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| author | Weiping Zhang <zhangweiping@didiglobal.com> | 2018-11-28 17:04:39 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-11-28 17:08:28 +0100 |
| commit | 65cd1d13b880920054d6c750679baa80b7f9c072 (patch) | |
| tree | dec508cd4c0b5a9393775846286a55a6ff821ece /block/blk-sysfs.c | |
| parent | block: use rcu_work instead of call_rcu to avoid sleep in softirq (diff) | |
| download | linux-65cd1d13b880920054d6c750679baa80b7f9c072.tar.xz linux-65cd1d13b880920054d6c750679baa80b7f9c072.zip | |
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.c | 27 |
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 |