From patchwork Wed Jul 26 09:40:27 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ming Lei X-Patchwork-Id: 13327773 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 CBB05C0015E for ; Wed, 26 Jul 2023 09:42:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233696AbjGZJmW (ORCPT ); Wed, 26 Jul 2023 05:42:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58178 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233691AbjGZJmC (ORCPT ); Wed, 26 Jul 2023 05:42:02 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BA828E69 for ; Wed, 26 Jul 2023 02:41:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1690364473; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=991prPOr3CC0OYGragucunFfWE1ASbB8T8+eCTuUx4g=; b=VHY2DQwkupPaZpjlyvWNieKFLV4s4SuYZCicd2bk6Krovt60q2/tQLuiD+6K5umjv+1sqL 8Ci+RNPxauGO4Oed+68ISBRTAyYYFT7F994EaN3faj7oFtEPGp+hDdf7LQeoFUWB/Was6H eQjSg69inRZgYY1PypX6FQYVPVgECCA= Received: from mimecast-mx02.redhat.com (66.187.233.73 [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-438-06SQxYjyMtOj-FMRXjmHLA-1; Wed, 26 Jul 2023 05:41:07 -0400 X-MC-Unique: 06SQxYjyMtOj-FMRXjmHLA-1 Received: from smtp.corp.redhat.com (int-mx10.intmail.prod.int.rdu2.redhat.com [10.11.54.10]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id F1EF53815F60; Wed, 26 Jul 2023 09:41:06 +0000 (UTC) Received: from localhost (unknown [10.72.120.4]) by smtp.corp.redhat.com (Postfix) with ESMTP id 2ED79492C13; Wed, 26 Jul 2023 09:41:05 +0000 (UTC) From: Ming Lei To: Jens Axboe , Christoph Hellwig , linux-nvme@lists.infradead.org, "Martin K . Petersen" , linux-scsi@vger.kernel.org Cc: linux-block@vger.kernel.org, Wen Xiong , Keith Busch , Ming Lei , Jack Wang Subject: [PATCH V2 9/9] scsi: pm8001: take blk_mq_max_nr_hw_queues() into account for calculating io vectors Date: Wed, 26 Jul 2023 17:40:27 +0800 Message-Id: <20230726094027.535126-10-ming.lei@redhat.com> In-Reply-To: <20230726094027.535126-1-ming.lei@redhat.com> References: <20230726094027.535126-1-ming.lei@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.10 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Take blk-mq's knowledge into account for calculating io queues. Fix wrong queue mapping in case of kdump kernel. On arm and ppc64, 'maxcpus=1' is passed to kdump kernel command line, see `Documentation/admin-guide/kdump/kdump.rst`, so num_possible_cpus() still returns all CPUs because 'maxcpus=1' just bring up one single cpu core during booting. blk-mq sees single queue in kdump kernel, and in driver's viewpoint there are still multiple queues, this inconsistency causes driver to apply wrong queue mapping for handling IO, and IO timeout is triggered. Meantime, single queue makes much less resource utilization, and reduce risk of kernel failure. Acked-by: Jack Wang Signed-off-by: Ming Lei --- drivers/scsi/pm8001/pm8001_init.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/pm8001/pm8001_init.c b/drivers/scsi/pm8001/pm8001_init.c index 2e886c1d867d..3e769f4fe26d 100644 --- a/drivers/scsi/pm8001/pm8001_init.c +++ b/drivers/scsi/pm8001/pm8001_init.c @@ -965,6 +965,8 @@ static u32 pm8001_setup_msix(struct pm8001_hba_info *pm8001_ha) rc = pci_alloc_irq_vectors(pm8001_ha->pdev, 1, 1, PCI_IRQ_MSIX); } else { + unsigned int max_vecs = min_t(unsigned int, PM8001_MAX_MSIX_VEC, + scsi_max_nr_hw_queues() + 1); /* * Queue index #0 is used always for housekeeping, so don't * include in the affinity spreading. @@ -973,7 +975,7 @@ static u32 pm8001_setup_msix(struct pm8001_hba_info *pm8001_ha) .pre_vectors = 1, }; rc = pci_alloc_irq_vectors_affinity( - pm8001_ha->pdev, 2, PM8001_MAX_MSIX_VEC, + pm8001_ha->pdev, 2, max_vecs, PCI_IRQ_MSIX | PCI_IRQ_AFFINITY, &desc); }