From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BD896C12002 for ; Mon, 19 Jul 2021 09:58:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A79F26108B for ; Mon, 19 Jul 2021 09:58:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236114AbhGSJRZ (ORCPT ); Mon, 19 Jul 2021 05:17:25 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:31238 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236048AbhGSJRU (ORCPT ); Mon, 19 Jul 2021 05:17:20 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1626688679; 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=JaaLSZZcYBkVwNwp6ibcAolkUL10+1ObvBKOoa79GDo=; b=BnhG4ogfJcFh7HqFLsdvnnhfqgSXK6lI229/1Jz912cyMpVzTpB3R7pZSmIQzlmmVFroI4 wlOmcN8hRV5FdZl+LvtA/dYOwtRKrdN4moqQS4geV23uZLvcuQrKarQm4m4Gi1ZL/Dw94a IF/7xl62EHQWCU/c3puxXDWLwvSRBqE= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-479-onV5UmV-Ph2kwv7lA1xfsw-1; Mon, 19 Jul 2021 05:57:58 -0400 X-MC-Unique: onV5UmV-Ph2kwv7lA1xfsw-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id DDE2F100C611; Mon, 19 Jul 2021 09:57:56 +0000 (UTC) Received: from localhost (ovpn-12-118.pek2.redhat.com [10.72.12.118]) by smtp.corp.redhat.com (Postfix) with ESMTP id 481F95C1C5; Mon, 19 Jul 2021 09:57:51 +0000 (UTC) From: Ming Lei To: Thomas Gleixner , Jens Axboe Cc: linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, Christoph Hellwig , Ming Lei Subject: [RFC PATCH 2/7] genirq/affinity: pass affinity managed mask array to irq_build_affinity_masks Date: Mon, 19 Jul 2021 17:57:24 +0800 Message-Id: <20210719095729.834332-3-ming.lei@redhat.com> In-Reply-To: <20210719095729.834332-1-ming.lei@redhat.com> References: <20210719095729.834332-1-ming.lei@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Pass affinity managed mask array to irq_build_affinity_masks() so that index of the first affinity managed vector is always zero, then we can simplify the implementation a bit. Signed-off-by: Ming Lei --- kernel/irq/affinity.c | 28 ++++++++++++---------------- 1 file changed, 12 insertions(+), 16 deletions(-) diff --git a/kernel/irq/affinity.c b/kernel/irq/affinity.c index 0c535591f2f2..c8da750f393b 100644 --- a/kernel/irq/affinity.c +++ b/kernel/irq/affinity.c @@ -246,14 +246,13 @@ static void alloc_nodes_vectors(unsigned int numvecs, static int __irq_build_affinity_masks(unsigned int startvec, unsigned int numvecs, - unsigned int firstvec, cpumask_var_t *node_to_cpumask, const struct cpumask *cpu_mask, struct cpumask *nmsk, struct irq_affinity_desc *masks) { unsigned int i, n, nodes, cpus_per_vec, extra_vecs, done = 0; - unsigned int last_affv = firstvec + numvecs; + unsigned int last_affv = numvecs; unsigned int curvec = startvec; nodemask_t nodemsk = NODE_MASK_NONE; struct node_vectors *node_vectors; @@ -272,7 +271,7 @@ static int __irq_build_affinity_masks(unsigned int startvec, cpumask_or(&masks[curvec].mask, &masks[curvec].mask, node_to_cpumask[n]); if (++curvec == last_affv) - curvec = firstvec; + curvec = 0; } return numvecs; } @@ -320,7 +319,7 @@ static int __irq_build_affinity_masks(unsigned int startvec, * may start anywhere */ if (curvec >= last_affv) - curvec = firstvec; + curvec = 0; irq_spread_init_one(&masks[curvec].mask, nmsk, cpus_per_vec); } @@ -335,11 +334,10 @@ static int __irq_build_affinity_masks(unsigned int startvec, * 1) spread present CPU on these vectors * 2) spread other possible CPUs on these vectors */ -static int irq_build_affinity_masks(unsigned int startvec, unsigned int numvecs, +static int irq_build_affinity_masks(unsigned int numvecs, struct irq_affinity_desc *masks) { - unsigned int curvec = startvec, nr_present = 0, nr_others = 0; - unsigned int firstvec = startvec; + unsigned int curvec = 0, nr_present = 0, nr_others = 0; cpumask_var_t *node_to_cpumask; cpumask_var_t nmsk, npresmsk; int ret = -ENOMEM; @@ -359,9 +357,8 @@ static int irq_build_affinity_masks(unsigned int startvec, unsigned int numvecs, build_node_to_cpumask(node_to_cpumask); /* Spread on present CPUs starting from affd->pre_vectors */ - ret = __irq_build_affinity_masks(curvec, numvecs, firstvec, - node_to_cpumask, cpu_present_mask, - nmsk, masks); + ret = __irq_build_affinity_masks(curvec, numvecs, node_to_cpumask, + cpu_present_mask, nmsk, masks); if (ret < 0) goto fail_build_affinity; nr_present = ret; @@ -373,13 +370,12 @@ static int irq_build_affinity_masks(unsigned int startvec, unsigned int numvecs, * out vectors. */ if (nr_present >= numvecs) - curvec = firstvec; + curvec = 0; else - curvec = firstvec + nr_present; + curvec = nr_present; cpumask_andnot(npresmsk, cpu_possible_mask, cpu_present_mask); - ret = __irq_build_affinity_masks(curvec, numvecs, firstvec, - node_to_cpumask, npresmsk, nmsk, - masks); + ret = __irq_build_affinity_masks(curvec, numvecs, node_to_cpumask, + npresmsk, nmsk, masks); if (ret >= 0) nr_others = ret; @@ -469,7 +465,7 @@ irq_create_affinity_masks(unsigned int nvecs, struct irq_affinity *affd) unsigned int this_vecs = affd->set_size[i]; int ret; - ret = irq_build_affinity_masks(curvec, this_vecs, masks); + ret = irq_build_affinity_masks(this_vecs, &masks[curvec]); if (ret) { kfree(masks); return NULL; -- 2.31.1