Add interface to configure the threshold
Signed-off-by: Shaohua Li <shli@xxxxxx>
---
block/blk-sysfs.c | 7 +++++++
block/blk-throttle.c | 25 +++++++++++++++++++++++++
block/blk.h | 4 ++++
3 files changed, 36 insertions(+)
diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c
index 3e284e4..f15aeed 100644
--- a/block/blk-sysfs.c
+++ b/block/blk-sysfs.c
@@ -532,6 +532,12 @@ static struct queue_sysfs_entry throtl_slice_entry = {
.show = blk_throtl_slice_show,
.store = blk_throtl_slice_store,
};
+
+static struct queue_sysfs_entry throtl_idle_threshold_entry = {
+ .attr = {.name = "throttling_idle_threshold", .mode = S_IRUGO | S_IWUSR },
+ .show = blk_throtl_idle_threshold_show,
+ .store = blk_throtl_idle_threshold_store,
+};
#endif
static struct attribute *default_attrs[] = {
@@ -563,6 +569,7 @@ static struct attribute *default_attrs[] = {
&queue_dax_entry.attr,
#ifdef CONFIG_BLK_DEV_THROTTLING
&throtl_slice_entry.attr,
+ &throtl_idle_threshold_entry.attr,
#endif
NULL,
};
diff --git a/block/blk-throttle.c b/block/blk-throttle.c
index cb5fd85..e403e88 100644
--- a/block/blk-throttle.c
+++ b/block/blk-throttle.c
@@ -2139,6 +2139,31 @@ ssize_t blk_throtl_slice_store(struct request_queue *q,
return count;
}
+ssize_t blk_throtl_idle_threshold_show(struct request_queue *q, char *page)
+{
+ u64 threshold = q->td->idle_ttime_threshold;
+
+ if (!q->td)
+ return -EINVAL;
+ do_div(threshold, 1000);
+ return sprintf(page, "%lluus\n", threshold);
+}
+
+ssize_t blk_throtl_idle_threshold_store(struct request_queue *q,
+ const char *page, size_t count)
+{
+ unsigned long v;
+
+ if (!q->td)
+ return -EINVAL;
+ if (kstrtoul(page, 10, &v))
+ return -EINVAL;
+ if (v == 0)
+ return -EINVAL;
+ q->td->idle_ttime_threshold = v * 1000;
+ return count;
+}
+
static int __init throtl_init(void)
{
kthrotld_workqueue = alloc_workqueue("kthrotld", WQ_MEM_RECLAIM, 0);
diff --git a/block/blk.h b/block/blk.h
index b433f35..2ebde12 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -292,6 +292,10 @@ extern void blk_throtl_exit(struct request_queue *q);
extern ssize_t blk_throtl_slice_show(struct request_queue *q, char *page);
extern ssize_t blk_throtl_slice_store(struct request_queue *q,
const char *page, size_t count);
+extern ssize_t blk_throtl_idle_threshold_show(struct request_queue *q,
+ char *page);
+extern ssize_t blk_throtl_idle_threshold_store(struct request_queue *q,
+ const char *page, size_t count);
extern void blk_throtl_bio_endio(struct bio *bio);
#else /* CONFIG_BLK_DEV_THROTTLING */
static inline void blk_throtl_drain(struct request_queue *q) { }
--
2.9.3
--
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