Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S967283AbdDSXmH (ORCPT ); Wed, 19 Apr 2017 19:42:07 -0400 Received: from mga01.intel.com ([192.55.52.88]:41675 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S966194AbdDSXmE (ORCPT ); Wed, 19 Apr 2017 19:42:04 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.37,222,1488873600"; d="scan'208";a="76490868" From: Keith Busch To: Thomas Gleixner , linux-kernel@vger.kernel.org Cc: Andrei Vagin , Keith Busch Subject: [PATCH] irq/affinity: Fix calculating vectors to assign Date: Wed, 19 Apr 2017 19:51:10 -0400 Message-Id: <1492645870-13019-1-git-send-email-keith.busch@intel.com> X-Mailer: git-send-email 2.5.5 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1035 Lines: 27 The vectors_per_node is calculated from the remaining available vectors. The current vector starts after pre_vectors, so we need to subtract that from the current to properly account for the number of remaining vectors to assign. Fixes: 3412386b531 ("irq/affinity: Fix extra vecs calculation") Reported-by: Andrei Vagin Signed-off-by: Keith Busch --- kernel/irq/affinity.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/irq/affinity.c b/kernel/irq/affinity.c index d052947..e2d356d 100644 --- a/kernel/irq/affinity.c +++ b/kernel/irq/affinity.c @@ -98,7 +98,7 @@ irq_create_affinity_masks(int nvecs, const struct irq_affinity *affd) int ncpus, v, vecs_to_assign, vecs_per_node; /* Spread the vectors per node */ - vecs_per_node = (affv - curvec) / nodes; + vecs_per_node = (affv - (curvec - affd->pre_vectors)) / nodes; /* Get the cpus on this node which are in the mask */ cpumask_and(nmsk, cpu_online_mask, cpumask_of_node(n)); -- 2.7.2