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-rw-r--r--block/blk-sysfs.c31
1 files changed, 31 insertions, 0 deletions
diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c
index b9a6ed166649..21e275d7eed9 100644
--- a/block/blk-sysfs.c
+++ b/block/blk-sysfs.c
@@ -156,6 +156,30 @@ static ssize_t queue_nomerges_store(struct request_queue *q, const char *page,
return ret;
}
+static ssize_t queue_rq_affinity_show(struct request_queue *q, char *page)
+{
+ unsigned int set = test_bit(QUEUE_FLAG_SAME_COMP, &q->queue_flags);
+
+ return queue_var_show(set != 0, page);
+}
+
+static ssize_t
+queue_rq_affinity_store(struct request_queue *q, const char *page, size_t count)
+{
+ ssize_t ret = -EINVAL;
+#if defined(CONFIG_USE_GENERIC_SMP_HELPERS)
+ unsigned long val;
+
+ ret = queue_var_store(&val, page, count);
+ spin_lock_irq(q->queue_lock);
+ if (val)
+ queue_flag_set(QUEUE_FLAG_SAME_COMP, q);
+ else
+ queue_flag_clear(QUEUE_FLAG_SAME_COMP, q);
+ spin_unlock_irq(q->queue_lock);
+#endif
+ return ret;
+}
static struct queue_sysfs_entry queue_requests_entry = {
.attr = {.name = "nr_requests", .mode = S_IRUGO | S_IWUSR },
@@ -197,6 +221,12 @@ static struct queue_sysfs_entry queue_nomerges_entry = {
.store = queue_nomerges_store,
};
+static struct queue_sysfs_entry queue_rq_affinity_entry = {
+ .attr = {.name = "rq_affinity", .mode = S_IRUGO | S_IWUSR },
+ .show = queue_rq_affinity_show,
+ .store = queue_rq_affinity_store,
+};
+
static struct attribute *default_attrs[] = {
&queue_requests_entry.attr,
&queue_ra_entry.attr,
@@ -205,6 +235,7 @@ static struct attribute *default_attrs[] = {
&queue_iosched_entry.attr,
&queue_hw_sector_size_entry.attr,
&queue_nomerges_entry.attr,
+ &queue_rq_affinity_entry.attr,
NULL,
};