diff options
Diffstat (limited to 'block/blk-mq-cpumap.c')
| -rw-r--r-- | block/blk-mq-cpumap.c | 27 |
1 files changed, 24 insertions, 3 deletions
diff --git a/block/blk-mq-cpumap.c b/block/blk-mq-cpumap.c index 097921329619..1065d7c65fa1 100644 --- a/block/blk-mq-cpumap.c +++ b/block/blk-mq-cpumap.c @@ -1,3 +1,8 @@ +/* + * CPU <-> hardware queue mapping helpers + * + * Copyright (C) 2013-2014 Jens Axboe + */ #include <linux/kernel.h> #include <linux/threads.h> #include <linux/module.h> @@ -80,19 +85,35 @@ int blk_mq_update_queue_map(unsigned int *map, unsigned int nr_queues) return 0; } -unsigned int *blk_mq_make_queue_map(struct blk_mq_reg *reg) +unsigned int *blk_mq_make_queue_map(struct blk_mq_tag_set *set) { unsigned int *map; /* If cpus are offline, map them to first hctx */ map = kzalloc_node(sizeof(*map) * num_possible_cpus(), GFP_KERNEL, - reg->numa_node); + set->numa_node); if (!map) return NULL; - if (!blk_mq_update_queue_map(map, reg->nr_hw_queues)) + if (!blk_mq_update_queue_map(map, set->nr_hw_queues)) return map; kfree(map); return NULL; } + +/* + * We have no quick way of doing reverse lookups. This is only used at + * queue init time, so runtime isn't important. + */ +int blk_mq_hw_queue_to_node(unsigned int *mq_map, unsigned int index) +{ + int i; + + for_each_possible_cpu(i) { + if (index == mq_map[i]) + return cpu_to_node(i); + } + + return NUMA_NO_NODE; +} |