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authorWeiping Zhang <zhangweiping@didiglobal.com>2018-11-29 00:04:39 +0800
committerJens Axboe <axboe@kernel.dk>2018-11-28 09:08:28 -0700
commit65cd1d13b880920054d6c750679baa80b7f9c072 (patch)
treedec508cd4c0b5a9393775846286a55a6ff821ece /block/blk-sysfs.c
parent94a2c3a32b62e868dc1e3d854326745a7f1b8c7a (diff)
downloadlinux-65cd1d13b880920054d6c750679baa80b7f9c072.tar.bz2
block: add io timeout to sysfs
Give a interface to adjust io timeout(ms) by device. Signed-off-by: Weiping Zhang <zhangweiping@didiglobal.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-sysfs.c')
-rw-r--r--block/blk-sysfs.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c
index 80eef48fddc8..9f0cb370b39b 100644
--- a/block/blk-sysfs.c
+++ b/block/blk-sysfs.c
@@ -417,6 +417,26 @@ static ssize_t queue_poll_store(struct request_queue *q, const char *page,
return ret;
}
+static ssize_t queue_io_timeout_show(struct request_queue *q, char *page)
+{
+ return sprintf(page, "%u\n", jiffies_to_msecs(q->rq_timeout));
+}
+
+static ssize_t queue_io_timeout_store(struct request_queue *q, const char *page,
+ size_t count)
+{
+ unsigned int val;
+ int err;
+
+ err = kstrtou32(page, 10, &val);
+ if (err || val == 0)
+ return -EINVAL;
+
+ blk_queue_rq_timeout(q, msecs_to_jiffies(val));
+
+ return count;
+}
+
static ssize_t queue_wb_lat_show(struct request_queue *q, char *page)
{
if (!wbt_rq_qos(q))
@@ -685,6 +705,12 @@ static struct queue_sysfs_entry queue_dax_entry = {
.show = queue_dax_show,
};
+static struct queue_sysfs_entry queue_io_timeout_entry = {
+ .attr = {.name = "io_timeout", .mode = 0644 },
+ .show = queue_io_timeout_show,
+ .store = queue_io_timeout_store,
+};
+
static struct queue_sysfs_entry queue_wb_lat_entry = {
.attr = {.name = "wbt_lat_usec", .mode = 0644 },
.show = queue_wb_lat_show,
@@ -734,6 +760,7 @@ static struct attribute *default_attrs[] = {
&queue_dax_entry.attr,
&queue_wb_lat_entry.attr,
&queue_poll_delay_entry.attr,
+ &queue_io_timeout_entry.attr,
#ifdef CONFIG_BLK_DEV_THROTTLING_LOW
&throtl_sample_time_entry.attr,
#endif