From patchwork Fri May 10 15:26:12 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Lobakin X-Patchwork-Id: 13661756 X-Patchwork-Delegate: kuba@kernel.org Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.12]) (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 689C012C526; Fri, 10 May 2024 15:27:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.12 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715354869; cv=none; b=nRwnTJqgjNk2ZowQV/Hd+WkU2FHTjr/ee+juu9T2crszp/rvf0dRDnAdiFouD71+KKNmE06EgVJfluv0JYlbwnW830Mya8/E0/+Z0aHmnG5JgRpdbayl5qpRWcex/TPl24xILXf51nRTa9tUBSFQoY7Wj9Fe73/kSHpZLk1hVxc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715354869; c=relaxed/simple; bh=IicC0xPQgpcazt740r57XpVtwR2n0DTaEXjZkC02oQc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=PzK1uiLBXM9hROGJ+0IgAo+7w6yGucA5P4P0eiat69T02B0FxyQp8PPjaDFvs1sQIJfqyPK7qxxWqz4gpRA96iq2PtU9TqBb1RAqS9dsqLwPEhq5or96f3jotvYRk/1LWQ8hmRX8lhp6JVgn/H2oICW5VuUyLAYDMYy+8e4eOyQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=NVWplveO; arc=none smtp.client-ip=192.198.163.12 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="NVWplveO" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1715354853; x=1746890853; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=IicC0xPQgpcazt740r57XpVtwR2n0DTaEXjZkC02oQc=; b=NVWplveOkbLPSbAFyvj+D6cZkWnwOaxC+BQFT9Kv6q22I4YJniT13K88 9dgQ85HlgYJjJrYN78Zs70iba05BBNWHAW0KCfpE2itu5tGPQQKDAqQQR RNwMqBQGw84R2TXw51GtyK4N12oDFDlG1HGTdwZsFjtJ3DLUq9H/xiNui 0vW4bwhnu8WD3qLChOzMUWQAa5lEHUk4Mf/z0ctiLhLahZnXA9mn46BMG xqPChwyd9ynY9Zj8RzVvmgt4mgTDciPuAbkXgwHGKJeC1GVBLbZo621/1 IsO4Jn9CT65HwZoF4kzQ35F34UjkBWV5R74UQBw7lrEEm+rwVBCiEr6N+ A==; X-CSE-ConnectionGUID: IUOYOIH8T8OxxB/3nD615g== X-CSE-MsgGUID: yhQNTqLnTZeUYrIQpIADHA== X-IronPort-AV: E=McAfee;i="6600,9927,11068"; a="15152589" X-IronPort-AV: E=Sophos;i="6.08,151,1712646000"; d="scan'208";a="15152589" Received: from orviesa008.jf.intel.com ([10.64.159.148]) by fmvoesa106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 May 2024 08:27:32 -0700 X-CSE-ConnectionGUID: 5OjfPU3uT+GseBQ3EZKkmQ== X-CSE-MsgGUID: xHfSdIytQPeJCZShT2K+0w== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.08,151,1712646000"; d="scan'208";a="30208262" Received: from newjersey.igk.intel.com ([10.102.20.203]) by orviesa008.jf.intel.com with ESMTP; 10 May 2024 08:27:29 -0700 From: Alexander Lobakin To: intel-wired-lan@lists.osuosl.org Cc: Alexander Lobakin , Tony Nguyen , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , nex.sw.ncis.osdt.itp.upstreaming@intel.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH RFC iwl-next 04/12] idpf: avoid bloating &idpf_q_vector with big %NR_CPUS Date: Fri, 10 May 2024 17:26:12 +0200 Message-ID: <20240510152620.2227312-5-aleksander.lobakin@intel.com> X-Mailer: git-send-email 2.45.0 In-Reply-To: <20240510152620.2227312-1-aleksander.lobakin@intel.com> References: <20240510152620.2227312-1-aleksander.lobakin@intel.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org X-Patchwork-State: RFC With CONFIG_MAXSMP, sizeof(cpumask_t) is 1 Kb. The queue vector structure has them embedded, which means 1 additional Kb of not really hotpath data. We have cpumask_var_t, which is either an embedded cpumask or a pointer for allocating it dynamically when it's big. Use it instead of plain cpumasks and put &idpf_q_vector on a good diet. Also remove redundant pointer to the interrupt name from the structure. request_irq() saves it and free_irq() returns it on deinit, so that you can free the memory. Signed-off-by: Alexander Lobakin --- drivers/net/ethernet/intel/idpf/idpf_txrx.h | 7 +++---- drivers/net/ethernet/intel/idpf/idpf_lib.c | 13 ++++++------- drivers/net/ethernet/intel/idpf/idpf_txrx.c | 20 +++++++++++++------- 3 files changed, 22 insertions(+), 18 deletions(-) diff --git a/drivers/net/ethernet/intel/idpf/idpf_txrx.h b/drivers/net/ethernet/intel/idpf/idpf_txrx.h index fb645c6887b3..428b82b4de80 100644 --- a/drivers/net/ethernet/intel/idpf/idpf_txrx.h +++ b/drivers/net/ethernet/intel/idpf/idpf_txrx.h @@ -505,7 +505,6 @@ struct idpf_intr_reg { /** * struct idpf_q_vector * @vport: Vport back pointer - * @affinity_mask: CPU affinity mask * @napi: napi handler * @v_idx: Vector index * @intr_reg: See struct idpf_intr_reg @@ -526,11 +525,10 @@ struct idpf_intr_reg { * @num_bufq: Number of buffer queues * @bufq: Array of buffer queues to service * @total_events: Number of interrupts processed - * @name: Queue vector name + * @affinity_mask: CPU affinity mask */ struct idpf_q_vector { struct idpf_vport *vport; - cpumask_t affinity_mask; struct napi_struct napi; u16 v_idx; struct idpf_intr_reg intr_reg; @@ -556,7 +554,8 @@ struct idpf_q_vector { struct idpf_buf_queue **bufq; u16 total_events; - char *name; + + cpumask_var_t affinity_mask; }; struct idpf_rx_queue_stats { diff --git a/drivers/net/ethernet/intel/idpf/idpf_lib.c b/drivers/net/ethernet/intel/idpf/idpf_lib.c index 3e8b24430dd8..a8be09a89943 100644 --- a/drivers/net/ethernet/intel/idpf/idpf_lib.c +++ b/drivers/net/ethernet/intel/idpf/idpf_lib.c @@ -69,7 +69,7 @@ static void idpf_deinit_vector_stack(struct idpf_adapter *adapter) static void idpf_mb_intr_rel_irq(struct idpf_adapter *adapter) { clear_bit(IDPF_MB_INTR_MODE, adapter->flags); - free_irq(adapter->msix_entries[0].vector, adapter); + kfree(free_irq(adapter->msix_entries[0].vector, adapter)); queue_delayed_work(adapter->mbx_wq, &adapter->mbx_task, 0); } @@ -124,15 +124,14 @@ static void idpf_mb_irq_enable(struct idpf_adapter *adapter) */ static int idpf_mb_intr_req_irq(struct idpf_adapter *adapter) { - struct idpf_q_vector *mb_vector = &adapter->mb_vector; int irq_num, mb_vidx = 0, err; + char *name; irq_num = adapter->msix_entries[mb_vidx].vector; - mb_vector->name = kasprintf(GFP_KERNEL, "%s-%s-%d", - dev_driver_string(&adapter->pdev->dev), - "Mailbox", mb_vidx); - err = request_irq(irq_num, adapter->irq_mb_handler, 0, - mb_vector->name, adapter); + name = kasprintf(GFP_KERNEL, "%s-%s-%d", + dev_driver_string(&adapter->pdev->dev), + "Mailbox", mb_vidx); + err = request_irq(irq_num, adapter->irq_mb_handler, 0, name, adapter); if (err) { dev_err(&adapter->pdev->dev, "IRQ request for mailbox failed, error: %d\n", err); diff --git a/drivers/net/ethernet/intel/idpf/idpf_txrx.c b/drivers/net/ethernet/intel/idpf/idpf_txrx.c index 211c403a4c98..500754795cc8 100644 --- a/drivers/net/ethernet/intel/idpf/idpf_txrx.c +++ b/drivers/net/ethernet/intel/idpf/idpf_txrx.c @@ -3613,6 +3613,8 @@ void idpf_vport_intr_rel(struct idpf_vport *vport) q_vector->tx = NULL; kfree(q_vector->rx); q_vector->rx = NULL; + + free_cpumask_var(q_vector->affinity_mask); } /* Clean up the mapping of queues to vectors */ @@ -3661,7 +3663,7 @@ static void idpf_vport_intr_rel_irq(struct idpf_vport *vport) /* clear the affinity_mask in the IRQ descriptor */ irq_set_affinity_hint(irq_num, NULL); - free_irq(irq_num, q_vector); + kfree(free_irq(irq_num, q_vector)); } } @@ -3812,6 +3814,7 @@ static int idpf_vport_intr_req_irq(struct idpf_vport *vport, char *basename) for (vector = 0; vector < vport->num_q_vectors; vector++) { struct idpf_q_vector *q_vector = &vport->q_vectors[vector]; + char *name; vidx = vport->q_vector_idxs[vector]; irq_num = adapter->msix_entries[vidx].vector; @@ -3825,18 +3828,18 @@ static int idpf_vport_intr_req_irq(struct idpf_vport *vport, char *basename) else continue; - q_vector->name = kasprintf(GFP_KERNEL, "%s-%s-%d", - basename, vec_name, vidx); + name = kasprintf(GFP_KERNEL, "%s-%s-%d", basename, vec_name, + vidx); err = request_irq(irq_num, idpf_vport_intr_clean_queues, 0, - q_vector->name, q_vector); + name, q_vector); if (err) { netdev_err(vport->netdev, "Request_irq failed, error: %d\n", err); goto free_q_irqs; } /* assign the mask for this irq */ - irq_set_affinity_hint(irq_num, &q_vector->affinity_mask); + irq_set_affinity_hint(irq_num, q_vector->affinity_mask); } return 0; @@ -3845,7 +3848,7 @@ static int idpf_vport_intr_req_irq(struct idpf_vport *vport, char *basename) while (--vector >= 0) { vidx = vport->q_vector_idxs[vector]; irq_num = adapter->msix_entries[vidx].vector; - free_irq(irq_num, &vport->q_vectors[vector]); + kfree(free_irq(irq_num, &vport->q_vectors[vector])); } return err; @@ -4255,7 +4258,7 @@ static void idpf_vport_intr_napi_add_all(struct idpf_vport *vport) /* only set affinity_mask if the CPU is online */ if (cpu_online(v_idx)) - cpumask_set_cpu(v_idx, &q_vector->affinity_mask); + cpumask_set_cpu(v_idx, q_vector->affinity_mask); } } @@ -4299,6 +4302,9 @@ int idpf_vport_intr_alloc(struct idpf_vport *vport) q_vector->rx_intr_mode = IDPF_ITR_DYNAMIC; q_vector->rx_itr_idx = VIRTCHNL2_ITR_IDX_0; + if (!zalloc_cpumask_var(&q_vector->affinity_mask, GFP_KERNEL)) + goto error; + q_vector->tx = kcalloc(txqs_per_vector, sizeof(*q_vector->tx), GFP_KERNEL); if (!q_vector->tx)