From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Stephen Bates To: linux-block@vger.kernel.org Cc: axboe@kernel.dk, hch@lst.de Subject: [PATCH 2/2] Enable zeroing of io_poll statistics Date: Tue, 13 Sep 2016 12:23:16 -0600 Message-Id: <1473790996-27038-3-git-send-email-sbates@raithlin.com> In-Reply-To: <1473790996-27038-1-git-send-email-sbates@raithlin.com> References: <1473790996-27038-1-git-send-email-sbates@raithlin.com> List-ID: Allow the io_poll statistics to be zeroed to make for easier logging of polling event. Signed-off-by: Stephen Bates --- 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