From patchwork Tue May 9 06:52:30 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?RWQgVHNhaSAo6JSh5a6X6LuSKQ==?= X-Patchwork-Id: 13235386 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7C4CAC7EE2E for ; Tue, 9 May 2023 06:53:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235087AbjEIGxL (ORCPT ); Tue, 9 May 2023 02:53:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54700 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235068AbjEIGws (ORCPT ); Tue, 9 May 2023 02:52:48 -0400 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4A78E49F5; Mon, 8 May 2023 23:52:46 -0700 (PDT) X-UUID: 16d91f6eee3611edb20a276fd37b9834-20230509 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=TmJURkv7pbAHTEbnTOyNE3fGHfegLQvP/MIIY3flVJM=; b=kUS6TaLzLYv8M+UHcTz5DkzpA2ogXcOS5em6uYemIl2r5zYuklhlER6kZVUFt7AlmZGTjbRqwGx6rSVisFrlf1TA9aQySl1Q8BaZ/P316E0Iex0eiz+QzyrKL5jessvm7IhjJ3eW6NOCgKRSWZnEfna3noySCWuULBsbVppTxr8=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.23,REQID:623d23ad-f6ee-4b62-8f02-966255298c67,IP:0,U RL:0,TC:0,Content:-5,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION :release,TS:-5 X-CID-META: VersionHash:697ab71,CLOUDID:5a153dc0-e32c-4c97-918d-fbb3fc224d4e,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:-3,IP:nil,U RL:0,File:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA:0,AV:0 X-CID-BVR: 0,NGT X-CID-BAS: 0,NGT,0,_ X-UUID: 16d91f6eee3611edb20a276fd37b9834-20230509 Received: from mtkmbs13n2.mediatek.inc [(172.21.101.108)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 213924394; Tue, 09 May 2023 14:52:39 +0800 Received: from mtkmbs13n2.mediatek.inc (172.21.101.108) by mtkmbs10n2.mediatek.inc (172.21.101.183) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Tue, 9 May 2023 14:52:39 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkmbs13n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Tue, 9 May 2023 14:52:39 +0800 From: Ed Tsai To: CC: , , , , , , , , , , , , Ed Tsai Subject: [PATCH 2/2] ufs: don't use the fair tag sharings Date: Tue, 9 May 2023 14:52:30 +0800 Message-ID: <20230509065230.32552-3-ed.tsai@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20230509065230.32552-1-ed.tsai@mediatek.com> References: <20230509065230.32552-1-ed.tsai@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org The tags allocation is limited by the fair sharing algorithm. It hurts the performance for UFS devices, because the queue depth of general I/O is reduced by half once the UFS send a control command. Signed-off-by: Ed Tsai --- drivers/ufs/core/ufshcd.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c index 17d7bb875fee..e96a50265285 100644 --- a/drivers/ufs/core/ufshcd.c +++ b/drivers/ufs/core/ufshcd.c @@ -5149,6 +5149,9 @@ static int ufshcd_slave_configure(struct scsi_device *sdev) blk_queue_update_dma_pad(q, PRDT_DATA_BYTE_COUNT_PAD - 1); if (hba->quirks & UFSHCD_QUIRK_4KB_DMA_ALIGNMENT) blk_queue_update_dma_alignment(q, 4096 - 1); + + blk_queue_flag_clear(QUEUE_FLAG_FAIR_TAG_SHARING, q); + /* * Block runtime-pm until all consumers are added. * Refer ufshcd_setup_links().