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Tue, 28 May 2024 13:49:31 +0000 (UTC) X-CSE-ConnectionGUID: YAS+qDNlQpCQifxs0kmv3g== X-CSE-MsgGUID: Rx2aD2ZbRZ2pluX9jlDtqw== X-IronPort-AV: E=McAfee;i="6600,9927,11085"; a="13437012" X-IronPort-AV: E=Sophos;i="6.08,195,1712646000"; d="scan'208";a="13437012" Received: from orviesa008.jf.intel.com ([10.64.159.148]) by fmvoesa109.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 May 2024 06:49:32 -0700 X-CSE-ConnectionGUID: Gxic2PtmSeaMexgrNFO7Vg== X-CSE-MsgGUID: DuaGHpfnSTOmjE6A9Fh0HA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.08,195,1712646000"; d="scan'208";a="35577423" Received: from newjersey.igk.intel.com ([10.102.20.203]) by orviesa008.jf.intel.com with ESMTP; 28 May 2024 06:49:29 -0700 From: Alexander Lobakin To: intel-wired-lan@lists.osuosl.org Date: Tue, 28 May 2024 15:48:38 +0200 Message-ID: <20240528134846.148890-5-aleksander.lobakin@intel.com> X-Mailer: git-send-email 2.45.1 In-Reply-To: <20240528134846.148890-1-aleksander.lobakin@intel.com> References: <20240528134846.148890-1-aleksander.lobakin@intel.com> MIME-Version: 1.0 X-Mailman-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1716904172; x=1748440172; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=sRl0ELhTQQck76zxYOCsS8QdpZbM6qiqWoEIxhJbBsg=; b=RASzMhuVEHmJ/uKO/3w0NafkwX+MmXRPR5pErp+AuqbaSAPqwzvFwXur FMRxT5RvKx3BX2LP6buoDxp38GcflORML+5DlYQZUi7BL6a5JpBx1yMfj zvz/OdzdaTk/RihIVZSORWYcxJwy95hzo5PVthG2e8+1hV8w0XlYifMdC 9fwad5lPbUQSbDs45/9KQXjJUtVjtBvcT7Ej1T8JLZ9tFFL276qgw9uA2 QiTrbdIuaLJuTC7w7SI0d0TLH+cEiO5ukX7npJqMYZYp4kQacthpzFXSY K6FsAXSDCKL45re4yuonk2xyaORU/5yUpdHVLRUu20DL8uR4pzr22n6WD A==; X-Mailman-Original-Authentication-Results: smtp3.osuosl.org; dmarc=pass (p=none dis=none) header.from=intel.com X-Mailman-Original-Authentication-Results: smtp3.osuosl.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.a=rsa-sha256 header.s=Intel header.b=RASzMhuV Subject: [Intel-wired-lan] [PATCH iwl-next 04/12] idpf: avoid bloating &idpf_q_vector with big %NR_CPUS X-BeenThere: intel-wired-lan@osuosl.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Wired Ethernet Linux Kernel Driver Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mina Almasry , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Alexander Lobakin , Eric Dumazet , Tony Nguyen , nex.sw.ncis.osdt.itp.upstreaming@intel.com, Przemek Kitszel , Jakub Kicinski , Paolo Abeni , "David S. Miller" Errors-To: intel-wired-lan-bounces@osuosl.org Sender: "Intel-wired-lan" 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. Reviewed-by: Przemek Kitszel 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 ce4ade9c864f..9e4ba0aaf3ab 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 7be5a723f558..f569ea389b04 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)