From patchwork Tue Aug 8 10:42:32 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ming Lei X-Patchwork-Id: 13346303 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 30F17C04A6A for ; Tue, 8 Aug 2023 16:13:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232106AbjHHQNX (ORCPT ); Tue, 8 Aug 2023 12:13:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51574 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232224AbjHHQMO (ORCPT ); Tue, 8 Aug 2023 12:12:14 -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 7AD04769C for ; Tue, 8 Aug 2023 08:46:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1691509594; 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=2DxJS8RxHnnXfV+djc15xnTM9KjPIA9NavQgadLTDR8=; b=ThuTsKVBA37ROSvCE5/ZehqklxA3aQMm/nFjqxSwgDqDa0iiR7C5tun/rgBI4mk2FPgUn9 d9s4p8IniVrMYgCfYElXgkOIAWeYcFcocYYd9CarTWeTfotrdX5kUYwvg6NZdmCF0j+RmT hFDDE81xaVLGKXILck+j56bRNcpWaK0= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-599-PuO5GixiPT2JItgpoi6aPg-1; Tue, 08 Aug 2023 06:43:12 -0400 X-MC-Unique: PuO5GixiPT2JItgpoi6aPg-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 2682885CCE2; Tue, 8 Aug 2023 10:43:12 +0000 (UTC) Received: from localhost (unknown [10.72.120.3]) by smtp.corp.redhat.com (Postfix) with ESMTP id 4F450140E963; Tue, 8 Aug 2023 10:43:10 +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 , Sreekanth Reddy , Sathya Prakash Veerichetty , Kashyap Desai , Sumit Saxena Subject: [PATCH V3 07/14] scsi: mpi3mr: take blk_mq_max_nr_hw_queues() into account for calculating io vectors Date: Tue, 8 Aug 2023 18:42:32 +0800 Message-Id: <20230808104239.146085-8-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 10.11.54.7 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. Cc: Sreekanth Reddy Cc: Sathya Prakash Veerichetty Cc: Kashyap Desai Cc: Sumit Saxena Signed-off-by: Ming Lei --- drivers/scsi/mpi3mr/mpi3mr_fw.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/scsi/mpi3mr/mpi3mr_fw.c b/drivers/scsi/mpi3mr/mpi3mr_fw.c index 5fa07d6ee5b8..8fe14e728af6 100644 --- a/drivers/scsi/mpi3mr/mpi3mr_fw.c +++ b/drivers/scsi/mpi3mr/mpi3mr_fw.c @@ -815,6 +815,9 @@ static int mpi3mr_setup_isr(struct mpi3mr_ioc *mrioc, u8 setup_one) desc.post_vectors = mrioc->requested_poll_qcount; min_vec = desc.pre_vectors + desc.post_vectors; + if (max_vectors - min_vec > scsi_max_nr_hw_queues()) + max_vectors = min_vec + scsi_max_nr_hw_queues(); + irq_flags |= PCI_IRQ_AFFINITY | PCI_IRQ_ALL_TYPES; retval = pci_alloc_irq_vectors_affinity(mrioc->pdev,