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Commit d21ea4bc authored by Stephen Bates's avatar Stephen Bates Committed by Jens Axboe
Browse files

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: default avatarStephen Bates <sbates@raithlin.com>
Acked-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
parent 6e219353

block/blk-mq-sysfs.c

+10 −1
Original line number Diff line number Diff line
@@ -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[] = {