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| author | Stephen Bates <sbates@raithlin.com> | 2016-09-13 20:23:16 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2016-09-14 16:41:23 +0200 |
| commit | d21ea4bc0f6afbc852f1436c7c691c7b6fed0eb8 (patch) | |
| tree | 5e8b24d20552b58d2e04d1737161b3d8fd25ddd4 /block/blk-mq-sysfs.c | |
| parent | block: add poll_considered statistic (diff) | |
| download | linux-d21ea4bc0f6afbc852f1436c7c691c7b6fed0eb8.tar.xz linux-d21ea4bc0f6afbc852f1436c7c691c7b6fed0eb8.zip | |
block: enable zeroing of io_poll statistics
Allow the io_poll statistics to be zeroed to make for easier logging
of polling event.
Signed-off-by: Stephen Bates <sbates@raithlin.com>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/blk-mq-sysfs.c')
| -rw-r--r-- | block/blk-mq-sysfs.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/block/blk-mq-sysfs.c b/block/blk-mq-sysfs.c index ea8c3f58afbd..ac5160eb6862 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[] = { |