diff options
Diffstat (limited to 'block/blk-mq-sysfs.c')
| -rw-r--r-- | block/blk-mq-sysfs.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/block/blk-mq-sysfs.c b/block/blk-mq-sysfs.c index b91ce75bd35..b0ba264b052 100644 --- a/block/blk-mq-sysfs.c +++ b/block/blk-mq-sysfs.c @@ -244,6 +244,32 @@ static ssize_t blk_mq_hw_sysfs_tags_show(struct blk_mq_hw_ctx *hctx, char *page) return blk_mq_tag_sysfs_show(hctx->tags, page); } +static ssize_t blk_mq_hw_sysfs_cpus_show(struct blk_mq_hw_ctx *hctx, char *page) +{ + unsigned int i, queue_num, first = 1; + ssize_t ret = 0; + + blk_mq_disable_hotplug(); + + for_each_online_cpu(i) { + queue_num = hctx->queue->mq_map[i]; + if (queue_num != hctx->queue_num) + continue; + + if (first) + ret += sprintf(ret + page, "%u", i); + else + ret += sprintf(ret + page, ", %u", i); + + first = 0; + } + + blk_mq_enable_hotplug(); + + ret += sprintf(ret + page, "\n"); + return ret; +} + static struct blk_mq_ctx_sysfs_entry blk_mq_sysfs_dispatched = { .attr = {.name = "dispatched", .mode = S_IRUGO }, .show = blk_mq_sysfs_dispatched_show, @@ -294,6 +320,10 @@ static struct blk_mq_hw_ctx_sysfs_entry blk_mq_hw_sysfs_tags = { .attr = {.name = "tags", .mode = S_IRUGO }, .show = blk_mq_hw_sysfs_tags_show, }; +static struct blk_mq_hw_ctx_sysfs_entry blk_mq_hw_sysfs_cpus = { + .attr = {.name = "cpu_list", .mode = S_IRUGO }, + .show = blk_mq_hw_sysfs_cpus_show, +}; static struct attribute *default_hw_ctx_attrs[] = { &blk_mq_hw_sysfs_queued.attr, @@ -302,6 +332,7 @@ static struct attribute *default_hw_ctx_attrs[] = { &blk_mq_hw_sysfs_pending.attr, &blk_mq_hw_sysfs_ipi.attr, &blk_mq_hw_sysfs_tags.attr, + &blk_mq_hw_sysfs_cpus.attr, NULL, }; |