From: Christoph Hellwig <hch@lst.de>
To: Thomas Gleixner <tglx@linutronix.de>, Jens Axboe <axboe@kernel.dk>
Cc: Keith Busch <keith.busch@intel.com>,
linux-nvme@lists.infradead.org, linux-block@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH 6/8] blk-mq: include all present CPUs in the default queue mapping
Date: Sat, 3 Jun 2017 16:04:01 +0200 [thread overview]
Message-ID: <20170603140403.27379-7-hch@lst.de> (raw)
In-Reply-To: <20170603140403.27379-1-hch@lst.de>
This way we get a nice distribution independent of the current cpu
online / offline state.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
block/blk-mq-cpumap.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/block/blk-mq-cpumap.c b/block/blk-mq-cpumap.c
index 8e61e8640e17..5eaecd40f701 100644
--- a/block/blk-mq-cpumap.c
+++ b/block/blk-mq-cpumap.c
@@ -35,7 +35,6 @@ int blk_mq_map_queues(struct blk_mq_tag_set *set)
{
unsigned int *map = set->mq_map;
unsigned int nr_queues = set->nr_hw_queues;
- const struct cpumask *online_mask = cpu_online_mask;
unsigned int i, nr_cpus, nr_uniq_cpus, queue, first_sibling;
cpumask_var_t cpus;
@@ -44,7 +43,7 @@ int blk_mq_map_queues(struct blk_mq_tag_set *set)
cpumask_clear(cpus);
nr_cpus = nr_uniq_cpus = 0;
- for_each_cpu(i, online_mask) {
+ for_each_present_cpu(i) {
nr_cpus++;
first_sibling = get_first_sibling(i);
if (!cpumask_test_cpu(first_sibling, cpus))
@@ -54,7 +53,7 @@ int blk_mq_map_queues(struct blk_mq_tag_set *set)
queue = 0;
for_each_possible_cpu(i) {
- if (!cpumask_test_cpu(i, online_mask)) {
+ if (!cpumask_test_cpu(i, cpu_present_mask)) {
map[i] = 0;
continue;
}
--
2.11.0
next prev parent reply other threads:[~2017-06-03 14:04 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-03 14:03 spread MSI(-X) vectors to all possible CPUs V2 Christoph Hellwig
2017-06-03 14:03 ` [PATCH 1/8] genirq: allow assigning affinity to present but not online CPUs Christoph Hellwig
2017-06-04 15:14 ` Sagi Grimberg
2017-06-17 23:21 ` Thomas Gleixner
2017-06-03 14:03 ` [PATCH 2/8] genirq: move pending helpers to internal.h Christoph Hellwig
2017-06-04 15:15 ` Sagi Grimberg
2017-06-03 14:03 ` [PATCH 3/8] genirq/affinity: factor out a irq_affinity_set helper Christoph Hellwig
2017-06-04 15:15 ` Sagi Grimberg
2017-06-16 10:23 ` Thomas Gleixner
2017-06-16 11:08 ` Thomas Gleixner
2017-06-16 12:00 ` Thomas Gleixner
2017-06-17 23:14 ` Thomas Gleixner
2017-06-03 14:03 ` [PATCH 4/8] genirq/affinity: assign vectors to all present CPUs Christoph Hellwig
2017-06-04 15:17 ` Sagi Grimberg
2017-06-03 14:04 ` [PATCH 5/8] genirq/affinity: update CPU affinity for CPU hotplug events Christoph Hellwig
2017-06-16 10:26 ` Thomas Gleixner
2017-06-16 10:29 ` Thomas Gleixner
2017-06-03 14:04 ` Christoph Hellwig [this message]
2017-06-04 15:11 ` [PATCH 6/8] blk-mq: include all present CPUs in the default queue mapping Sagi Grimberg
2017-06-03 14:04 ` [PATCH 7/8] blk-mq: create hctx for each present CPU Christoph Hellwig
2017-06-04 15:11 ` Sagi Grimberg
2017-06-07 9:10 ` Ming Lei
2017-06-07 19:06 ` Christoph Hellwig
2017-06-08 2:28 ` Ming Lei
2017-06-07 22:04 ` Omar Sandoval
2017-06-08 6:58 ` Christoph Hellwig
2017-06-03 14:04 ` [PATCH 8/8] nvme: allocate queues for all possible CPUs Christoph Hellwig
2017-06-04 15:13 ` Sagi Grimberg
2017-06-16 6:48 ` spread MSI(-X) vectors to all possible CPUs V2 Christoph Hellwig
2017-06-16 7:28 ` Thomas Gleixner
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