Allow the io_poll statistics to be zeroed to make for easier logging
of polling event.
Signed-off-by: Stephen Bates <sbates@xxxxxxxxxxxx>
---
block/blk-mq-sysfs.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/block/blk-mq-sysfs.c b/block/blk-mq-sysfs.c
index ea8c3f5..ac5160e 100644
--- a/block/blk-mq-sysfs.c
+++ b/block/blk-mq-sysfs.c
@@ -181,6 +181,14 @@ static ssize_t blk_mq_hw_sysfs_poll_show(struct blk_mq_hw_ctx *hctx, char *page)
hctx->poll_success);
}
+static ssize_t blk_mq_hw_sysfs_poll_store(struct blk_mq_hw_ctx *hctx,
+ const char *page, size_t size)
+{
+ hctx->poll_considered = hctx->poll_invoked = hctx->poll_success = 0;
+
+ return size;
+}
+
static ssize_t blk_mq_hw_sysfs_queued_show(struct blk_mq_hw_ctx *hctx,
char *page)
{
@@ -303,8 +311,9 @@ static struct blk_mq_hw_ctx_sysfs_entry blk_mq_hw_sysfs_cpus = {
.show = blk_mq_hw_sysfs_cpus_show,
};
static struct blk_mq_hw_ctx_sysfs_entry blk_mq_hw_sysfs_poll = {
- .attr = {.name = "io_poll", .mode = S_IRUGO },
+ .attr = {.name = "io_poll", .mode = S_IWUSR | S_IRUGO },
.show = blk_mq_hw_sysfs_poll_show,
+ .store = blk_mq_hw_sysfs_poll_store,
};
static struct attribute *default_hw_ctx_attrs[] = {
--
2.1.4
--
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