From patchwork Thu Jun 25 07:43:30 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Song Bao Hua (Barry Song)" X-Patchwork-Id: 11624723 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 00EDD138C for ; Thu, 25 Jun 2020 07:47:48 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 C968120675 for ; Thu, 25 Jun 2020 07:47:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="kDX06ol6" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C968120675 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=hisilicon.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-ID:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=2A3e6I9RMz2alaTu+rdBKXlYpzhIi8bFjZxwSufv6fk=; b=kDX06ol68U0ebxN4P3gjaUxTu Yyb78npjj0mtQlM26OVwk5wRLvtgPu4zHURP798xgKZhtmENniFJWKCqFmOPUMd6V42FEtbOTAK9z h8OMdWb8W8s06MJRrhivYB3yF5IcfU1I0DknofcAQuvLp0Nnlxd/nsArnZz3HLpC3JYBtA5ZEJ7Pu UkMBL5uLlmi0EIxRraYAlEZg9rKVBi9ifcq1N2a+3Op/7+p1qU2DPTQJ2h6vsYNkKLXQxnobotUpx TP2fUTYrgIW/iwPiSUEjcsTUTQOy9CB3S5EANPtSKTRgq3aVxV4sR8lyrE40RW90ct1aKHxxXKZcy m9fRM0d+Q==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1joMZy-0005n2-UG; Thu, 25 Jun 2020 07:45:50 +0000 Received: from szxga05-in.huawei.com ([45.249.212.191] helo=huawei.com) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1joMZl-0005he-IQ for linux-arm-kernel@lists.infradead.org; Thu, 25 Jun 2020 07:45:39 +0000 Received: from DGGEMS410-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id CC418F2672C0FCA43C08; Thu, 25 Jun 2020 15:45:33 +0800 (CST) Received: from SWX921481.china.huawei.com (10.126.203.118) by DGGEMS410-HUB.china.huawei.com (10.3.19.210) with Microsoft SMTP Server id 14.3.487.0; Thu, 25 Jun 2020 15:45:23 +0800 From: Barry Song To: , , , , , Subject: [PATCH v2 2/2] arm64: mm: reserve per-numa CMA after numa_init Date: Thu, 25 Jun 2020 19:43:30 +1200 Message-ID: <20200625074330.13668-3-song.bao.hua@hisilicon.com> X-Mailer: git-send-email 2.21.0.windows.1 In-Reply-To: <20200625074330.13668-1-song.bao.hua@hisilicon.com> References: <20200625074330.13668-1-song.bao.hua@hisilicon.com> MIME-Version: 1.0 X-Originating-IP: [10.126.203.118] X-CFilter-Loop: Reflected X-Spam-Note: CRM114 invocation failed X-Spam-Score: -2.3 (--) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (-2.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [45.249.212.191 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record -0.0 SPF_HELO_PASS SPF: HELO matches SPF record 0.0 RCVD_IN_MSPIKE_H4 RBL: Very Good reputation (+4) [45.249.212.191 listed in wl.mailspike.net] 0.0 RCVD_IN_MSPIKE_WL Mailspike good senders X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Barry Song , Steve Capper , linuxarm@huawei.com, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, linux-arm-kernel@lists.infradead.org, Andrew Morton , Mike Rapoport , Nicolas Saenz Julienne Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Right now, smmu is using dma_alloc_coherent() to get memory to save queues and tables. Typically, on ARM64 server, there is a default CMA located at node0, which could be far away from node2, node3 etc. with this patch, smmu will get memory from local numa node to save command queues and page tables. that means dma_unmap latency will be shrunk much. Meanwhile, when iommu.passthrough is on, device drivers which call dma_ alloc_coherent() will also get local memory and avoid the travel between numa nodes. Cc: Christoph Hellwig Cc: Marek Szyprowski Cc: Will Deacon Cc: Robin Murphy Cc: Ganapatrao Kulkarni Cc: Catalin Marinas Cc: Nicolas Saenz Julienne Cc: Steve Capper Cc: Andrew Morton Cc: Mike Rapoport Signed-off-by: Barry Song --- arch/arm64/mm/init.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c index 1e93cfc7c47a..07d4d1fe7983 100644 --- a/arch/arm64/mm/init.c +++ b/arch/arm64/mm/init.c @@ -420,6 +420,8 @@ void __init bootmem_init(void) arm64_numa_init(); + dma_pernuma_cma_reserve(); + /* * must be done after arm64_numa_init() which calls numa_init() to * initialize node_online_map that gets used in hugetlb_cma_reserve()