From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Keith Busch To: linux-nvme@lists.infradead.org, linux-block@vger.kernel.org, Jens Axboe , Jens Axboe , Christoph Hellwig , Thomas Gleixner Cc: Marc Merlin , Keith Busch Subject: [PATCH 2/6] irq/affinity: Assign offline CPUs a vector Date: Wed, 4 Jan 2017 17:41:07 -0500 Message-Id: <1483569671-1462-3-git-send-email-keith.busch@intel.com> In-Reply-To: <1483569671-1462-1-git-send-email-keith.busch@intel.com> References: <1483569671-1462-1-git-send-email-keith.busch@intel.com> List-ID: The offline CPUs need to assigned to something incase they come online later, otherwise anyone using the mapping for things other than affinity will have blank entries for that online CPU. Signed-off-by: Keith Busch --- kernel/irq/affinity.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/kernel/irq/affinity.c b/kernel/irq/affinity.c index b25dce0..2367531 100644 --- a/kernel/irq/affinity.c +++ b/kernel/irq/affinity.c @@ -129,6 +129,14 @@ irq_create_affinity_masks(int nvecs, const struct irq_affinity *affd) } done: + /* + * Assign offline CPUs to first mask in case they come online later. A + * driver can rerun this from a cpu notifier if they want a more optimal + * spread. + */ + cpumask_andnot(nmsk, cpu_possible_mask, cpu_online_mask); + irq_spread_init_one(masks, nmsk, cpumask_weight(nmsk)); + put_online_cpus(); /* Fill out vectors at the end that don't need affinity */ -- 2.5.5