Wed, 02 Jun 2021 21:18:55 +0000 Received: from m43-7.mailgun.net ([69.72.43.7]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1loYGK-006EsE-BH for linux-mediatek@lists.infradead.org; Wed, 02 Jun 2021 21:18:54 +0000 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1622668732; h=Content-Transfer-Encoding: Content-Type: In-Reply-To: MIME-Version: Date: Message-ID: From: References: Cc: To: Subject: Sender; bh=+CMCzWdXYW36gvLhqspzCb5O76RlF7D5cgvfnUD5vAs=; b=a0BW3C5HhAnd4sF3sAYpmYyYRuEvM8a+MAIJ8brvqE9P0Blkkr2xO0eQjzAkkI7H+zsOadjh 8/XcyFUQ+5HjgafRSI1/kun8SCpVY9L2x+8J9+yCWZsVRIuaFFxLtdKANMf445saUjebYbDI XMfEgiSHfMGnPmmy5dgZWKg+u90= X-Mailgun-Sending-Ip: 69.72.43.7 X-Mailgun-Sid: WyI0ZDIyMyIsICJsaW51eC1tZWRpYXRla0BsaXN0cy5pbmZyYWRlYWQub3JnIiwgImJlOWU0YSJd Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n02.prod.us-east-1.postgun.com with SMTP id 60b7f5b0e27c0cc77f7e5b05 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Wed, 02 Jun 2021 21:18:40 GMT Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 0F276C43145; Wed, 2 Jun 2021 21:18:39 +0000 (UTC) Received: from [192.168.8.168] (cpe-70-95-149-85.san.res.rr.com [70.95.149.85]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: asutoshd) by smtp.codeaurora.org (Postfix) with ESMTPSA id 1BD5CC433D3; Wed, 2 Jun 2021 21:18:38 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 1BD5CC433D3 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=fail smtp.mailfrom=asutoshd@codeaurora.org Subject: Re: [PATCH v1 2/3] scsi: ufs: Optimize host lock on transfer requests send/compl paths To: Avri Altman , Bart Van Assche , Can Guo , "nguyenb@codeaurora.org" , "hongwus@codeaurora.org" , "linux-scsi@vger.kernel.org" , "kernel-team@android.com" Cc: Stanley Chu , Alim Akhtar , "James E.J. Bottomley" , "Martin K. Petersen" , Matthias Brugger , Bean Huo , Jaegeuk Kim , Adrian Hunter , Kiwoong Kim , Satya Tangirala , open list , "moderated list:ARM/Mediatek SoC support" , "moderated list:ARM/Mediatek SoC support" References: <1621845419-14194-1-git-send-email-cang@codeaurora.org> <1621845419-14194-3-git-send-email-cang@codeaurora.org> <41a08b3e-122d-4f1a-abbd-4b5730f880b2@acm.org> From: "Asutosh Das (asd)" Message-ID: Date: Wed, 2 Jun 2021 14:18:37 -0700 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.10.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210602_141853_126706_2CB8C572 X-CRM114-Status: GOOD ( 16.37 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org On 5/28/2021 12:30 AM, Avri Altman wrote: >>> Hi Bart, >>> No it's not necessary to serialize both the paths. I think this series >>> attempts to remove this serialization to a certain degree, which is >>> what's giving the performance improvement. > Btw, Is this performance improvement is on top of rq_affinity 2 or 1? > It's on 1. > Thanks, > Avri > >>> >>> Even if multiqueue support would be available in the future, I think >>> this change is apt now for the current available specification. >> I agree - this looks like the harbinger of a major change, >> And going further with respect of hw queues, >> will need the spec support - e.g. doorbell per lane, etc. >> >> Thanks, >> Avri >> >>>> Thanks, >>>> >>>> Bart. >>>> >>> >>> >>> Thanks, >>> -asd >>> >>> -- >>> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora >>> Forum, >>> Linux Foundation Collaborative Project -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, Linux Foundation Collaborative Project _______________________________________________ Linux-mediatek mailing list Linux-mediatek@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-mediatek