From patchwork Tue Aug 8 10:42:31 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ming Lei X-Patchwork-Id: 713268 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 3A9EFC001DE for ; Tue, 8 Aug 2023 16:13:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232100AbjHHQMt (ORCPT ); Tue, 8 Aug 2023 12:12:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46256 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231905AbjHHQLZ (ORCPT ); Tue, 8 Aug 2023 12:11:25 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EE0487D81 for ; Tue, 8 Aug 2023 08:46:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1691509580; 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=xmDg+NZ+45CiVZsrcRhVlp7iBoS4n+VtLARyxp0/jeQ=; b=RQmdraLAJ4xegtDPxbFoTVUJgChlRCibnWuQbhFT3GcGQ48Ji1Zzdk2moESh+Mwjpa0pM0 Q0ZQWXsh9//nsDTTHfCmxkHnxjC/3s5+HWQIb6ctSaPgaiKd1tkkMgX9X1spQgoq2cTqZa gc7HE7nYjK/XHSEuCwKGxrsTxoBKC78= 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-517-p5xl1a_TOn6Td8XWkcJAXw-1; Tue, 08 Aug 2023 06:43:09 -0400 X-MC-Unique: p5xl1a_TOn6Td8XWkcJAXw-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id EDE4C280FEC7; Tue, 8 Aug 2023 10:43:08 +0000 (UTC) Received: from localhost (unknown [10.72.120.3]) by smtp.corp.redhat.com (Postfix) with ESMTP id 3417A2166B25; Tue, 8 Aug 2023 10:43:07 +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 , Justin Tee , Justin Tee , James Smart Subject: [PATCH V3 06/14] scsi: lpfc: use blk_mq_max_nr_hw_queues() to calculate io vectors Date: Tue, 8 Aug 2023 18:42:31 +0800 Message-Id: <20230808104239.146085-7-ming.lei@redhat.com> In-Reply-To: <20230808104239.146085-1-ming.lei@redhat.com> References: <20230808104239.146085-1-ming.lei@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.6 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@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. Reviewed-by: Justin Tee Cc: Justin Tee Cc: James Smart Signed-off-by: Ming Lei --- drivers/scsi/lpfc/lpfc_init.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c index 3221a934066b..961ff392f1c5 100644 --- a/drivers/scsi/lpfc/lpfc_init.c +++ b/drivers/scsi/lpfc/lpfc_init.c @@ -13025,6 +13025,8 @@ lpfc_sli4_enable_msix(struct lpfc_hba *phba) flags |= PCI_IRQ_AFFINITY; } + vectors = min_t(unsigned int, vectors, scsi_max_nr_hw_queues()); + rc = pci_alloc_irq_vectors(phba->pcidev, 1, vectors, flags); if (rc < 0) { lpfc_printf_log(phba, KERN_INFO, LOG_INIT,